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Title: Hydrogen-selective membrane

Abstract

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 mixturemore » of exhaust gases from the IGCC process. 9 figs.« less

Inventors:
;
Issue Date:
Research Org.:
SRI International
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
516919
Patent Number(s):
5,652,020
Application Number:
PAN: 8-593,013
Assignee:
Oregon State Univ. , Corvallis, OR (United States) PTO; SCA: 080100; PA: EDB-97:115920; SN: 97001831596
DOE Contract Number:  
AC21-89MC26373
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 29 Jul 1997
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN FUEL; HYDROGEN; MEMBRANE TRANSPORT; MATERIALS RECOVERY; MEMBRANES; PALLADIUM; AMMONIA; NITROGEN; MIXTURES; EXHAUST GASES; COAL GASIFICATION; COMBINED-CYCLE POWER PLANTS; SEPARATION PROCESSES

Citation Formats

Collins, J.P., and Way, J.D. Hydrogen-selective membrane. United States: N. p., 1997. Web.
Collins, J.P., & Way, J.D. Hydrogen-selective membrane. United States.
Collins, J.P., and Way, J.D. Tue . "Hydrogen-selective membrane". United States.
@article{osti_516919,
title = {Hydrogen-selective membrane},
author = {Collins, J.P. and Way, J.D.},
abstractNote = {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 of exhaust gases from the IGCC process. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {7}
}