DESC:FIELD OF INVENTION
The present invention relates to a composition comprising an acid neutralizing compound, a compound incapacitating V2O5 and a combustion improver, and a process for preparing the same. Another embodiment of the present invention relates to a multi metal dispersion composition comprising an acid neutralizing compound, a compound incapacitating V2O5, a combustion improver, a dispersant, and an organic medium and a process for preparing the same. Yet another embodiment of the present invention provides a fuel mixture comprising a hydrocarbon fuel and a multi metal dispersion composition and a process for preparing the same. The present invention also relates to a fuel additive composition. Particularly, the invention pertains to a fuel additive composition containing a nanodispersion of engineered nanomaterials of alkaline compounds for improving the corrosion resistance ability.
BACKGROUND OF THE INVENTION
Energy can be produced by the combustion of fuels in combustion equipment, such fuels including but not limited to fossil fuels such as liquid petroleum, solid hydrocarbon fuels, and other fuel products, including wood fuels. With the ever depleting fuel resources, improvement in the combustion of fuel oil has been a major concern. Several efforts have been made in this direction, among which the use of additive systems has been reported the most. Additives like Tetraethyl lead, manganese, iron, copper, cerium are few of them which increase the combustion characteristics, but at the same time there has been observed an increase in the emission of the harmful corrosive gases also.
During combustion of fuel, the contaminants such as sulfur present in the fuel combines with oxygen to form gaseous sulfur diox¬ide (SO2). Part of this SO2 get further oxidized into SO3. The percent of SO2 that is oxidized to SO3 depends on various factors such as furnace geometry (surface area), oxygen availability (present at temperature equivalent to 815°C or above), fuel vanadium levels, and fuel sulfur levels. SO3 formation is also increased by catalytic effect of transition metal oxides.
The SO3 hydrates to form H2SO4 vapor in the flue gas stream, which finally, condenses to form sub-micron aerosol. The acid aerosols that escape the capture or collection in the downstream flue gas path (air heaters) or in equipments like electrostatic precipitators, bag houses and Fluid Gas Dehydrogenation (FGD) systems exit the stack and contribute to total particulate emissions. Therefore, SO3 emissions play an important role in total particulate emissions.
In addition selective catalytic reduction (SCR) technology which is generally used to reduce NOX emission in the presence of ammonia also increases the conversion of SO2 to SO3 in the flue gas. The SCR however, depending on design, can contribute up to an additional 2% conversion of SO2 to SO3. This can easily double or triple the total SO3 concentrations exiting a SCR unit.
Despite relatively low acid or SO3 concentrations exiting the stack, the light scattering properties of these fine particles can easily create a visible plume and high opacity reading. It is generally accepted that every 1 ppm-v SO3 will contribute 1 to 3 % opacity making exhaust gas concentrations of 10-15 ppm-v SO3 or higher likely conditions for opacity and acid plume problems. In addition, deposition or formation of acid on any metal surfaces below the acid dew point causes corrosion within the unit.
Sulfur trioxide not only contributes to opacity and acid problems noted, but it also reacts with ammonia (injected at SCR) and water vapor to form ammonium bisulfate (1) and ammonium sulfate (2).
NH3 + SO3 + H2O Æ NH4HSO4
2NH3 + SO3 + H2O Æ (NH4)2SO4
Both of these ammonia salts can cause fouling and corrosion problems in the system.
The ultimate allowable SO3/H2SO4 emission is based on the allowed total particulate emission and the portion that is allowed from SO3/H2SO4, which is dependent on the fuel sulfur content and ash constituents as well as the selection of back end equipment and any sorbent injection needs. Acid gas emissions, such as SO3, must be controlled & the selected SO3 mitigation technolo¬gies must minimize the acidic emissions so as to meet the set emissions standards.
Various technologies have been utilized for SO3 mitigation such as the retrofit of a Wet FGD system to use higher sulfur coals. This can impact boiler conversion of SO2 to SO3 and economizer outlet temperature. Both of these issues could substantially affect stack H2SO4 emissions by increasing values. Air heater operation (temperature and operating conditions) has a large effect on the amount of SO3 exiting the air heater and even the Dry ESP. Operating conditions and equipment sizing are important considerations in SO3mitigation. Wet FGDs do collect some H2SO4 but not to the levels that provide optimal stack condition on higher sulfur coals.
Magnesium compounds in slurry have long been used as fuel oil additive for SO3 scavenging to allow more efficient boiler operation. Magnesium compounds also provide efficient back end SO3 control and ash modification to counter several side effects & cost overrun associated with the selective catalytic reduction (SCR) technology in oil and coal fired furnaces.
