Hydrogen separation by ceramic membranes in coal gasification. Quarterly progress report, January 1, 1992--March 31, 1992

Technical Report · Thu Apr 30 00:00:00 EDT 1992

DOI:https://doi.org/10.2172/10114525· OSTI ID:10114525

Gavalas, G R

Project Objectives are to develop hydrogen-permselective ceramic membranes for water-gas shift membrane-reactor suitable for hydrogen production from coal gas and evaluate the technical and economic potential of the membrane-reactor. During the reporting period exploratory experiments begun on a membrane preparation technique aimed at providing higher membrane permeance. The new preparation technique involves two stages. The first stage is the formation of a layer of silica gel by a two-phase interfacial reaction within the pores of the substrate. The gel is then dried and calcined yielding a microporous (pore diameter below 10 {Angstrom}) silica layer within the pores of the substrate tube. The second stage involves one-sided chemical vapor deposition using the SiCl{sub 4}-H{sub 2}O reaction to close up the micropores of the gel layer and produce the final hydrogen permselective membrane. Chemical reactions involved are described.

• Research Organization: California Institute of Technology (CalTech), Pasadena, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-90MC26365
• OSTI ID: 10114525
• Report Number(s): DOE/MC/26365-3173; ON: DE93006198
• Resource Relation: Other Information: PBD: 30 Apr 1992
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
MEMBRANES
FABRICATION
HYDROGEN PRODUCTION
SILICON OXIDES
CHEMICAL VAPOR DEPOSITION
SILICON CHLORIDES
PROGRESS REPORT
COAL GASIFICATION
PERMEABILITY
CHEMICAL REACTION KINETICS
GELS
SEPARATION PROCESSES
080107
360201
010404
PREPARATION AND FABRICATION
GASIFICATION