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Artículo

Hydrogen permeation and surface properties of PdAu and PdAgAu membranes in the presence of CO, CO2 and H2S

Dalla Fontana, AgustinaIcon ; Sirini, Noelí EstefaníaIcon ; Cornaglia, Laura MariaIcon ; Tarditi, Ana MariaIcon
Fecha de publicación: 01/10/2018
Editorial: Elsevier Science
Revista: Journal of Membrane Science
ISSN: 0376-7388
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

Using the electroless deposition technique with different deposition sequences, it was possible to obtain a single phase PdAgAu ternary alloy after treatment at 773 K during 7 days. Despite the order of deposition, the samples exhibited similar hydrogen permeation flux at the same temperature and pressure. In the presence of CO, the PdAgAu ternary alloy membranes showed a lower inhibition on the hydrogen permeance compared with the binary PdAu alloy at 623 and 673 K. On the contrary, under CO2 containing streams, the ternary alloy showed a higher inhibition with a complete hydrogen recovery after removing CO2 from the stream. When H2S was introduced in the 13% CO2/13% Ar/74% H2 stream, a higher permeance decrease was observed on both the PdAu and PdAgAu alloy membranes. After removal of H2S, a hydrogen recovery of 60% and 76% was measured for the PdAu and PdAgAu membranes, respectively. Pd surface segregation was observed on the Pd82Ag15Au3–873 K-5 d and the Pd78Au6Ag16–773 K-7 d samples upon exposure to CO containing streams. Instead, silver surface segregation was observed by XPS after exposing the PdAgAu ternary alloy to CO2 containing streams.
Palabras clave: CO , CO2 , H2S , PALLADIUM MEMBRANE , TERNARY ALLOY
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/88486
DOI: https://doi.org/10.1016/j.memsci.2018.06.001
URL: https://www.sciencedirect.com/science/article/pii/S0376738817333513?via%3Dihub
Colecciones
Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Citación
Dalla Fontana, Agustina; Sirini, Noelí Estefanía; Cornaglia, Laura Maria; Tarditi, Ana Maria; Hydrogen permeation and surface properties of PdAu and PdAgAu membranes in the presence of CO, CO2 and H2S; Elsevier Science; Journal of Membrane Science; 563; 1-10-2018; 351-359
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