Magnesia based fuel oil additives in slurry form have been used for more than twenty five years against high temperature corrosion from sodium-vanadium complexes, to minimize SO2 conversion to SO3 due to vanadium’s catalytic effect, to improve ash friability, and to reduce cold end corrosion resulting from sulfuric acid condensation.
Likewise, magnesium oxide (MgO) powder & slurry was used as flue gas additive to reduce stack gas plume opacity and protect against back end corrosion resulting from SO3 formed with the higher sulfur content coals and oil. Though high activity magnesium oxide can be used to treat opacity and acid plume problems created or aggravated by SCR units on line, it may also be considered to protect against chemical poisoning or blinding of the catalyst and to reduce corrosion and fouling. However loading of effective magnesium content, activity of the particle, stability of the slurry are some of the limiting issues.
Lime (CaO) has been considered as an additive to treat the by products produced in the boiler. However, lime reacts with the ammonia salts to form gypsum
CaO + NH4HSO4 Æ CaSO4 • 2H2O
The gypsum thus formed creates fouling problems for the air heater and potential poisoning problems for the catalyst. Gypsum forms a hard, non-friable deposit with very low solubility (2 g/l) that is difficult to remove or wash clean.
Using magnesium oxide as an oil additive to the flue gas provides a remedy for these problems. Magnesium oxide not only captures SO3 from the flue gas to form magnesium sulfate but also reacts with the ammonia salts to form ammonium magnesium sulfate.
MgO + 2NH4HSO4 Æ (NH4)2Mg(SO4)2 + H2O
MgO + SO3 Æ MgSO4
The ammonium magnesium sulfate formed is friable and has a melting point at 750 °F. These properties in the ash not only make deposits less likely, but also make removal easier and more feasible with conventional soot blowers and sonic horns. Unlike gypsum, ammonium magnesium sulfate is very soluble (160 g/l) making it easy to remove by water washing. Unlike ammonium bisulfate’s corrosive characteristic, ammonium magnesium sulfate is non-corrosive (2% wt solution measures 9 pH). Magnesium sulfate is also non-corrosive, water soluble, and easily cleaned.
To conclude, magnesia compounds are again emerging as back end additives to the flue gas to treat new problems that have developed from the use of SCR technology. Back end injection of high activity magnesium oxide powder or slurry has been demonstrated to efficiently reduce SO3 emissions by more than 85%, to maintain visual opacity below 5%, and provide stack opacity control to pre-SCR operating levels. Additionally, magnesium oxide in the presence of sulfur trioxide and ammonia has been documented to form ammonium magnesium sulfate, a friable, water soluble, non-corrosive salt that is easier to clean and less prone to ash build up and blockage. Magnesium oxide injection can provide an effective and efficient method to treat SO3 related issues as more SCR units are put in service in the industry. Benefits from this magnesia application will assure prolonged unit life, corrosion prevention, reduced maintenance costs, and control of stack gas plume opacity.
Though several attempts have been made to reduce the corrosion generated during combustion from fuel oil, but most of them are associated with the one or the other limitations such as high cost, ineffective dosing, ineffective loading, less stability of the slurry in water as well as less reactivity of the low surface area powder & high ash content. Further several other equipments are required to do back end injection. The proposed invention is an attempt to overcome these drawbacks in the present art.
SUMMARY OF THE INVENTION
Accordingly the present invention provides a composition comprising an acid neutralizing compound, a compound incapacitating V2O5 and a combustion improver, and a process for preparing the same.
Another embodiment of the present invention provides a multi metal dispersion composition comprising an acid neutralizing compound, a compound incapacitating V2O5; a combustion improver, a dispersant, and an organic medium and a process for preparing the same.
Yet another embodiment of the present invention provides a fuel mixture comprising a hydrocarbon fuel and a multi metal dispersion composition and a process for preparing the same.
DETAILED DESCRIPTION OF THE INVENTION
While the invention is susceptible to various modifications and alternative forms, specific embodiment thereof will be described in detail below. It should be understood, however that it is not intended to limit the invention to the particular forms disclosed, but on the contrary, the invention is to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
The present invention is directed towards an oil based additive composition containing a nanodispersion of engineered nanomaterials for improving the corrosion resistance ability. This additive is capable of neutralizing & transferring the corrosive gases from the vapor phase to polar soluble phase.
The fuel oil additive composition disclosed in this invention includes nanodispersion of engineered nanomaterials in hydrocarbon oil. These nanomaterials are of compounds which are generally alkaline in nature including but not limited to compounds of magnesium, calcium, etc. These oil-soluble metallic compound present in the hydrocarbon are in range from about 1 ppm to about 1000 ppm.

