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Artículo

Pelletized Cu-Ni/CePr5 catalysts for H2 purification via Water Gas Shift reaction

Poggio Fraccari, Eduardo ArístidesIcon ; Bader, G.; Alemany, Luis; Mariño, Fernando JavierIcon
Fecha de publicación: 01/07/2020
Editorial: Elsevier
Revista: Fuel
ISSN: 0016-2361
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

Water Gas Shift (WGS) reaction recently gained attraction as a purifying method to remove CO in H2 stream produced from bio-alcohols reforming for fuel cells applications. In previous works, we tested Cu-Ni samples supported on Pr promoted ceria as catalysts for WGS reaction. However, powder samples are not recommended for a scale-up process and ceria samples lack of cohesive forces to obtain a pellet. Then, supported catalysts can be an interesting alternative to study. In the present work, alumina spheres were impregnated in order to replicate the same chemical formulation of powder-state samples. It was studied the influence in catalytic performance of several textural and catalytic features such as: pellet size, active phase content and distribution, Cu:Ni ratio in bimetallic samples, and contact time. The Cu samples showed a moderate activity and the Ni ones a better performance, but tendency to generate CH4. For all catalysts, the decrease in the pellet size induced a higher CO conversion, indicating strong mass diffusion effects. Besides, it was observed that small addition of Cu to Ni samples significantly moderated the methanation reaction, but maintaining the activity. The change in active metal content slightly modified the activity and changed the selectivity, in agreement with the characterization techniques results (H2-TPR and OSC). In summary, the sample with Cu:Ni ratio equal to 1:2 with 1.5 wt%, presented a great performance, by removing 8 to 2 %v/v of CO with an acceptable contact time and high selectivity, being the most promissory catalyst for higher scale tests.
Palabras clave: ALUMINA SPHERES , CU , NI , PELLETS , WGS
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info:eu-repo/semantics/restrictedAccess 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/11336/113398
DOI: https://doi.org/10.1016/j.fuel.2020.117653
URL: https://www.sciencedirect.com/science/article/abs/pii/S0016236120306487
Colecciones
Articulos(ITHES)
Articulos de INST. DE TECNOLOGIAS DEL HIDROGENO Y ENERGIAS SOSTENIBLES
Citación
Poggio Fraccari, Eduardo Arístides; Bader, G.; Alemany, Luis; Mariño, Fernando Javier; Pelletized Cu-Ni/CePr5 catalysts for H2 purification via Water Gas Shift reaction; Elsevier; Fuel; 271; 1-7-2020; 1-9; 117653
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