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Artículo

Development of an active, selective and durable water-gas shift catalyst for use in membrane reactors

Lombardo, Eduardo AgustinIcon ; Cornaglia, Carolina Andre; Múnera Agudelo, John FernandoIcon
Fecha de publicación: 01/2016
Editorial: Elsevier Science
Revista: Catalysis Today
ISSN: 0920-5861
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

Rh(0.6%)/La2O3 and Rh(0.6%)/La2O3(27 wt%)·SiO2 were assayed for the WGS reaction at 673 K and 1 atm. They were both more active than industrial Cr-Fe based catalysts. Rh(0.6%)/La2O3 was the most active but it progressively deactivated. To investigate its deactivation and the stability of the Rh(0.6%)/La2O3(27 wt%)·SiO2, the WGS reaction was carried out in a DRIFTS cell in operando mode. The deactivation of the former was due to the strong adsorption of intermediate oxygenates. Another disadvantage of the Rh formulations was their methanation activity. Therefore, a series of formulations containing 0.1 wt% through 1.2 wt% Pt supported on La2O3(27 wt%)·SiO2 were synthesized and catalytically evaluated in a fixed-bed reactor. The activity, methane formation and stability were carefully checked. The fresh and used catalysts were characterized through a battery of techniques including XRD, LRS and XPS. The Pt(0.1 wt%) formulation resulted the most active one per gram of platinum and negligible methanation occurred. It maintained the activity and selectivity after 155 h on stream. This catalyst was tested in a Pd-Ag membrane reactor to produce ultrapure H2 (<10 ppm of CO) that can be used to feed a low temperature PEM fuel cell. Comparing our results with those already published, it is concluded that our system is one of the best ones reported so far.
Palabras clave: Pt , Combined Oxides , H2 Production , Durability Tests , Rh/La2o3 Deactivation
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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/11336/34115
DOI: http://dx.doi.org/10.1016/j.cattod.2015.06.015
URL: http://www.sciencedirect.com/science/article/pii/S0920586115003806?via%3Dihub
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Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Citación
Lombardo, Eduardo Agustin; Cornaglia, Carolina Andre; Múnera Agudelo, John Fernando; Development of an active, selective and durable water-gas shift catalyst for use in membrane reactors; Elsevier Science; Catalysis Today; 259; 1; 1-2016; 165-176
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