The size of the particles in the fuel additive plays a role in catalytic activity. The particle size in the composite additive can be controlled during the manufacturing process. The additive of the present invention, with a a particle size distribution of D10 = 50 nm; D50 = 120 nm; and D90 = 250 nm results in a significant improvement in performance over additives with larger median particle sizes.

The additive compositions disclosed in the present invention are prepared by small molecule surface modification. These nanodispersions are stable and are free from carboxylate, sulfonate, acetic and mixtures thereof. The nanodispersion is over-based & refers to the excess amount of base as compared with the acid of the solution. Base catalyzed reactions follow two laws. Firstly, the order of the reaction is reduced by an order of one compared to acid based, and secondly, the rate of reaction is proportional to the concentration of the active basic material. This nanodispersion is capable of neutralizing & transferring the corrosive gases SO3/H2SO4 from the vapor phase to polar soluble phase and reduces acidic emissions from boilers, stacks, HRSGs, engines, and other equipment operating on fossil and other fuels would be advantageous.
One aspect of the invention discloses a process for preparation of such additive through small molecule surface modification technique. In this process the slurry of active material is processed in a top down approach in presence of surface modifier molecule. The nanosized active moieties are meachanochemically attached with the dispersant molecules & stabilized in the fuel system.

Another aspect of the present invention discloses a fuel mixture which is suitable for use for power generation, comprising a liquid hydrocarbon fuel and the invented fuel additive. The hydrocarbon fuel is selected from the group consisting of, but not limited to fuel, residual fuel oil and equivalent fuel.
The invented additive can be used in stationary as well as mobile power generation unit which are operated with or without a combustion catalyst.
More particularly present invention provides a composition comprising:
8 to 45 wt. % of an acid neutralizing compound;
10 to 90 wt. % of a compound incapacitating V2O5; and
1 to 12 wt. % of a combustion improver, the wt. % being based upon the weight of the composition.

In one embodiment of the present inventionthe composition has a particle size distribution of D10 = 50 nm; D50 = 120 nm; and D90 = 250 nm.

Another embodiment of the present invention provides a composition, wherein the acid neutralizing compound is selected from the group comprising of oxide, hydroxide, acetate, carbonate, bicarbonate, phosphate, naphthenate, tartarate, stearate, oleate, palmitate, salicylate, phenate, sulphonate of alkali and alkaline earth metal. The alkali and alkaline earth metal is selected from the group comprising of sodium, potassium, lithium, calcium, magnesium, barium, and strontium. More particularly, the acid neutralizing compound is calcium compound and/or magnesium compound and is selected from the group comprising of calcium oxide, calcium hydroxide, calcium carbonate, calcium acetate, magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium acetate, calcium stearate, calcium palmitate, calcium oleate, calcium sulphonate, magnesium phenate, magnesium stearate, magnesium oleate, magnesium palmitate, and magnesium sulphonate.

Another embodiment of the present invention provides a composition, wherein the compound incapacitating V2O5 is selected from the group comprising of magnesium oxide, magnesium hydroxide, and magnesium carbonate. In one of the preferred embodiment the compound incapacitating V2O5 is preferably magnesium oxide.

Another embodiment of the present invention provides a composition, wherein the combustion improver is selected from the group comprising of ferric oxide, ferric acetate, and ferric acetylacetonate.

Further, the present invention provides a process for preparing a composition, wherein said process comprising mixing 8 to 45 wt. % of an acid neutralizing compound with 10 to 90 wt. % of a compound incapacitating V2O5 and 1 to 12 wt. % of a combustion improver, the wt.% being based upon the weight of the composition.

