International journal of

ADVANCED AND APPLIED SCIENCES

EISSN: 2313-3724, Print ISSN:2313-626X

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 Volume 5, Issue 11 (November 2018), Pages: 80-85

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 Original Research Paper

 Title: Pore size effect of mesoporous support on metal particle size of Co/SiO2 catalyst in Fischer-Tropsch synthesis

 Author(s): Saowaluk Intarasiri 1, 2, Tanakorn Ratana 3, Thana Sornchamni 3, Sabaithip Tungkamani 1, 2, Monrudee Phongaksorn 1, 2, *

 Affiliation(s):

 1Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology, Bangkok, Thailand
 2Research and Development Center for Chemical Engineering Unit Operation and Catalyst Design (RCC), King Mongkut’s University of Technology, Bangkok, Thailand
 3PTT Public Company Limited, 555 Vibhavadi Rangsit Road, Chatuchak, Bangkok 10900, Thailand

 https://doi.org/10.21833/ijaas.2018.11.011

 Full Text - PDF          XML

 Abstract:

Fischer Tropsch (FT) synthesis is an alternative route to produce ultrahigh pure hydrocarbon fuels. The length of hydrocarbon chain produced from FT synthesis taking place over the cobalt supported catalysts is depended upon the reactant and product diffusion as well as the metal particle size of the catalyst.  Some works were reported that the pore size diameter of the support can control the metal dispersion. Therefore, the pore size can be considered as an important parameter for supported FT catalysts. This work aims to study the effect of pore size of mesoporous silica on metal particle size of cobalt-based catalysts and FT performance. The synthesized silica with the average pore size diameter of 7.2 nm and the commercial silica with the average diameter of 6.7 nm were used as supports to prepare CS catalyst samples. The cobalt supported on synthesized SiO2 shows larger cobalt oxide particle with lower dispersion compared to the results of the catalyst prepared using the commercial silica. Large cobalt oxide particle of supported catalyst decreases the interaction between metal and support which results in the increasing reducibility of cobalt oxide species and provides large cobalt metal particle after the reduction process. The FT tests were carried out under atmospheric pressure at 220 ᵒC, GHSV of 300 h-1 and H2/CO feed ratio of 2. The enhancement of selectivity towards long chain hydrocarbons (C5+) and FT activity were obtained from the catalyst with larger cobalt particle size. The growth of hydrocarbon chain during polymerization can be facilitated by the large surface of active site formed in the large pore size of support. Thus, the pore size diameter of support is an important key for the FT catalytic performance of cobalt catalyst supported on mesoporous silica materials. 

 © 2018 The Authors. Published by IASE.

 This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

 Keywords: Silica support, Cobalt based catalyst, Fischer-Tropsch reaction, Gasoline-diesel fuels

 Article History: Received 4 June 2018, Received in revised form 6 September 2018, Accepted 14 September 2018

 Digital Object Identifier: 

 https://doi.org/10.21833/ijaas.2018.11.011

 Citation:

 Intarasiri S, Ratana T, Sornchamni T et al. (2018). Pore size effect of mesoporous support on metal particle size of Co/SiO2 catalyst in Fischer-Tropsch synthesis. International Journal of Advanced and Applied Sciences, 5(11): 80-85

 Permanent Link:

 http://www.science-gate.com/IJAAS/2018/V5I11/Intarasiri.html

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