Surface Segregation in a PdCu Alloy Hydrogen Separation Membrane
Abstract
Separation of hydrogen from mixed gas streams is an important step for hydrogen generation technologies, including hydrocarbon reforming and coal/biomass gasification. Dense palladium-based membranes have received significant attention for this application because of palladium’s ability to dissociatively adsorb molecular hydrogen at its surface for subsequent transport of hydrogen atoms through its bulk. Alloying palladium with minor components, like copper, has been shown to improve both the membrane’s structural characteristics and resistance to poisoning of its catalytic surface [1]. Surface segregation—a composition difference between the bulk material and its surface—is common in alloys and can affect important surface processes. Rational design of alloy membranes requires that surface segregation be understood, and possibly controlled. In this work, we examine surface segregation in a polycrystalline Pd70Cu30 hydrogen separation membrane as a function of thermal treatment and adsorption of hydrogen sulfide.
- Authors:
- Publication Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
- Sponsoring Org.:
- USDOE - Office of Fossil Energy (FE)
- OSTI Identifier:
- 915575
- Report Number(s):
- DOE/NETL-IR-2007-165
TRN: US200816%%85
- DOE Contract Number:
- None cited
- Resource Type:
- Conference
- Resource Relation:
- Conference: North American Catalysis Society 20th North American Meeting, Houston, TX, June 17-22, 2007
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 08 HYDROGEN; ADSORPTION; ALLOYS; ATOMS; CATALYSIS; COPPER; DESIGN; GASIFICATION; HYDROCARBONS; HYDROGEN; HYDROGEN SULFIDES; MEMBRANES; PALLADIUM; POISONING; SEGREGATION; TRANSPORT
Citation Formats
Miller, J B, Matranga, C S, and Gellman, A J. Surface Segregation in a PdCu Alloy Hydrogen Separation Membrane. United States: N. p., 2007.
Web.
Miller, J B, Matranga, C S, & Gellman, A J. Surface Segregation in a PdCu Alloy Hydrogen Separation Membrane. United States.
Miller, J B, Matranga, C S, and Gellman, A J. 2007.
"Surface Segregation in a PdCu Alloy Hydrogen Separation Membrane". United States. https://www.osti.gov/servlets/purl/915575.
@article{osti_915575,
title = {Surface Segregation in a PdCu Alloy Hydrogen Separation Membrane},
author = {Miller, J B and Matranga, C S and Gellman, A J},
abstractNote = {Separation of hydrogen from mixed gas streams is an important step for hydrogen generation technologies, including hydrocarbon reforming and coal/biomass gasification. Dense palladium-based membranes have received significant attention for this application because of palladium’s ability to dissociatively adsorb molecular hydrogen at its surface for subsequent transport of hydrogen atoms through its bulk. Alloying palladium with minor components, like copper, has been shown to improve both the membrane’s structural characteristics and resistance to poisoning of its catalytic surface [1]. Surface segregation—a composition difference between the bulk material and its surface—is common in alloys and can affect important surface processes. Rational design of alloy membranes requires that surface segregation be understood, and possibly controlled. In this work, we examine surface segregation in a polycrystalline Pd70Cu30 hydrogen separation membrane as a function of thermal treatment and adsorption of hydrogen sulfide.},
doi = {},
url = {https://www.osti.gov/biblio/915575},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2007},
month = {Fri Jun 01 00:00:00 EDT 2007}
}