The present invention provides a multi metal dispersion composition comprising:
5 to 10 wt. % of an acid neutralizing compound;
5 to 50 wt. % of a compound incapacitating V2O5;
1 to 5 wt. % of a combustion improver;
10 to 30 wt. % of a dispersant; and
10 to 60 wt. % of an organic medium, the wt. % being based upon the weight of the multi metal dispersion composition.

Another embodiment of the present invention provides a multi metal dispersion composition, wherein the multi metal dispersion composition has a particle size distribution of D10 = 50 nm; D50 = 120 nm; and D90 = 250 nm.

Another embodiment of the present invention provides a multi metal dispersion composition, wherein the dispersant is polymeric dispersants. Further the polymeric dispersant comprises polyisobutylene structure having reactive species substituted thereupon. The reactive species is selected from the group comprising of N-substituted alkenylsuccinimides, N-substituted alkenylsuccinamides and amines. The polymeric dispersant has average molecular weight of the polyisobutylene in the range of 600 to 3000. The polymeric dispersant has viscosity in the range of 150cSt to 4500 cSt at 100 ?C.

Another embodiment of the present invention provides a multi metal dispersion composition, wherein the organic medium has viscosity in the range of 1 cSt to 40 cSt at 100 ?C. The organic medium is selected from a group comprising polyalphaolefins, oils having aromatic character, esters and mixtures thereof. The organic medium is a mixture comprising two or more of polyalphaolefins, oils having aromatic character and esters, wherein the viscosity of each individual ingredient is in the range of 1 cSt to 100 cSt at 40 ?C. The esters are obtained from Group V base oil (as per API base oil definition). The polyalphaolefins are generated from monomers selected from the group comprising of 1-octene, 1-decene and 1-dodecene. The oils having aromatic character are selected from the group comprising of diesel oil, kerosene, linear alkylated benzenes and heavy alkylated benzenes.

Another embodiment of the present invention provides a multi metal dispersion composition, wherein the acid neutralizing compound is selected from the group comprising of oxide, hydroxide, acetate, carbonate, bicarbonate, phosphate, napthenate, tartarate, stearate, oleate, palmitate, salicylate, phenate, sulphonate of alkali and alkaline earth metal. The alkali and alkaline earth metal is selected from the group comprising of sodium, potassium, lithium, calcium, magnesium, barium, and strontium. More particularly, the acid neutralizing compound is calcium compound and/or magnesium compound and is selected from the group comprising of calcium oxide, calcium hydroxide, calcium carbonate, calcium acetate, magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium acetate, calcium stearate, calcium palmitate, calcium oleate, calcium sulphonate, magnesium phenate, magnesium stearate, magnesium oleate, magnesium palmitate, and magnesium sulphonate.

Another embodiment of the present invention provides a multi metal dispersion composition, wherein the compound incapacitating V2O5 is selected from the group comprising of magnesium oxide, magnesium hydroxide, and magnesium carbonate. In one of the preferred embodiment the compoundincapacitating V2O5 is magnesium oxide.

Another embodiment of the present invention provides a multi metal dispersion composition, wherein the combustion improver is selected from the group comprising of ferric oxide, ferric acetate, and ferric acetylacetonate.

The present invention also provides aprocess for preparing a multi metal dispersion, said process comprising mixing 5 to 10 wt. % of an acid neutralizing compound; with 5 to 50 wt. % of a compound incapacitating V2O5; 1 to 5 wt. % of a combustion improver; 10 to 30 wt. % of a dispersant; and 10 to 60 wt. % of an organic medium, the wt. % being based upon the weight of the multi metal dispersion composition.

The present invention provides afuel mixture comprising:
a hydrocarbon fuel; and
a multi metal dispersion composition in the range of 580 to 1330 ppm; the multi metal dispersion comprising:
5 to 10 wt. % of an acid neutralizing compound;
5 to 50 wt. % of a compound incapacitating V2O5;
1 to 5 wt. % of a combustion improver;
10 to 30 wt. % of a dispersant; and
10 to 60 wt. % of an organic medium, the wt. % being based upon the weight of the multi metal dispersion composition.

Another embodiment of the present invention provides a fuel mixture, wherein the hydrocarbon fuel is selected from the group comprising of liquid hydrocarbon fuel meeting IS: 1593 specifications. In one of the preferred embodiment, the hydrocarbon fuel is an oil used for industrial application in furnace.

