Method for preparing defect-free DDR molecular sieve membrane
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United States of America
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Mar 22, 2022
Grant Date -
Dec 5, 2019
app pub date -
Jun 9, 2017
filing date -
Jun 9, 2017
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Abstract
Provided is a method for preparing a defect-free DDR molecular sieve membrane. Sigma-1 molecular sieve is used as an inducing seed crystal to prepare and obtain a continuous and compact DDR molecular sieve membrane on the surface of a porous ceramic support. An ozone atmosphere or an external field assisted technology is used to remove a template in the pores of the molecular sieve membrane at a low temperature. The invention avoids the formation of intercrystal defects and cracks, an activated DDR molecular sieve membrane has a good selectivity for separating CO2, and the membrane preparation time is significantly reduced.
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