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Indexed by:期刊论文

Date of Publication:2009-09-01

Journal:ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING

Included Journals:SCIE、EI、Scopus

Volume:4

Issue:5,SI

Page Number:666-671

ISSN No.:1932-2143

Key Words:zeolite SrA; adsorption; modification; hydrogen; methane

Abstract:To improve the adsorption capacity of zeolite A, two kinds of zeolite NaA with submicron and hierarchical structure were prepared. The XRD patterns indicated that both synthesized products were pure zeolite with LTA-type framework. The SEM images and laser particle size analysis showed that the particle size of submicron zeolite NaA was about 240 nm. The TEM and N(2) adsorption/desorption isotherms proved the existence of mesopores in the hierarchical zeolite NaA. The adsorption capacities of single component CH(4) or H(2) on zcolite SrA adsorbents, obtained by Sr(2+) ion-exchange of submicron and hierarchical zeolite NaA, and commercial zeolite 5A adsorbent were measured by the static volume method at 25 degrees C and pressures up to 1 MPa. The results show that both prepared zeolite SrA adsorbents have higher adsorption capacities of CH(4) and ideal separation factors of CH(4)/H(2) than commercial zeolite 5A, and the submicron zeolite SrA has the largest adsorption capacity of CH(4) and ideal separation factor of CH(4)/H(2). (c) 2009 Curtin University of Technology and John Wiley & Sons, Ltd.