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Author(s): Miguel N. Moreira
Ana M. Ribeiro
A. F. Cunha
Alírio Rodrigues
Zabilskiy, M
Djinovic, P
Pintar, A
Title: Copper based materials for water-gas shift equilibrium displacement
Issue Date: 2016
Abstract: Water-gas shift reaction and sorption enhanced water-gas shift were studied over Cu-CeO2 and Cu-HTlc catalysts in the temperature range between 125 and 295 degrees C. The catalysts were characterized by N-2 sorption, XRD, H-2-TPR and SEM techniques. Among the tested catalysts, copper supported on polyhedral ceria nanoparticles showed the highest activity, achieving 87.6% CO conversion. High dispersion of copper was identified as a catalyst property required for high WGS activity. During SE-WGS tests using either a multilayer arrangement of Cu-CeO2 catalyst and K-HTlc sorbent, or Cu promoted hydrotalcite hybrid catalyst, nearly 70 mol% H-2 was obtained in the product gas stream during the initial transient period. Elevated pressure and surplus of steam in the feed increased the sorption capacity of K-HTlc, resulting in delayed CO2 breakthrough. On the other hand, dilution of feed stream with inert gas (He) resulted in a dramatic decrease of sorbent's capacity leading to an early CO2 breakthrough.
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/50020/2013- POCI-01-0145-FEDER-006984/Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais/LSRE-LCM
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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