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Ce-promoted Co/Al2O3 catalysts for Fischer-Tropsch synthesis
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology. Univ Mayor San Andres, Bolivia.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology.
2017 (English)In: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 42, no 15, 9754-9765 p.Article in journal (Refereed) Published
Abstract [en]

The effect of ceria promotion on the performance of Co/Al2O3 catalyst was evaluated in a high pressure fixed bed reactor for Fischer Tropsch (FT) synthesis at close industrial conditions. Ce-Al2O3 supports with a molar ratio of Al/Ce = 8 were prepared by two different methods: one by co-precipitation of cerium and aluminum precursors in water in-oil microemulsion and the other one by aqueous impregnation of cerium nitrate on commercial alumina. These supports, together with the unmodified alumina carrier, were used to prepare four cobalt-based catalysts. These catalysts were characterized by XRD, SEM, EDX, TEM, N-2 adsorption/desorption, TPR and chemisorption techniques. The results show that the presence of CeO2 on the surface of the support favors the reducibility of cobalt oxides with a shift down in reduction temperature of about 70 degrees C. The catalytic evaluation of the catalysts revealed that cerium addition by impregnation increases the activity and selectivity to C5+ catalyst in FTS. The catalyst synthetized by microemulsion show lower catalytic performance. Nevertheless, the catalytic property of this material can be improved by increasing the crystalline micro-domains size of CeO2. (C) 2017 Hydrogen Energy Publications LLC.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2017. Vol. 42, no 15, 9754-9765 p.
Keyword [en]
Water-in-oil-microemulsion, Cerium promoter, Cobalt-alumina catalyst, Fischer-Tropsch synthesis
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-210386DOI: 10.1016/j.ijhydene.2017.01.056ISI: 000402587500039OAI: oai:DiVA.org:kth-210386DiVA: diva2:1119514
Note

QC 20170704

Available from: 2017-07-04 Created: 2017-07-04 Last updated: 2017-07-04Bibliographically approved

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CiteExportLink to record
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