The present invention also provides aprocess for preparing a fuel mixture, wherein said process comprising of blending a multi metal dispersion composition to a hydrocarbon fuel in the range of 580 to 1330 ppm, the multi metal dispersion comprising:
5 to 10 wt. % of an acid neutralizing compound;
5 to 50 wt. % of a compound incapacitating V2O5;
1 to 5 wt. % of a combustion improver;
10 to 30 wt. % of a dispersant; and
10 to 60 wt. % of an organic medium, the wt. % being based upon the weight of the multi metal dispersion composition.

In one of the embodiments of the invention, a series of dispersions containing basic compounds (magnesium oxide & calcium hydroxide), an organic medium and a surfactant are prepared from a slurry comprising 30 wt % to 50 wt % of the basic compounds, 10 wt % to 25 wt % of a surfactant and balance being hydrocarbon fluid, preferably low viscosity mineral oil.
The following examples are illustrative of the invention but not to be construed to limit the scope of the present invention.
Examples
The following Table 1 discloses the examples 1-9 for multi metal dispersion composition. Tests have been conducted for Stability, Cost Effectiveness, Processability, and Newtonian Behavior of these examples 1-9 and their results are tabulated in below table 1.

Table 1
Specification Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 Ex. 7 Ex. 8 Ex. 9
% Acid neutralization compound 6 5 8 14 5 9 5 5 6
% Compound incapacitating V2O5 34 40 30 45 55 47 40 40 34
% Combustion improver 1 2 3 2 2 7 2 2 1
% Dispersant 25 25 25 25 25 25 5 35 7
% Hydrocarbon 34 28 34 14 13 12 48 18 52
Stable for 1 Month Pass Pass Pass Fail Fail Fail Fail Pass Fail
Cost Effectiveness Pass Pass Pass Pass Fail Pass Pass Fail Pass
Processability Pass Pass Pass Pass Pass Pass Pass Pass Pass
Newtonian Behavior Pass Pass Pass Fail Fail Fail Pass Fail Pass
Overall remark Pass Pass Pass Fail Fail Fail Fail Fail Fail

Particle Size Distribution of multi metal dispersion composition
The tables 2-4 show the particle size distribution of example 1 of table 1. The multi metal dispersion composition of example 1 contains 6 wt. % of Calcium Hydroxide, 34 wt. % of Magnesium Oxide, 1 wt. % Iron Oxide, 25 wt. % Polyisobutylene succinimide, and 34 wt. % of Linear Alkylated Benzenes.
5 kg of the slurry or multi metal dispersion composition as given in example 1 is milled in a combination of horizontal & vertical bead mill with a milling chamber of suitable size appropriate for the scale of the operation. The bead size filling the chamber (typically 70 vol. %) is typically in the range 0.1 mm to 1 mm diameter (e.g. 0.3 mm+/-0.05 mm beads). The milling with 1 mm bead is done first followed with sequential milling with 0.5 mm bead & 0.1 mm bead. After a suitable amount of milling, typically 4 to 20 minutes residence time (i.e. the actual time the dispersion spends in the mill) the required particle size is achieved (i.e. ?100 nm) as determined by Particle Size Analyzer. The dispersion is easy to pour and stable for several weeks between 20° C. and +60° C., showing no tendency to stratify or to form a gel. The particle size distribution of multi metal dispersion composition (example 1) are measured and tabulated in table 2.
Table 2

S. No. Sample % of Particles less than 50 nm % of Particles less than 100 nm % of Particles less than
200 nm % of Particles less than
300 nm % of Particles less than
500 nm % of Particles less than 1000 nm
1 Processing with 1 mm bead 9 42 59 67 85 95
2 Processing with 0.3 mm bead 51 67 85 95 100 100
3 Processing with 0.1 mm bead 76 92 100 100 100 100

Further the particle size distribution of multi metal dispersion compositions for D10, D50 and D90 have been studied and tabulated in table 3.

