Preparation, characterization, and activity of pd/pss-modified membranes in the low temperature dry reforming of methane with and without addition of extra steam

• Tipo: Artigo em Revista Científica Internacional
• Data: 2021

Autores

Mateos-Pedrero C. (Autor) Outra; Soria, M. A. (Autor) FEUP; Guerrero-Ruíz A. (Autor) Outra; Rodríguez-Ramos I. (Autor) Outra

Revista

Título: Membranes

Vol. 322

Página Final: 518

ISSN: 2077-0375

Editora: MDPI

Indexação

ISI Web of Knowledge

ISI Web of Science

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00V-5FP

DOI: 10.3390/membranes11070518

Abstract (EN): The external surface of a commercial porous stainless steel (PSS) was modified by either oxidation in air at varying temperatures (600, 700, and 800¿ C) or coating with different oxides (SiO2, Al2 O3, and ZrO2). Among them, PSS-ZrO2 appears as the most suitable carrier for the synthesis of the Pd membrane. A composite Pd membrane supported on the PSS-ZrO2 substrate was prepared by the electroless plating deposition method. Supported Ru catalysts were first evaluated for the low-temperature methane dry reforming (DRM) reaction in a continuous flow reactor (CR). Ru/ZrO2-La2 O3 catalyst was found to be active and stable, so it was used in a membrane reactor (MR), which enhances the methane conversions above the equilibrium values. The influence of adding H2 O to the feed of DRM was investigated over a Ru/ZrO2-La2 O3 catalyst in the MR. Activity results are compared with those measured in a CR. The addition of H2 O into the feed favors other reactions such as Water-Gas Shift (RWGS) and Steam Reforming (SR), which occur together with DRM, resulting in a dramatic decrease of CO2 conversion and CO production, but a marked increase of H2 yield.

Idioma: Inglês

Tipo (Avaliação Docente): Científica