Nowadays carbon dioxide is regarded as one of the main greenhouse gases in the environment and is produced by burning of fossil fuels and automobiles exhaust [1-2]. Global warming resulting from the emission of greenhouse gases, especially CO2, has become a widespread concern in the recent years.Various technologies were developed to capture the atmospheric CO2. In this context, adsorption is one of the best processes for the capture of CO2 and it can be carried out by the either physical adsorption or chemical adsorption [3]. For adsorption, in addition to physical adsorbents, various mesoporous solid adsorbents impregnated with polyamines are reviewed in this work. These materials are nontoxic, inexpensive and mesoporous with reasonably good surface area [4-5]. But the selectivity is poor and have an opportunity for surface modification. Surface modifications with amine functionalized materials have greater ability for the capture of CO2. In general, porous materials are widely applicable for CO2 adsorption due to their high surface area and easily susceptible nature for the surface modification by amine functional groups [6-10]. The main objective of this workpresented is to develop a Nano porous solid adsorbent which can serve as a best adsorbent for CO2. Rice husk ash samples prepared at different temperatures under N2+steam atmospheres are impregnated with Mono Ethyl Amine (MEA), Di Ethyl Amine (DEA) and Poly Ethylene Imine (PEI) in 5, 10, 15, 20 and 25 wt.%. All these samples are subjected to Characterization studies and CO2 adsorption studies.