Table 3
S. No. Sample D10 is = (nm) D50 is = (nm) D90 is =(nm)
1 Processing with 1 mm bead 50 154 652
2 Processing with 0.3 mm bead 20 38 149
3 Processing with 0.1 mm bead 12 25 100

Test for stability and Newtonian behavior have been conducted to determine the effect of D10, D50 & D90 of the example 1 (MMD composition). Following table 4 illustrates the results obtained in connection with D10, D50 & D90 of the example 1. The test results indicate the compositional stability of the multimetal nanodispersion in Fuel matrix.
Table 4

S. No. Composition D10 (nm) D50 (nm) D90 (nm) Stability of Dispersion Newtonian Behavior Overall Remark
1 Example 1 = 12 = 25 = 100 Stable Newtonian Pass
2 Example 1 = 50 = 120 = 250 Stable Newtonian Pass
3 Example 1 = 50 = 150 > 650 Unstable Non-Newtonian Fail
4 Example 1 >50 >150 >650 Unstable Non-Newtonian Fail

Particle Size Distribution of compositions containing three compounds
Test for stability and Newtonian behavior have been conducted to determine the effect of D10, D50 & D90 of the composition containing three compounds, which is the combination of an acid neutralizing compound, a compound incapacitating V2O5, and a combustion improver of the example 2 of the table 1. Following table 5 illustrates the results obtained in connection with D10, D50 & D90 of the composition of example 2. The test results indicate the compositional stability of the mixture of three compounds.
Table 5

S. No. Composition D10 (nm) D50 (nm) D90 (nm) Stability of dispersion Newtonian Behavior Overall Remark
1 Example 2 = 12 = 25 = 100 stable Newtonian Pass
2 Example 2 = 50 =120 = 250 stable Newtonian Pass
3 Example 2 = 50 = 150 > 650 unstable Non-Newtonian Fail
4 Example 2 >50 >150 >650 unstable Non-Newtonian Fail

Test results for fuel mixture
According to one embodiment of the invention the residual fuel oil contains around 2.3% S. The prepared dispersion is blended with fuel oil in the range of 100-200 ppm.
Analysis has been done with this embodiment of the present invention. Additive compositions have been prepared from the compounds of Magnesium & Calcium. Four blend samples were made for analysis from such additive with different concentration (0, 180 ppm, 300 ppm & 380 ppm respectively for sample A, B, C & D). Around 1g of the each sample blends along with about 20g of water/ buffer were kept in a high pressure reactor at 165 ?C at 200 bar for 48 hours. Excess oxygen content conditions were maintained so that active S components can be converted into H2SO4.
The residues obtained thereafter for each sample were washed with excess water/ buffer & were quantitatively evaluated for SO4 content. For each of the samples no other form of S based anionic peak was noticed in the chromatogram which thereby indicates the complete conversion into sulfate anion for all the experiments.
For the four samples different contents of Sulphate (in ppm) have been measured, as tabulated below in table 6:
Table 6
Sr. No. Sample Additive concentration (ppm) SO42- content (ppm)
1 A 0 977
2 B 180 1817
3 C 300 1940
4 D 380 2685

Results obtained from the experiments have indicated the effective neutralization of the acidic gases & transfer of the neutralized product to water phase by the invented nano additive.
Also, the removal of sulphate ion from the flue gas is directly proportional to the amount of basic metallic compound present in the oil phase.
The additive disclosed in the present invention demonstrates achievable SO3 emissions utilizing a high pressure reactor assembly for a fuel oil which contains sulfur. Further, the technology does not involve any additional other mitigation equipment. Benefits of this application of high activity magnesia in oil include catalyst protection and less frequent and easier cleanup of downstream equipment. No additional further infrastructure is required for dosing & removing respectively as active moieties are being inserted in liquid phase (hydrocarbon oil) & acidic components are also being removed in the liquid phase (water).
Another embodiment of the present invention relates to fuel mixture in which multi metal dispersion is blended with fuel oil in the range of 580 to 1330 ppm.
The following Table 7 discloses the samples for fuel mixtures. Test for V2O5 incapacitate, Acid Neutralization and Ash Deposition for various samples of fuel mixture have been conducted and their test results have been tabulated in below table 7.

