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PdCuAu ternary alloy membranes. Hydrogen permeation properties in the presence of H2S

Journal Article · · Journal of Membrane Science
 [1];  [1];  [1];  [2];  [2];  [1]
  1. Instituto de Investigaciones en Catalisis y Petroquimica (FIQ, UL-CONICET), Santa Fe (Argentina)
  2. Carnegie Mellon Univ., Pittsburgh, PA (United States); National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)
PdCuAu ternary alloy membranes with different component compositions were synthesized by sequential electroless deposition of components onto porous stainless steel substrates. The ternary with the highest Au content, Pd69Cu14Au17, exhibited the highest hydrogen permeation flux, comparable to that of a Pd91Au9 membrane. Upon exposure to 100 ppm H2S/H2 at 673 K for 24 h, all PdCuAu membranes experienced flux reductions of ~55%, followed by recovery to ~80% of the initial hydrogen flux upon reintroduction of pure hydrogen at 400 °C. Complete flux recovery after H2S exposure required hydrogen treatment at 500 °C. X-ray diffraction (XRD) analysis of the H2S-exposed PdCuAu membranes revealed fcc alloy structure with no evidence of bulk sulfide formation. In agreement with the XRD results, sulfur was not detected in the bulk of H2S-exposed samples by energy dispersive spectroscopy (EDS). However, analysis of H2S-exposed PdCuAu alloys by X-ray photoelectron spectroscopy (XPS) depth profiling revealed low, but measureable, amounts of sulfur in the near-surface region, about 10 nm in depth. The depth profiles of samples after hydrogen recovery treatment showed significantly reduced sulfur content. Furthermore, these results indicate that H2S exposure causes flux loss in PdCuAu alloys through a surface-poisoning mechanism, and that the surface sulfide can be removed—and flux recovered—by high temperature treatment in hydrogen.
Research Organization:
National Energy Technology Lab. (NETL), Albany, OR (United States)
Sponsoring Organization:
USDOE
OSTI ID:
1225783
Report Number(s):
A-UNIV-PUB--136
Journal Information:
Journal of Membrane Science, Journal Name: Journal of Membrane Science Journal Issue: C Vol. 479; ISSN 0376-7388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

References (25)

Surface composition of PdCuAu ternary alloys: a combined LEIS and XPS study: Surface composition of PdCuAu ternary alloys: a LEIS and XPS study journal May 2015
Effect of hydrogen-sulfide on the hydrogen permeance of palladium?copper alloys at elevated temperatures journal October 2004
Effect of H 2 S on the Performance and Long-Term Stability of Pd/Cu Membranes journal April 2009
Development of thin binary and ternary Pd-based alloy membranes for use in hydrogen production journal November 2011
Sulfur tolerant PdAu and PdAuPt alloy hydrogen separation membranes journal July 2012
Palladium and palladium alloy membranes for hydrogen separation and production: History, fabrication strategies, and current performance journal May 2010
Investigation of H2 and H2S Adsorption on Niobium- and Copper-Doped Palladium Surfaces journal September 2010
The effect of carbon monoxide and steam on the hydrogen permeability of a Pd/stainless steel membrane journal January 2000
Characterization of Intermetallic Diffusion Barrier and Alloy Formation for Pd/Cu and Pd/Ag Porous Stainless Steel Composite Membranes journal June 2004
Palladium–gold membranes in mixed gas streams with hydrogen sulfide: Effect of alloy content and fabrication technique journal August 2011
Catalysis in membrane reformers: a high-performance catalytic system for hydrogen production from methane journal April 2005
Predicting, Fabricating, and Permeability Testing of Free-Standing Ternary Palladium−Copper−Gold Membranes for Hydrogen Separation journal September 2010
Development of ternary Pd–Ag–TM alloy membranes with improved sulphur tolerance journal February 2013
Novel PdAgCu ternary alloy: Hydrogen permeation and surface properties journal May 2011
Modeling and performance assessment of Pd- and Pd/Au-based catalytic membrane reactors for hydrogen production journal January 2009
Inhibition of hydrogen transport through Pd and Pd47Cu53 membranes by H2S at 350°C journal March 2010
Pd-based binary and ternary alloy membranes: Morphological and perm-selective characterization in the presence of H2S journal January 2014
Evaluation of the water gas shift reaction in a palladium membrane reactor journal October 2010
Hydrogen permeability study of the thin Pd–Ag alloy membranes in the temperature range across the α–β phase transition journal October 2006
The effect of H2S on the performance of Pd and Pd/Au composite membrane journal October 2010
Dense inorganic membranes for production of hydrogen from methane and coal with carbon dioxide sequestration journal October 2006
Apparatus for deposition of composition spread alloy films: The rotatable shadow mask
  • Fleutot, Benoit; Miller, James B.; Gellman, Andrew J.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 30, Issue 6 https://doi.org/10.1116/1.4766194
journal November 2012
PdAu and PdAuAg composite membranes for hydrogen separation from synthetic water-gas shift streams containing hydrogen sulfide journal September 2014
Effects of thermal activation on hydrogen permeation properties of thin, self-supported Pd/Ag membranes journal August 2009
PdAgAu alloy with high resistance to corrosion by H2S journal December 2012

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