期刊
ACS MATERIALS LETTERS
卷 1, 期 6, 页码 655-659出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsmaterialslett.9b00324
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资金
- National Science Foundation (CBET) [1835924]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1835924] Funding Source: National Science Foundation
Natural gas reservoirs are the most abundant source of helium, despite helium being present only in trace amounts. Membrane technology represents an appealing and potentially cost-effective approach to recover helium from natural gas, consisting mainly of methane. Herein, we demonstrate that chabazite zeolite SAPO-34 membranes can effectively separate equimolar helium/methane mixtures. SAPO-34 membranes displayed helium permeance as high as 2.28 x 10(-7) mol/(m(2) s Pa) and separation selectivity as high as 13.8 for He/CH4 mixtures. The separation of this binary mixture was favored through molecular sieving and diffusivity differences. The best SAPO-34 membrane surpassed the Robeson limit upper bound, making these membranes appealing for helium recovery from natural gas.
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