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Synthesis and modification of zeolite NaA adsorbents for separation of hydrogen and methane
Author(s) -
Liu Yanna,
Xu Jingyang,
Jin Lijun,
Fang Yunming,
Hu Haoquan
Publication year - 2009
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.315
Subject(s) - zeolite , adsorption , mesoporous material , desorption , chemical engineering , ion exchange , particle size , chemistry , particle (ecology) , materials science , volume (thermodynamics) , inorganic chemistry , ion , organic chemistry , catalysis , oceanography , engineering , geology , physics , quantum mechanics
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 zeolite 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 °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 . Copyright © 2009 Curtin University of Technology and John Wiley & Sons, Ltd.