توضیحات :
Journal of Advances in Environmental Health Research
Volume 5, Issue 2, Spring 2017
Authors : Majideh Babaei, Mansoor Anbia, Maryam Kazemipour
Abstract :
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 CO۲ 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 CO۲ adsorption capacity. The CO۲ adsorption capacity of the amine- modified NaY increased with temperature. The mechanism of CO۲ 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 CO۲ 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 CO۲ adsorption capacity was measured by the volumetric method at 298 and 348 K. The CO۲ adsorption capacity of TEPA-NaY, DEA-NaY, and 2-MAE-NaY at 298 K was 60.63. The CO۲ 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 CO۲ adsorption at high temperatures.
Keyword : CO2 Adsorption, Y-Type Zeolite, amine modification, chemisorption, physisorption
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