Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
Patent
1997-09-24
1999-03-30
Spitzer, Robert
Gas separation: processes
Selective diffusion of gases
Selective diffusion of gases through substantially solid...
95 45, 95 55, 96 10, 96 11, B01D 5322, B01D 6306
Patent
active
058882731
ABSTRACT:
A high temperature membrane reactor or gas purification apparatus includes a housing containing a gas heating chamber and a gas extraction component, preferably one or more tubular membranes. The preferred application is for extracting hydrogen from a mixed gas flow or for generating hydrogen, e.g., by reforming methanol, ethanol, or gasoline. A surrounding annulus provides heat exchange and insulation by circulating the mixed gas flow about the housing and then injecting the mixed gas flow into the housing for extraction or reaction. The apparatus further includes an outlet for releasing raffinate preferably including a flow controlling restriction. Heating is provided by conducting the raffinate from the gas extraction component to the heating chamber wherein reaction with a catalyst generates heat. These features, alone or in combination, provide better energy management, better flow management, and better safety than current designs. A spring-type support for the membrane is further described which increases the maximum useable operation pressure of the membranes to take better advantage of the membrane reactor and gas purification features.
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