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Fischer-Tropsch Synthesis Over Zr-Promoted Co/gamma-Al2O3 Catalysts
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Kemisk teknologi.ORCID-id: 0000-0003-3826-1858
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Kemisk teknologi.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Topics in catalysis, ISSN 1022-5528, E-ISSN 1572-9028, Vol. 60, nr 17-18, s. 1285-1298Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
SPRINGER/PLENUM PUBLISHERS , 2017. Vol. 60, nr 17-18, s. 1285-1298
Emneord [en]
Fischer-Tropsch synthesis, Co/Al2O3, Cobalt, Zr, Activity
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-217746DOI: 10.1007/s11244-017-0813-1ISI: 000413848700003Scopus ID: 2-s2.0-85020109653OAI: oai:DiVA.org:kth-217746DiVA, id: diva2:1159351
Konferanse
17th Nordic Symposium on Catalysis, JUN 14-16, 2016, Lund Univ, Lund, SWEDEN
Merknad

QC 20171122

Tilgjengelig fra: 2017-11-22 Laget: 2017-11-22 Sist oppdatert: 2017-11-22bibliografisk kontrollert

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Barrientos, JavierBoutonnet, Magali

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