Journal
ACS OMEGA
Volume 7, Issue 8, Pages 6721-6727Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.1c06215
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Funding
- National Natural Science Foundation of China [21968009, 21868012, 21766010]
- International Science and Technology Cooperation Program of China [2015DFA50190]
- Jiangxi Provincial Department of Science and Technology [20171BCB24005]
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In this paper, the synthesized SSZ-13 zeolite membrane was treated with heated sodium chloride instead of calcination in air. The surface modification of the membrane by heated NaCl improved the gas separation selectivity.
Hydrothermal synthesis with an organic template of N,N,N trimethyl-1-adamantammonium hydroxide (TMAdaOH) is the most commonly used method to prepare an SSZ-13 zeolite membrane. In this paper, the synthesized membrane was treated in heated sodium chloride to remove TMAdaOH instead of calcination in air. The surface of the membrane was modified by the heated NaCl and resulted in an improved CO2/CH4 gas separation selectivity. TMAda(+) in the channels of SSZ-13 zeolite decomposed completely, and the treatment time was shortened significantly compared with calcination in air. The recrystallization of zeolite reacting with heated NaCl was the possible reason for the improved gas separation performance of the membrane.
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