Kurdistan University of Medical Sciences Journal of Advances in Environmental Health Research 2676-3478 5 2 2017 05 01 Improving CO2 adsorption with new amine-functionalized Y-type zeolite 70 77 51226 10.22102/jaehr.2017.71674. EN Majideh Babaei Department of Chemistry, Kerman branch, Islamic Azad University, Kerman, Iran Mansoor Anbia Professor, Research Laboratory of Nanoporous Materials, Faculty of Chemistry, Iran University of Science and Technology, Narmak, Tehran, Iran Maryam Kazemipour Department of Chemistry, Kerman branch, Islamic Azad University, Kerman, Iran Journal Article 2016 11 30 In this work, a new synthesized Y-type zeolite with an Si/Al molar ratio of 2.5 (NaY) was modified with amines, in order to probe the influence of the modification of the adsorbent’s surface on CO₂ adsorption. The three selected amines were diethanolamine, tetraethylenepentamine, and 2- methylaminoethanol. The surface nature of NaY was changed after amine modification, which causes a significant increase in the CO₂ adsorption capacity. The CO₂ adsorption capacity of the amine- modified NaY increased with temperature. The mechanism of CO₂ adsorption on NaY is usually a physical interaction, but it seems that after amine modification, chemical mechanism is the dominant mechanism for the chemical interaction between CO₂ and amine groups. The adsorbents were characterized by surface area and porosity analysis, X-ray diffraction, Fourier transform infrared spectroscopy, thermal gravimetric analysis, and scanning electron microscopy. The CO₂ adsorption capacity was measured by the volumetric method at 298 and 348 K. The CO₂ adsorption capacity of TEPA-NaY, DEA-NaY, and 2-MAE-NaY at 298 K was 60.63. The CO₂ adsorption capacity of TEPA- NaY, DEA-NaY, and 2-MAE-NaY at 348 K were 92.9, 78, and 85.42, respectively. These results showed that amine-functionalized NaY zeolites have excellent adsorption potential for CO₂ adsorption at high temperatures. https://jaehr.muk.ac.ir/article_51226_6f9c9e68ee7d43a6d1defdb4850c0f37.pdf