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Fischer-Tropsch Synthesis Over Zr-Promoted Co/gamma-Al2O3 Catalysts
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.ORCID iD: 0000-0003-3826-1858
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology.
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2017 (English)In: Topics in catalysis, ISSN 1022-5528, E-ISSN 1572-9028, Vol. 60, no 17-18, 1285-1298 p.Article in journal (Refereed) Published
Abstract [en]

Two Zr-modified alumina supports were synthetized containing the same amount of Zr but a different distribution of this modifier over the alumina surface. These supports, together with the unmodified alumina carrier, were used to prepare three cobalt-based catalysts which were characterized and tested under relevant Fischer-Tropsch conditions. The three catalysts presented very similar porosity and cobalt dispersion. The addition of Zr nor its distribution enhanced the catalyst reducibility. The catalyst activity was superior when using a carrier consisting of large ZrO2 islands over the alumina surface. The use of a carrier with a homogeneous Zr distribution had however, a detrimental effect. Moreover, a faster initial deactivation rate was observed for the Zr-promoted catalysts, fact that may explain this contradictory effect of Zr on activity. Finally, the addition of Zr showed a clear enhancement of the selectivity to long chain hydrocarbons and ethylene, especially when Zr was well dispersed.

Place, publisher, year, edition, pages
SPRINGER/PLENUM PUBLISHERS , 2017. Vol. 60, no 17-18, 1285-1298 p.
Keyword [en]
Fischer-Tropsch synthesis, Co/Al2O3, Cobalt, Zr, Activity
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-217418DOI: 10.1007/s11244-017-0813-1ISI: 000413848700003OAI: oai:DiVA.org:kth-217418DiVA: diva2:1158188
Conference
17th Nordic Symposium on Catalysis, JUN 14-16, 2016, Lund Univ, Lund, SWEDEN
Note

QC 20171117

Available from: 2017-11-17 Created: 2017-11-17 Last updated: 2017-11-17Bibliographically approved

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Barrientos, JavierBoutonnet, Magali

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