Claims:1. As claimed in claim 1, amine free Carbon Impregnated Nonwoven Filter Membranes for Indoor Air Purifiers ?
2. A system as claimed in claim 2, will use filtration of CO2 will be attained through adsorption technology and synthetic nanostructured carbon materials impregnated with an amine-free complex will be used as solid sorbents ?
3. A system as claimed in claim 3, consist metal complexes impregnated activated carbon technology will be developed by engineering optimal pore dimension of the carbon blended suitable matrix ?
4. As claimed in claim 4, usage of eco-friendly and non-hazardous filter membrane with high adsorption and high degree of stability ?
5. A method as claimed in claim 5, implementation nanocarbon with nanopores having high S/V ratio ?
6. A system as claimed in claim 6, demonstrates a highly potential sorbent with high CO2 adsorption capacity as well as low internal mass transfer resistance in order to attain fast desorption rate at room temperature. ?
7. A system as claimed in claim 7, relies on developing filter membrane that can be used in any closed habitable environment with cyclic occupancy, lacking proper ventilation and inadequate air exchange like school’s classrooms, offices, laboratories, cleanrooms, incubators, underground bunkers, submarines etc. ? , Description:Expected Outcome:?The outcome of the work will be attested with filter membranes having below mentioned advantages:
* Environmental-friendly and economical
* High adsorption efficiency
* Highly flexible membrane
* Easy regeneration
* High degree of stability

Diversity in application ?Origin of the proposal ?The amine leaking issues will be addressed by implementing non-amine-based carbon support impregnated with metal complexes as filter membranes for CO2 adsorption. The pore dimension of the carbon will be tailored appropriately for easy adsorption of CO2 molecule. Recent computational studies have shown that pore size less than 1 nm will exhibit superior CO2 capturing capacity. An efficient and potential sorbent should have high CO2 adsorption capacity as well as low internal mass transfer resistance in order to demonstrate fast desorption rate at room temperature. The phenomenon of adsorption/desorption of CO2 is dependent on textural properties of the sorbent material. Thus, nanocarbons with nanopores having high S/V ratio, will be a promising alternative to amine-based sorbent with similar or higher adsorption efficiency.

Importance of the proposed project in the context of current status
Majority of our work activity (80-90%) is restricted within a confined space/indoor environment, which lacks proper ventilation resulting in inadequate air exchange. Indoor air quality (IAQ) is a major concern to maintain national health. Among the various common indexes of IAQ (CO, formaldehyde, total volatile compounds, bacteria, particulates; PM2.5 and PM10), CO2 is a representative pollutant of IAQ, which is a by-product of human cellular metabolism. The indoor CO2 level of the occupant room is 100 times greater than the outer environment.
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?According to National Institute for Occupational Safety and Health (NIOSH), USA, concentration of CO2 above 1000 ppm (0.01%), results in sick building syndrome (SBS) (headaches, nose and throat ailments, tiredness, lack of concentration, and fatigue) (Fig.1). An immediate research on how to remove CO2 effectively and economically from indoor air has been becoming necessary.

Concept note of the technology/ business idea of the proposed idea
The fundamental idea lies on development of impregnated activated carbon-based filter membranes for CO2 removal via adsorption. Among the different contributors of air purifiers, filter membranes of cartridges take the lead role in determining the adsorption capacity of CO2 and thus have a strong impact on its performance (Scheme 1). Metal complexes impregnated activated carbon technology will be developed by engineering optimal pore dimensions of the carbon blended suitable matrix, so that the gas permeability, selectivity and adsorption capacity can be improved.

Conventional technologies for CO2 capture
General method used to purify polluted air includes adsorption, absorption, membrane and cryogenic gas cleaning techniques, Among, this adsorption is regarded as a promising method for controlling low concentration of CO2 because of its simplicity, low energy requirement and cost effectiveness.

Sorbent materials investigated
Physical and chemical adsorbents including conventional materials like zeolites, carbon-based sorbents, metal oxides, organic-inorganic hybrids like aluminosilicates as well as recent trendy materials like metal oxide frameworks (MOFs), porous polymer networks (PPNs), covalently organic frameworks (COFs) and amine appended MOFs, amine impregnated mesoporous silica and carbonaceous materials have been investigated. Among all these sorbents, MOFs exhibit comparatively higher CO2 adsorption capacity but are expensive than majority of the carbonaceous materials thus hindered from commercialization. Also, MOFs are water sensitive and chemisorb water, thus altering their porous structure. Whereas, carbonaceous adsorbents exhibit several advantages such as, higher resistance to water due to their hydrophobicity, higher thermal stability, good chemical resistance to both alkaline and acidic media, easy preparation, tunable pore structure, low energy requirement for regeneration, and most importantly, low cost. Thus, carbonaceous materials are considered to be one of the most promising adsorbents for CO2 capture.

Limitation of carbonaceous materials

Standalone carbonaceous materials are not a potential candidate for CO2 adsorption, thus the surface chemistry of carbon material is modified via oxidation, amination, bromination, sulfonation and metal impregnation. For acid gas capture, amination is expected to increase the CO2 adsorption capacity as it increases the basicity of the adsorbent. Unfortunately, amine-based scrubbing is highly susceptible towards oxidative and thermal degradation, thus amine leaking will be a threat. Emitted amines are unstable in the environment and the discharged amines may degrade to some dangerous substances that are toxic and represent a risk for cancer. One of the aldehydes that can be formed by amine degradation is formaldehyde which is genotoxic. The Norwegian Board of Health Supervision has set a threshold for formaldehyde in the indoor environment at 100 µg/m3.