Document Type : Research Article
Authors
1
1 Faculty of Petrochemicals, Iran Polymer and Petrochemical Institute, Tehran, Iran 2 Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
2
Faculty of Petrochemicals, Iran Polymer and Petrochemical Institute, PO Box 14965/115, Tehran, Iran
3
Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, 15719-14911 Tehran, Iran
4
Department of Biomaterials, Iran Polymer and Petrochemical Institute, Tehran, Iran
5
Department of Chemical Engineering, Sahand University of Technology, Tabriz, Iran
6
Department of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
Abstract
In this paper, nanocrystals of zeolitic imidazolate frameworks (ZIF-8) were synthesized by solvothermal synthesis method, and their modification was conducted using molybdenum (Mo) promoter. The aforementioned modifications were carried out by two methods, including loading of Mo in ZIF-8 structure and also impregnation of ZIF-8 with Mo. Adsorption isotherms of CO2 and CH4 were determined according to the pressure decay method in the temperature and pressure ranges of 298-328 K and 1-4 bar, respectively. The obtained results indicate that presence of Mo promoter causes obvious changes in structural properties of the ZIF-8 nanocrystals, such as surface area, pores volumes, as well as, adsorption properties. Moreover, CO2 adsorption of the modified nanocrystals was obtained less than that of the parent ZIF-8. On the other hand, CO2/CH4 selectivity value of the modified ZIF-8 nanocrystals by impregnation has increased by 85% compared to non-modified ZIF-8.
Keywords
Main Subjects
)