期刊
JOURNAL OF MEMBRANE SCIENCE
卷 352, 期 1-2, 页码 7-13出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2010.01.037
关键词
Gas separation; SAPO-34 membrane; Carbon dioxide/methane separation; Membrane preparation; Membrane scale-up
资金
- Shell Global Solutions
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1034710] Funding Source: National Science Foundation
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1034720] Funding Source: National Science Foundation
High flux SAPO-34 membranes on porous, tubular stainless steel supports with CO2/CH4 separation selectivities greater than 200 were scaled up from 5 cm length to 25 cm (a factor of 7.5 increase in membrane area). The preparation of the 25-cm membranes required a more dilute synthesis gel and shorter crystallization times to avoid excess build-up of zeolite crystals at the bottom of the membrane tubes. These changes yielded 25-cm membranes with similar permeances and selectivities to those of the 5-cm membranes. Aluminum sources, gel compositions, and synthesis procedures were systematically investigated to lower the membrane cost, optimize the separation performance, and obtain good reproducibility. The CO2 permeances of the 25-cm membranes were approximately 5 x 10(-7) mol/(m(2) s Pa) at 295 K for a feed pressure of 138 kPa and a 50/50 feed. (C) 2010 Elsevier B.V. All rights reserved.
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