Effect of H2S on performance of Pd4Pt alloy membranes

Howard, B. H.; Morreale, B. D.

doi:10.1179/174892309X12519750237717

Effect of H2S on performance of Pd4Pt alloy membranes

Journal Article · Mon Dec 31 23:00:00 EST 2007 · Energy Materials

DOI:https://doi.org/10.1179/174892309X12519750237717· OSTI ID:1011233

Howard, B. H.; Morreale, B. D.

The effect of H2S on the performance of a hydrogen separation membrane with the composition Pd4Pt was evaluated at 350, 400 and 450°C. Exposure to hydrogen containing 1000 ppm H2S and 10%He resulted in two performance trends. At 350°C, a continuous decline in flux was observed which was attributed to the growth of sulphide corrosion on the membrane surface linked to surface contamination by stainless steel derived particles. At 400 and 450°C, the H2 flux decreased sharply followed by a slow recovery. This trend was attributed to Pt enrichment of the surface resulting from extraction of Pd through the formation of Pd4Pt. Also at 400 and 450°C, stainless steel based particle contamination was found to modify and/or enhance the corrosive effects of the H2S containing test gas. The implications of the metallic and/or metal sulphide surface contaminant effects are significant in that these contaminants could result in severe performance degradation and ultimately even mechanical failure.

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Research Organization:: National Energy Technology Laboratory, Morgantown WV and Pittsburgh, PA (United States)

Sponsoring Organization:: USDOE Assistant Secretary for Fossil Energy (FE-1)

OSTI ID:: 1011233

Report Number(s):: NETL-TPR--2431

Journal Information:: Energy Materials, Journal Name: Energy Materials Journal Issue: 3 Vol. 3; ISSN 1748-9237

Country of Publication:: United States

Language:: English

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Effect of H2S on performance of Pd4Pt alloy membranes

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