Table 7
Sample Details S (%)
in FO V (ppm)
in FO Ca
(ppm) Mg
(ppm) Fe
(ppm) V incapa.
(%) Acid
Neutralization (%) Ash Deposit
(<0.1%) Overall Rating
FO 1.3 22 0 0 0 Fail Fail Pass Fail
FO + MMD (10 ppm) 1.2999 21.99 0.2 1.6 0.01 Fail Fail Pass Fail
FO + MMD (35 ppm) 1.2999 21.99 1.2 7.8 0.01 Fail Fail Pass Fail
FO + MMD (590 ppm) 1.2992 21.99 19.91 120.36 2.01 Pass Pass Pass Pass
FO + MMD (734 ppm) 1.2990 21.98 24.77 149.73 2.49 Pass Pass Pass Pass
FO + MMD (883 ppm) 1.2988 21.98 29.80 180.13 3.00 Pass Pass Pass Pass
FO + MMD (1324 ppm) 1.2982 21.97 44.68 270.09 4.50 Pass Pass Pass Pass
FO + MMD (1765 ppm) 1.2977 21.96 59.56 360.06 6.00 Pass Pass Fail Fail
FO + MMD (2354 ppm) 1.2969 21.95 79.44 480.21 8.00 Pass Pass Fail Fail

Wherein,
FO = Fuel Oil
MMD = Multi Metal Dispersion
,CLAIMS:We Claim:

1. A composition comprising:
8 to 45 wt. % of an acid neutralizing compound;
10 to 90 wt. % of a compound incapacitating V2O5; and
1 to 12 wt. % of a combustion improver, the wt. % being based upon the weight of the composition.

2. The composition as claimed in claim 1, wherein the composition has a particle size distribution of D10 = 50 nm; D50 = 120 nm; and D90 = 250 nm.

3. The composition as claimed in claim 1, wherein the acid neutralizing compound is selected from the group comprising of oxide, hydroxide, acetate, carbonate, bicarbonate, phosphate, naphthenate, tartarate, stearate, oleate, palmitate, salicylate, phenate, sulphonate of alkali and alkaline earth metal.

4. The composition as claimed in claim 3, wherein the alkali and alkaline earth metal is selected from the group comprising of sodium, potassium, lithium, calcium, magnesium, barium, and strontium.

5. The composition as claimed in claim 1, wherein the acid neutralizing compound is calcium compound and/or magnesium compound and is selected from the group comprising of calcium oxide, calcium hydroxide, calcium carbonate, calcium acetate, magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium acetate, calcium stearate, calcium palmitate, calcium oleate, calcium sulphonate, magnesium phenate, magnesium stearate, magnesium oleate, magnesium palmitate, and magnesium sulphonate.

6. The composition as claimed in claim 1, wherein the compound incapacitating V2O5 is selected from the group comprising of magnesium oxide, magnesium hydroxide, and magnesium carbonate.

7. The composition as claimed in claim 1, wherein the compound incapacitating V2O5 is magnesium oxide.

8. The composition as claimed in claim 1, wherein the combustion improver is selected from the group comprising of ferric oxide, ferric acetate, and ferric acetylacetonate.

9. A process for preparing a composition, wherein said process comprising mixing 8 to 45 wt. % of an acid neutralizing compound with 10 to 90 wt. % of a compound incapacitating V2O5 and 1 to 12 wt. % of a combustion improver, the wt.% being based upon the weight of the composition.

10. A multi metal dispersion composition comprising:
5 to 10 wt. % of an acid neutralizing compound;
5 to 50 wt. % of a compound incapacitating V2O5;
1 to 5 wt. % of a combustion improver;
10 to 30 wt. % of a dispersant; and
10 to 60 wt. % of an organic medium, the wt. % being based upon the weight of the multi metal dispersion composition.

11. The multi metal dispersion composition as claimed in claim 10, wherein the multi metal dispersion composition has a particle size distribution of D10 = 50 nm; D50 = 120 nm; and D90 = 250 nm.

12. The multi metal dispersion composition as claimed in claim 10, wherein the dispersant is polymeric dispersants.

13. The multi metal dispersion composition as claimed in claim 12, wherein the polymeric dispersant comprises polyisobutylene structure having reactive species substituted thereupon.

14. The multi metal dispersion composition as claimed in claim 13, wherein the reactive species is selected from the group comprising of N-substituted alkenylsuccinimides, N-substituted alkenylsuccinamides and amines.

15. The multi metal dispersion composition as claimed in claim 12, wherein the polymeric dispersant has average molecular weight of the polyisobutylene in the range of 600 to 3000.

16. The multi metal dispersion composition as claimed in claim 12, wherein the polymeric dispersant has viscosity in the range of 150cSt to 4500 cSt at 100 ?C.

