Gas separation method and zeolite membrane
AssigneeNGK Insulators, Ltd.
InventorsKatsuya Shimizu, Makiko Ichikawa, Kenji Yajima
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Abstract
A gas separation method includes supplying a mixed gas to a zeolite membrane complex and permeating a high permeability gas through the zeolite membrane complex to separate the high permeability gas from other gases. The mixed gas includes a high permeability gas and a trace gas that is lower in concentration than the high permeability gas. The trace gas contains an organic substance whose molar concentration in the mixed gas is higher than or equal to 1.0 mol %. The adsorption equilibrium constant of the organic substance on the zeolite membrane is less than 150 times the adsorption equilibrium constant of the high permeability gas.
Claims6
A gas separation method of separating a mixed gas, the gas separation method comprising:
- a) preparing a zeolite membrane complex that includes a porous support and a zeolite membrane formed on said support;
- and
- b) supplying a mixed gas that includes a high permeability gas and a trace gas to said zeolite membrane complex, the trace gas being lower in concentration than said high permeability gas, and permeating said high permeability gas through said zeolite membrane complex to separate said high permeability gas from other gases,
- wherein said trace gas contains an organic substance whose molar concentration in said mixed gas is higher than or equal to 1.0 mol %, and
- an adsorption equilibrium constant of said organic substance on said zeolite membrane is less than 150 times an adsorption equilibrium constant of said high permeability gas on said zeolite membrane.
Dependencies are inferred from the claim text.