RT Journal Article
T1 Influence of H2S on the hydrogen flux of thin-film PdAgAu membranes
A1 de Nooijer, Niek
A1 Sanchez, Julio Davalos
A1 Melendez, Jon
A1 Fernandez, Ekain
A1 Pacheco Tanaka, David Alfredo
A1 van Sint Annaland, Martin
A1 Gallucci, Fausto
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.
SN 0360-3199
YR 2020
FD 2020-03-04
LK https://hdl.handle.net/11556/3327
UL https://hdl.handle.net/11556/3327
LA eng
NO de Nooijer , N , Sanchez , J D , Melendez , J , Fernandez , E , Pacheco Tanaka , D A , van Sint Annaland , M & Gallucci , F 2020 , ' Influence of H 2 S on the hydrogen flux of thin-film PdAgAu membranes ' , International Journal of Hydrogen Energy , vol. 45 , no. 12 , pp. 7303-7312 . https://doi.org/10.1016/j.ijhydene.2019.06.194
NO Publisher Copyright: © 2019 Hydrogen Energy Publications LLC
NO Image 1 This project has received funding from the Fuel Cells and Hydrogen 2 Joint Undertaking under grant agreement No 671459 (BIONICO). This Joint Undertaking receives support from the European Union's Horizon 2020 Research and Innovation Programme , Hydrogen Europe and N.ERGHY.
DS TECNALIA Publications
RD 1 sept 2024