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Title: Hydrogen separation by ceramic membranes in coal gasification. Final report

Abstract

The general objective of this project was to develop hydrogen permselective membranes for hydrogen production from coal gas. The project consisted of the following tasks: (i) membrane preparation and characterization, (ii) membrane stability testing, and (iii) analysis and economic evaluation of a membrane-assisted ammonia from coal process. Several oxides (SiO{sub 2}, TiO{sub 2}, Al{sub 2}O{sub 3}, B{sub 2}O{sub 3}) in dense (or nonporous) form were identified to be permselective to hydrogen at elevated temperatures. To obtain reasonable permeance it is necessary that the membrane consists of a thin selective layer of the dense oxide supported on or within the pores of a porous support tube (or plate). Early in the project we chose porous Vycor tubes (5mm ID, 7 mm OD, 40 {Angstrom} mean pore diameter) supplied by Corning Inc. as the membrane support. To form the permselective layer (SiO{sub 2}, TiO{sub 2}, Al{sub 2}O{sub 3}, B{sub 2}O{sub 3}) we employed chemical vapor deposition using the reaction of the chloride (SiCl{sub 4}, etc.) vapor and water vapor at high temperatures. Deposition of the selective layer was carried out in a simple concentric tube reactor comprising the porous support tube surrounded by a wider concentric quartz tube and placed in anmore » electrically heated split tube furnace. In one deposition geometry (the opposing reactants or two-sided geometry) the chloride vapor in nitrogen carrier was passed through the inner tube while the water vapor also in nitrogen carrier was passed in the same direction through the annulus between the two tubes. In the other (two-sided) geometry the chloride-containing stream and the water-containing stream were both passed through the inner tube or both through the annulus.« less

Authors:
Publication Date:
Research Org.:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10179996
Report Number(s):
DOE/MC/26365-3423
ON: DE93000290
DOE Contract Number:  
AC21-90MC26365
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Aug 1993
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; HYDROGEN PRODUCTION; COAL GASIFICATION; MEMBRANES; CHEMICAL PREPARATION; SEPARATION PROCESSES; CERAMICS; AMMONIA; VYCOR; OXIDES; CHEMICAL VAPOR DEPOSITION; PERMEABILITY; SILICON OXIDES; PERFORMANCE TESTING; EVALUATION; PROGRESS REPORT; 080107; 400105; SEPARATION PROCEDURES

Citation Formats

Gavalas, G R. Hydrogen separation by ceramic membranes in coal gasification. Final report. United States: N. p., 1993. Web. doi:10.2172/10179996.
Gavalas, G R. Hydrogen separation by ceramic membranes in coal gasification. Final report. United States. https://doi.org/10.2172/10179996
Gavalas, G R. 1993. "Hydrogen separation by ceramic membranes in coal gasification. Final report". United States. https://doi.org/10.2172/10179996. https://www.osti.gov/servlets/purl/10179996.
@article{osti_10179996,
title = {Hydrogen separation by ceramic membranes in coal gasification. Final report},
author = {Gavalas, G R},
abstractNote = {The general objective of this project was to develop hydrogen permselective membranes for hydrogen production from coal gas. The project consisted of the following tasks: (i) membrane preparation and characterization, (ii) membrane stability testing, and (iii) analysis and economic evaluation of a membrane-assisted ammonia from coal process. Several oxides (SiO{sub 2}, TiO{sub 2}, Al{sub 2}O{sub 3}, B{sub 2}O{sub 3}) in dense (or nonporous) form were identified to be permselective to hydrogen at elevated temperatures. To obtain reasonable permeance it is necessary that the membrane consists of a thin selective layer of the dense oxide supported on or within the pores of a porous support tube (or plate). Early in the project we chose porous Vycor tubes (5mm ID, 7 mm OD, 40 {Angstrom} mean pore diameter) supplied by Corning Inc. as the membrane support. To form the permselective layer (SiO{sub 2}, TiO{sub 2}, Al{sub 2}O{sub 3}, B{sub 2}O{sub 3}) we employed chemical vapor deposition using the reaction of the chloride (SiCl{sub 4}, etc.) vapor and water vapor at high temperatures. Deposition of the selective layer was carried out in a simple concentric tube reactor comprising the porous support tube surrounded by a wider concentric quartz tube and placed in an electrically heated split tube furnace. In one deposition geometry (the opposing reactants or two-sided geometry) the chloride vapor in nitrogen carrier was passed through the inner tube while the water vapor also in nitrogen carrier was passed in the same direction through the annulus between the two tubes. In the other (two-sided) geometry the chloride-containing stream and the water-containing stream were both passed through the inner tube or both through the annulus.},
doi = {10.2172/10179996},
url = {https://www.osti.gov/biblio/10179996}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 1993},
month = {Sun Aug 01 00:00:00 EDT 1993}
}