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Title: Fabrication and operational considerations of hydrogen permeable Mo2C/V metal membranes and improvement with application of Pd

Abstract

Mo2C has previously been demonstrated as an effective catalyst layer to enable stable H2 permeation through vanadium foils at high temperatures. Here, in this paper, this approach was extended to several group V metal foils (V, Nb, and Ta) as well as mixed gas testing. The best permeability was achieved with V, and an activation process was developed to recover the performance of V foils displaying evidence of oxidation. Nb foils yielded ~20% the permeability of V, while Ta was too brittle to operate effectively. Mo2C/V membranes were operated at feed conditions well above the ductile-to-brittle transition pressure without embrittlement; however, the H2 permeability of Mo2C/V membranes was significantly attenuated at lower temperatures (< 600 °C). H2 permeation was also severely inhibited by the presence of N2 or CO2 in mixed gas environments due to strong competitive adsorption. The addition of a Pd catalyst layer on top of Mo2C improved mixed gas stability and increased H2 permeability to 2 × 10-8 mol·m-1·s-1·Pa-0.5 at 500 °C for V based membranes. Lastly, as an interlayer, Mo2C was demonstrated to be a stable barrier preventing Pd-V interdiffusion at 500 °C while simultaneously allowing significant H2 permeation.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Colorado School of Mines, Golden, CO (United States). Department of Chemical and Biological Engineering
Publication Date:
Research Org.:
Colorado School of Mines, Golden, CO (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Nuclear Energy (NE)
Contributing Org.:
DOE Integrated University Program Graduate Fellowship; U.S. National Science Foundation
OSTI Identifier:
1457546
Alternate Identifier(s):
OSTI ID: 1548943
Grant/Contract Number:  
AR0000785; 1512172; 0000785
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Membrane Science
Additional Journal Information:
Journal Volume: 549; Journal Issue: C; Journal ID: ISSN 0376-7388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 08 HYDROGEN; Hydrogen purification; Group V metals; Carbide catalyst; Interdiffusion barrier; Mixed gas inhibition

Citation Formats

Fuerst, Thomas F., Zhang, Zhenyu, Hentges, Abigail M., Lundin, Sean-Thomas B., Wolden, Colin A., and Way, J. Douglas. Fabrication and operational considerations of hydrogen permeable Mo2C/V metal membranes and improvement with application of Pd. United States: N. p., 2017. Web. https://doi.org/10.1016/j.memsci.2017.12.030.
Fuerst, Thomas F., Zhang, Zhenyu, Hentges, Abigail M., Lundin, Sean-Thomas B., Wolden, Colin A., & Way, J. Douglas. Fabrication and operational considerations of hydrogen permeable Mo2C/V metal membranes and improvement with application of Pd. United States. https://doi.org/10.1016/j.memsci.2017.12.030
Fuerst, Thomas F., Zhang, Zhenyu, Hentges, Abigail M., Lundin, Sean-Thomas B., Wolden, Colin A., and Way, J. Douglas. Thu . "Fabrication and operational considerations of hydrogen permeable Mo2C/V metal membranes and improvement with application of Pd". United States. https://doi.org/10.1016/j.memsci.2017.12.030. https://www.osti.gov/servlets/purl/1457546.
@article{osti_1457546,
title = {Fabrication and operational considerations of hydrogen permeable Mo2C/V metal membranes and improvement with application of Pd},
author = {Fuerst, Thomas F. and Zhang, Zhenyu and Hentges, Abigail M. and Lundin, Sean-Thomas B. and Wolden, Colin A. and Way, J. Douglas},
abstractNote = {Mo2C has previously been demonstrated as an effective catalyst layer to enable stable H2 permeation through vanadium foils at high temperatures. Here, in this paper, this approach was extended to several group V metal foils (V, Nb, and Ta) as well as mixed gas testing. The best permeability was achieved with V, and an activation process was developed to recover the performance of V foils displaying evidence of oxidation. Nb foils yielded ~20% the permeability of V, while Ta was too brittle to operate effectively. Mo2C/V membranes were operated at feed conditions well above the ductile-to-brittle transition pressure without embrittlement; however, the H2 permeability of Mo2C/V membranes was significantly attenuated at lower temperatures (< 600 °C). H2 permeation was also severely inhibited by the presence of N2 or CO2 in mixed gas environments due to strong competitive adsorption. The addition of a Pd catalyst layer on top of Mo2C improved mixed gas stability and increased H2 permeability to 2 × 10-8 mol·m-1·s-1·Pa-0.5 at 500 °C for V based membranes. Lastly, as an interlayer, Mo2C was demonstrated to be a stable barrier preventing Pd-V interdiffusion at 500 °C while simultaneously allowing significant H2 permeation.},
doi = {10.1016/j.memsci.2017.12.030},
journal = {Journal of Membrane Science},
number = C,
volume = 549,
place = {United States},
year = {2017},
month = {12}
}

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