Global to push GA events into
skip to main content

Title: Hydrogen-selective membrane

A hydrogen-selective membrane comprises a tubular porous ceramic support having a palladium metal layer deposited on an inside surface of the ceramic support. The thickness of the palladium layer is greater than about 10 {micro}m but typically less than about 20 {micro}m. The hydrogen permeation rate of the membrane is greater than about 1.0 moles/m{sup 2}s at a temperature of greater than about 500 C and a transmembrane pressure difference of about 1,500 kPa. Moreover, the hydrogen-to-nitrogen selectivity is greater than about 600 at a temperature of greater than about 500 C and a transmembrane pressure of about 700 kPa. Hydrogen can be separated from a mixture of gases using the membrane. The method may include the step of heating the mixture of gases to a temperature of greater than about 400 C and less than about 1000 C before the step of flowing the mixture of gases past the membrane. The mixture of gases may include ammonia. The ammonia typically is decomposed to provide nitrogen and hydrogen using a catalyst such as nickel. The catalyst may be placed inside the tubular ceramic support. The mixture of gases may be supplied by an industrial process such as the mixture ofmore » exhaust gases from the IGCC process. 9 figs.« less
Inventors:
;
Issue Date:
OSTI Identifier:
106702
Assignee:
Oregon State Univ., Corvallis, OR (United States) NETL; SCA: 080100; 010800; 200202; PA: EDB-95:134481; SN: 95001461646
Patent Number(s):
US 5,451,386/A/
Application Number:
PAN: 8-064,513
Contract Number:
AC21-89MC26373
Resource Relation:
Other Information: PBD: 19 Sep 1995
Research Org:
SRI International Inc
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN FUEL; 01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; MEMBRANES; DESIGN; HYDROGEN; MEMBRANE TRANSPORT; MATERIALS RECOVERY; EXHAUST GASES; TUBES; POROUS MATERIALS; AMMONIA; DECOMPOSITION; COAL GASIFICATION PLANTS; COMBINED-CYCLE POWER PLANTS