High CO₂ adsorption on improved ZSM-5 zeolite porous structure modified with ethylenediamine and desorption characteristics with microwave

Synthesized zeolite Socony Mobil-5 (ZSM-5) with large pore surface structures and modified with ethylenediamine were used to achieve high CO₂ adsorption capacity from the gas stream. The effect of alkali earth metals, granite, bentonite and starch on the porosity and crystallinity of zeolite has been studied. The prepared synthesized samples were characterized by SEM, EDX, XRD, N₂ adsorption/desorption, FT-IR and TGA. The maximum amine adsorption in synthesized zeolite obtained was 450 mg/g of zeolite. During the adsorption experiment, no drawback caused by filling the surface pores of zeolite was observed which indicates larger internal channels and well-distributed pores on the surface of synthesized zeolite. The highest CO₂ adsorption capacity obtained was 6.13 mmol/g of synthesized ZSM-5. Microwave energy was used to remove the adsorbed CO₂ for the effective reuse of the adsorbents. Desorption efficiency reached 100 % for the samples containing 70 and 50 % ethylenediamine after 9 and 13 min of microwave irritation, while the maximum desorption rate obtained was 60 % for the sample containing 10 % of ethylenediamine. The prepared synthesized sample in this study showed high amine adsorption results in higher CO₂ adsorption and complete desorption using microwave energy.