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Title: Hydrogen Permeability of Mulitphase V-Ti-Ni Metallic Membranes

Authors:
Publication Date:
Research Org.:
SRS
Sponsoring Org.:
USDOE
OSTI Identifier:
882694
Report Number(s):
WSRC-MS-2006-00091
DOE Contract Number:
DE-AC09-96SR1850
Resource Type:
Journal Article
Resource Relation:
Journal Name: unknown
Country of Publication:
United States
Language:
English

Citation Formats

ADAMS, THAD. Hydrogen Permeability of Mulitphase V-Ti-Ni Metallic Membranes. United States: N. p., 2006. Web.
ADAMS, THAD. Hydrogen Permeability of Mulitphase V-Ti-Ni Metallic Membranes. United States.
ADAMS, THAD. Tue . "Hydrogen Permeability of Mulitphase V-Ti-Ni Metallic Membranes". United States. doi:. https://www.osti.gov/servlets/purl/882694.
@article{osti_882694,
title = {Hydrogen Permeability of Mulitphase V-Ti-Ni Metallic Membranes},
author = {ADAMS, THAD},
abstractNote = {},
doi = {},
journal = {unknown},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 14 00:00:00 EST 2006},
month = {Tue Feb 14 00:00:00 EST 2006}
}
  • Development of advanced hydrogen separation membranes in support of hydrogen production processes such as coal gasification and as front end gas purifiers for fuel cell based system is paramount to the successful implementation of a national hydrogen economy. Current generation metallic hydrogen separation membranes are based on Pd-alloys. Although the technology has proven successful, at issue is the high cost of palladium. Evaluation of non-noble metal based dense metallic separation membranes is currently receiving national and international attention. The focal point of the reported work was to evaluate a Group 5A-Ta, Nb, V-based alloy with respect to microstructural features andmore » hydrogen permeability. Electrochemical hydrogen permeation testing of the V-Ti-Ni alloy is reported herein and compared to pure Pd measurements recorded as part of this same study. The V-Ti-Ni was demonstrated to have a steady state hydrogen permeation rate an order of magnitude higher than the pure Pd material in testing conducted at 22 C.« less
  • Development of advanced hydrogen separation membranes in support of hydrogen production processes such as coal gasification and as front end gas purifiers for fuel cell based system is paramount to the successful implementation of a national hydrogen economy. Current generation metallic hydrogen separation membranes are based on Pd-alloys. Although the technology has proven successful, at issue is the high cost of palladium. Evaluation of non-noble metal based dense metallic separation membranes is currently receiving national and international attention. The focal point of the reported work was to evaluate a Group 5A-Ta, Nb, V-based alloy with respect to microstructural features andmore » hydrogen permeability. Electrochemical hydrogen permeation testing of the V-Ti-Ni alloy is reported herein and compared to pure Pd measurements recorded as part of this same study. The V-Ti-Ni was demonstrated to have a steady state hydrogen permeation rate an order of magnitude higher than the pure Pd material in testing conducted at 22 C.« less
  • A potentially exciting material for membrane separations are metallic glass materials due to their low cost, high elastic toughness and resistance to hydrogen embrittlement as compared to crystalline Pd-based membrane systems. However, at elevated temperatures and extended operation times structural changes including partial crystallinity may appear in these amorphous metallic systems. This study reports on the investigation of time and temperature dependent crystalline phase formation in conjunction with in situ crystallization/hydrogen permeation experiments at elevated temperatures. At temperatures near 400 C a FeNi crystalline phase appears as 22 vol.% inside the host amorphous matrix and the resulting composite structure remainsmore » stable over 3 h at temperature. The hydrogen permeation at 400 C of the partially crystalline material is similar to the fully amorphous material near 5 x 10{sup -9} mol H{sub 2}/m s Pa{sup 1/2}, while ambient temperature electrochemical permeation at 25 C revealed an order of magnitude decrease in the permeation of partially crystalline materials due to differences in the amorphous versus crystalline phase activation energy for hydrogen permeation.« less