17. The multi metal dispersion composition as claimed in claim 10, wherein the organic medium has viscosity in the range of 1 cSt to 40 cSt at 100 ?C.

18. The multi metal dispersion composition as claimed in claim 10, wherein the organic medium is selected from a group comprising polyalphaolefins, oils having aromatic character, esters and mixtures thereof.

19. The multi metal dispersion composition as claimed in claim 18, wherein the organic medium is a mixture comprising two or more of polyalphaolefins, oils having aromatic character and esters, wherein the viscosity of each individual ingredient is in the range of 1 cSt to 100 cSt at 40 ?C.

20. The multi metal dispersion composition as claimed in claim 18, wherein the esters are obtained from Group V base oil (as per API base oil definition).

21. The multi metal dispersion composition as claimed in claim 18, wherein the polyalphaolefins are generated from monomers selected from the group comprising of 1-octene, 1-decene and 1-dodecene.

22. The multi metal dispersion composition as claimed in claim 18, wherein the oils having aromatic character are selected from the group comprising of diesel oil, kerosene, linear alkylated benzenes and heavy alkylated benzenes.

23. The multi metal dispersion composition as claimed in claim 10, wherein the acid neutralizing compound is selected from the group comprising of oxide, hydroxide, acetate, carbonate, bicarbonate, phosphate, napthenate, tartarate, stearate, oleate, palmitate, salicylate, phenate, sulphonate of alkali and alkaline earth metal.

24. The multi metal dispersion composition as claimed in claim 23, wherein the alkali and alkaline earth metal is selected from the group comprising of sodium, potassium, lithium, calcium, magnesium, barium, and strontium.

25. The multi metal dispersion composition as claimed in claim 10, wherein the acid neutralizing compound is calcium compound and/or magnesium compound and is selected from the group comprising of calcium oxide, calcium hydroxide, calcium carbonate, calcium acetate, magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium acetate, calcium stearate, calcium palmitate, calcium oleate, calcium sulphonate, magnesium phenate, magnesium stearate, magnesium oleate, magnesium palmitate, and magnesium sulphonate.

26. The multi metal dispersion composition as claimed in claim 10, wherein the compound incapacitating V2O5 is selected from the group comprising of magnesium oxide, magnesium hydroxide, and magnesium carbonate.

27. The multi metal dispersion composition as claimed in claim 10, wherein the compound incapacitating V2O5 is magnesium oxide.

28. The multi metal dispersion composition as claimed in claim 10, wherein the combustion improver is selected from the group comprising of ferric oxide, ferric acetate, and ferric acetylacetonate.

29. A process for preparing a multi metal dispersion, said process comprising mixing 5 to 10 wt. % of an acid neutralizing compound; with 5 to 50 wt. % of a compound incapacitating V2O5; 1 to 5 wt. % of a combustion improver; 10 to 30 wt. % of a dispersant; and 10 to 60 wt. % of an organic medium, the wt. % being based upon the weight of the multi metal dispersion composition.

30. A fuel mixture comprising:
a hydrocarbon fuel; and
a multi metal dispersion composition in the range of 580 to 1330 ppm; the multi metal dispersion comprising:
5 to 10 wt. % of an acid neutralizing compound;
5 to 50 wt. % of a compound incapacitating V2O5;
1 to 5 wt. % of a combustion improver;
10 to 30 wt. % of a dispersant; and
10 to 60 wt. % of an organic medium, the wt. % being based upon the weight of the multi metal dispersion composition.

31. The fuel mixture as claimed in claim 30, wherein the hydrocarbon fuel is selected from the group comprising of liquid hydrocarbon fuel meeting IS: 1593 specifications.

32. The fuel mixture as claimed in claim 30, wherein the hydrocarbon fuel is an oil used for industrial application in furnace.

33. A process for preparing a fuel mixture, wherein said process comprising of blending a multi metal dispersion composition to a hydrocarbon fuel in the range of 580 to 1330 ppm, the multi metal dispersion comprising:
5 to 10 wt. % of an acid neutralizing compound;
5 to 50 wt. % of a compound incapacitating V2O5;
1 to 5 wt. % of a combustion improver;
10 to 30 wt. % of a dispersant; and
10 to 60 wt. % of an organic medium, the wt. % being based upon the weight of the multi metal dispersion composition.