Ni(II)–Mg(II)–Al(III) catalysts for hydrogen production from ethanol steam reforming: Influence of the activation treatments |
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| Authors: | Adriana Romero Matías Jobbágy Miguel Laborde Graciela Baronetti Norma Amadeo |
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| Affiliation: | 1. Laboratorio de Procesos Catalíticos, Departamento de Ingeniería Química, Facultad de Ingeniería Ciudad Universitaria, (1428) Buenos Aires, Argentina;2. INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, (1428) Buenos Aires, Argentina;1. Tecnologías de Procesos Catalíticos (PROCAT), Departamento de Ingeniería Química, Facultad de Ciencias, Universidad de Málaga, E-29071, Spain;2. ITHES (CONICET/Universidad de Buenos Aires) – Pabellón de Industrias, Ciudad Universitaria, 1428, Argentina;1. Department of Chemical Engineering, Indian Institute of Technology Delhi, HauzKhas, New Delhi, 110016, India;2. Department of Chemical and Biochemical Engineering, University of Saskatchewan, Saskatoon, SK, S7N5C5, Canada;1. Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India;2. Department of Chemical and Biochemical Engineering, University of Saskatchewan, Saskatoon, SK S7N5C5, Canada;1. State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;2. School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, China |
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| Abstract: | The effect of the Ni(II)–Mg(II)–Al(III) layered double hydroxide (LDH) activation conditions over the surface and bulk composition and the catalytic performance in ethanol steam reforming (ESR) is studied. Ternary oxides were prepared by thermal decomposition of LDHs synthesized using the homogeneous precipitation method with urea. Catalyst precursor is submitted to two different activation treatments: calcinations at 400, 500, 600 and 700 °C with subsequent reduction at 720 °C, or direct reduction at 720 °C. The samples were characterized by sorptometry, H2 chemisorption, ICP chemical analysis, thermogravimetric analysis, X-ray diffraction, X-ray photoelectronic spectroscopy and temperature programming reduction. The catalysts obtained by calcination at 600 °C and then reduction at 720 °C and those directly reduced at 720 °C showed the better performance in ESR. The precursor submitted to a proper thermal treatment develops, through a decoration-demixing process, a Ni(II)-poor spinel-type shell onto NiO domains. |
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