caa a22 4500 463190408 CHVBK 20180406164907.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s10973-006-7901-y doi (NATIONALLICENCE)springer-10.1007/s10973-006-7901-y Kinetic characterization of the reduction of silica supported cobalt catalysts [Elektronische Daten] [Y. Wan, J. Li, D. Chen] Abstact: The reduction process of silica supported cobalt catalyst was studied by thermal analysis technique. The reduction of the catalyst proceeds in two steps: $$ Co_3 O_4 + H_2 \to 3CoO + H_2 O, 3CoO + 3H_2 \to 3Co + 3H_2 O $$ which was validated by the TPR and in-situ XRD experiments. The kinetic parameters of the reduction process were obtained with a comparative method. For the first step, the activation energy, E a, and the pre-exponential factor, A, were found to be 104.35 kJ mol−1 and 1.18·106∼2.45·109 s−1 respectively. The kinetic model was random nucleation and growth and the most probable mechanism function was found to be f(α)=3/2(1−α)[−ln(1−α)]1/3 or in the integral form: g(α)=[−ln(1−α)]2/3. For the second step, the activation energy, E a, and the pre-exponential factor, A, were found to be 118.20 kJ mol−1 and 1.75·107∼2.45 · 109s−1 respectively. The kinetic model was a second order reaction and the probable mechanism function was f(α)=(1−α)2 or in the integral form: g(α)=[1−α]−1−1. Springer Science+Business Media, LLC., 2007 cobalt catalyst nationallicence Fischer-Tropsch synthesis nationallicence kinetic parameters nationallicence reduction nationallicence thermal analysis nationallicence Wan Y. Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, 430074, Wuhan, China aut Li J. Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, 430074, Wuhan, China aut Chen D. Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, 430074, Wuhan, China aut Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/2(2007-11-01), 415-419 1388-6150 90:2<415 2007 90 10973 https://doi.org/10.1007/s10973-006-7901-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7901-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wan Y. Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, 430074, Wuhan, China aut NATIONALLICENCE 700 1- Li J. Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, 430074, Wuhan, China aut NATIONALLICENCE 700 1- Chen D. Key Laboratory of Catalysis and Materials Science of Hubei Province, College of Chemistry and Materials Science, South-Central University for Nationalities, 430074, Wuhan, China aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/2(2007-11-01), 415-419 1388-6150 90:2<415 2007 90 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer