naa a22 4500 510818951 CHVBK 20180411083521.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s11814-012-0094-0 doi (NATIONALLICENCE)springer-10.1007/s11814-012-0094-0 Effect of nanocrystallite size of TiO2 in Co/TiO2 and Co/TiO2-Ru catalysts on methanation [Elektronische Daten] [Kitima Pinkaew, Piyasan Praserthdam, Bunjerd Jongsomjit] We studied the effect of crystallite size of nanocrystalline TiO2 derived from the sol-gel method on the properties of Co/TiO2 catalysts. First, nanocrystalline TiO2 supports having different crystallite sizes were prepared via the sol-gel method by varying the water:alkoxide ratios from 4 to 165. Then, they were used as support for the cobalt catalyst. After calcination, the crystallite size of Co3O4 was dependent on the size of TiO2 support. CO hydrogenation under methanation was performed to determine the activity and selectivity of Co/TiO2 catalysts. It revealed that the catalyst with smaller size of TiO2 crystallite exhibited higher catalytic activity due to higher Co dispersion without significant change in product selectivity. In addition, the Ru modification on the TiO2 support was also investigated. The Ru modification resulted in increased activity regardless of the size of TiO2 crystallite. Korean Institute of Chemical Engineers, Seoul, Korea, 2012 Nanocrystalline TiO2 nationallicence Sol-gel nationallicence Cobalt Catalyst nationallicence Methanation nationallicence CO Hydrogenation nationallicence Pinkaew Kitima Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, 10330, Bangkok, Thailand aut Praserthdam Piyasan Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, 10330, Bangkok, Thailand aut Jongsomjit Bunjerd Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, 10330, Bangkok, Thailand aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/1(2013-01-01), 50-54 0256-1115 30:1<50 2013 30 11814 https://doi.org/10.1007/s11814-012-0094-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-012-0094-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pinkaew Kitima Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, 10330, Bangkok, Thailand aut NATIONALLICENCE 700 1- Praserthdam Piyasan Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, 10330, Bangkok, Thailand aut NATIONALLICENCE 700 1- Jongsomjit Bunjerd Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, 10330, Bangkok, Thailand aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/1(2013-01-01), 50-54 0256-1115 30:1<50 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer