Hydrogen separation by ceramic membranes in coal gasification

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

DOI:https://doi.org/10.2172/6913877· OSTI ID:6913877

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; USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-90MC26365
• OSTI ID: 6913877
• Report Number(s): DOE/MC/26365-3173; ON: DE93006198
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
HYDROGEN PRODUCTION
MEMBRANES
FABRICATION
SILICON CHLORIDES
CHEMICAL VAPOR DEPOSITION
SILICON OXIDES
CHEMICAL REACTION KINETICS
COAL GASIFICATION
GELS
PERMEABILITY
PROGRESS REPORT
SEPARATION PROCESSES
CHALCOGENIDES
CHEMICAL COATING
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
DEPOSITION
DISPERSIONS
DOCUMENT TYPES
GASIFICATION
HALIDES
HALOGEN COMPOUNDS
KINETICS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SILICON COMPOUNDS
SILICON HALIDES
SURFACE COATING
THERMOCHEMICAL PROCESSES
080107* - Hydrogen- Production- Coal Gasification
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication
010404 - Coal
Lignite
& Peat- Gasification