Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 415, Issue -, Pages 770-775Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2012.05.068
Keywords
SAPO-34 zeolite membranes; Monolith supports; CO2/CH4 separation
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Funding
- Shell Global Solutions
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SAPO-34 zeolite membrane synthesis was scaled up by preparing membranes on seven-channel monolith alumina supports. These monoliths have CO2 permeances and CO2/CH4 separations selectivities at 4.6 MPa feed pressure that were similar to SAPO-34 membranes on single channel supports. They also exhibited the same pressure dependence. SAPO-34 membrane preparation was improved by adding SAPO-34 seed crystals to the synthesis gel instead of placing seeds on the support surface. Membranes prepared by seeded-gel synthesis had higher CO2 permeances, higher CO2/CH4 separation selectivities, and smaller standard deviations for these values. Using seeded-gel synthesis also decreased the number of synthesis steps, but increased the amount of seeds needed by two orders of magnitude. (c) 2012 Published by Elsevier B.V.
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