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Artículo

NiO-based ceramic structured catalysts for ethylene production: Substrates and active sites

Brussino, PaulaIcon ; Banus, Ezequiel DavidIcon ; Ulla, Maria Alicia del H.Icon ; Bortolozzi, Juan PabloIcon
Fecha de publicación: 09/2020
Editorial: Elsevier Science
Revista: Catalysis Today
ISSN: 0920-5861
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Recubrimientos y Películas

Resumen

Structured catalysts have important advantages compared to powder formulations and they are required for processes intensification. In this work, three different ceramic structures: a cordierite monolith, an alumina foam and an alumina-silica paper were used as substrates for the deposition of a NiO-Al2O3 coating and tested in the oxidative dehydrogenation of ethane to produce ethylene. For comparison, a NiO-Al2O3 powder catalyst was also prepared. Nickel oxide species with different physicochemical features were obtained over each structure, evidenced by morphological (SEM-EDX) and physicochemical characterization (XRD, LRS and XPS). The best distributions of the catalytic coatings and NiO physicochemical properties were obtained when the monolith and the foam were used as substrates. These led to higher NiO-Al2O3 interactions and consequently to high ethylene selectivity values, 70–90 %, corresponding to the former an ethane conversion of 22 % and to the latter a 5 %. The distribution of the active phase on the ceramic paper was heterogeneous, with NiO agglomerations and poor NiO-support interaction thus achieving low olefin selectivity (∼ 30 %). The addition of a second element such as cerium was also studied in those structured catalysts with high selectivity, resulting in both cases in an increment of ethane conversion but a decrease in ethylene selectivity. This behavior was attributed to the generation of electrophilic oxygen species.
Palabras clave: CERAMIC PAPER , ETHYLENE , FOAM , MONOLITH , NIO
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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/11336/145503
URL: https://linkinghub.elsevier.com/retrieve/pii/S0920586120306398
DOI: http://dx.doi.org/10.1016/j.cattod.2020.09.005
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Articulos(INCAPE)
Articulos de INST.DE INVEST.EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Citación
Brussino, Paula; Banus, Ezequiel David; Ulla, Maria Alicia del H.; Bortolozzi, Juan Pablo; NiO-based ceramic structured catalysts for ethylene production: Substrates and active sites; Elsevier Science; Catalysis Today; 9-2020; 1-9
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