Influence of H2S on the hydrogen flux of thin-film PdAgAu membranes

Niek de Nooijer, Julio Davalos Sanchez, Jon Melendez, E. Fernandez, David Alfredo Pacheco Tanaka, Martin van Sint Annaland, Fausto Gallucci (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Pd-based membranes have the potential to be used for hydrogen purification and production in membrane reactors. However, the presence of impurities in the feedstock, such as H2S can poison the membrane, thus decreasing the hydrogen permeation by blocking and deactivating active sites of the Pd-alloy on the membrane surface. H2S at high concentrations can even destroy the membrane by the formation of Pd4S. It is known that alloying of Pd with Au enhances the membrane resistance to H2S. This work reports the performance of six PdAgAu/Al2O3 supported membranes, prepared by electroless plating combined with PVD under exposure to trace amounts (<2 ppm) of H2S. The Au content shows not to play a significant role at these low concentrations. Exposure results suggest a dual influence of physisorbed H2S and chemisorbed S species. A Langmuir description shows that the influence of the partial pressure of hydrogen is negligible on the flux inhibition. In the post characterization the absence of Pd4S was shown, however the surface was affected by the exposure to H2S.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusE-pub ahead of print - 1 Jan 2019

Fingerprint

Fluxes
membranes
Membranes
Thin films
Hydrogen
hydrogen
thin films
poisons
Electroless plating
Physical vapor deposition
plating
Alloying
purification
Permeation
Partial pressure
Feedstocks
alloying
Purification
partial pressure
low concentrations

Keywords

  • HS inhibition
  • Hydrogen production
  • Palladium-based membrane
  • Permeation

Cite this

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title = "Influence of H2S on the hydrogen flux of thin-film PdAgAu membranes",
abstract = "Pd-based membranes have the potential to be used for hydrogen purification and production in membrane reactors. However, the presence of impurities in the feedstock, such as H2S can poison the membrane, thus decreasing the hydrogen permeation by blocking and deactivating active sites of the Pd-alloy on the membrane surface. H2S at high concentrations can even destroy the membrane by the formation of Pd4S. It is known that alloying of Pd with Au enhances the membrane resistance to H2S. This work reports the performance of six PdAgAu/Al2O3 supported membranes, prepared by electroless plating combined with PVD under exposure to trace amounts (<2 ppm) of H2S. The Au content shows not to play a significant role at these low concentrations. Exposure results suggest a dual influence of physisorbed H2S and chemisorbed S species. A Langmuir description shows that the influence of the partial pressure of hydrogen is negligible on the flux inhibition. In the post characterization the absence of Pd4S was shown, however the surface was affected by the exposure to H2S.",
keywords = "HS inhibition, Hydrogen production, Palladium-based membrane, Permeation",
author = "{de Nooijer}, Niek and Sanchez, {Julio Davalos} and Jon Melendez and E. Fernandez and {Pacheco Tanaka}, {David Alfredo} and {van Sint Annaland}, Martin and Fausto Gallucci",
year = "2019",
month = "1",
day = "1",
doi = "10.1016/j.ijhydene.2019.06.194",
language = "English",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier",

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Influence of H2S on the hydrogen flux of thin-film PdAgAu membranes. / de Nooijer, Niek; Sanchez, Julio Davalos; Melendez, Jon; Fernandez, E.; Pacheco Tanaka, David Alfredo; van Sint Annaland, Martin; Gallucci, Fausto (Corresponding author).

In: International Journal of Hydrogen Energy, 01.01.2019.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Influence of H2S on the hydrogen flux of thin-film PdAgAu membranes

AU - de Nooijer, Niek

AU - Sanchez, Julio Davalos

AU - Melendez, Jon

AU - Fernandez, E.

AU - Pacheco Tanaka, David Alfredo

AU - van Sint Annaland, Martin

AU - Gallucci, Fausto

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Pd-based membranes have the potential to be used for hydrogen purification and production in membrane reactors. However, the presence of impurities in the feedstock, such as H2S can poison the membrane, thus decreasing the hydrogen permeation by blocking and deactivating active sites of the Pd-alloy on the membrane surface. H2S at high concentrations can even destroy the membrane by the formation of Pd4S. It is known that alloying of Pd with Au enhances the membrane resistance to H2S. This work reports the performance of six PdAgAu/Al2O3 supported membranes, prepared by electroless plating combined with PVD under exposure to trace amounts (<2 ppm) of H2S. The Au content shows not to play a significant role at these low concentrations. Exposure results suggest a dual influence of physisorbed H2S and chemisorbed S species. A Langmuir description shows that the influence of the partial pressure of hydrogen is negligible on the flux inhibition. In the post characterization the absence of Pd4S was shown, however the surface was affected by the exposure to H2S.

AB - Pd-based membranes have the potential to be used for hydrogen purification and production in membrane reactors. However, the presence of impurities in the feedstock, such as H2S can poison the membrane, thus decreasing the hydrogen permeation by blocking and deactivating active sites of the Pd-alloy on the membrane surface. H2S at high concentrations can even destroy the membrane by the formation of Pd4S. It is known that alloying of Pd with Au enhances the membrane resistance to H2S. This work reports the performance of six PdAgAu/Al2O3 supported membranes, prepared by electroless plating combined with PVD under exposure to trace amounts (<2 ppm) of H2S. The Au content shows not to play a significant role at these low concentrations. Exposure results suggest a dual influence of physisorbed H2S and chemisorbed S species. A Langmuir description shows that the influence of the partial pressure of hydrogen is negligible on the flux inhibition. In the post characterization the absence of Pd4S was shown, however the surface was affected by the exposure to H2S.

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