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On the selectivity ...
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Lögdberg, SaraKTH,Kemisk teknologi
(författare)
On the selectivity of cobalt-based Fischer-Tropsch catalysts : Evidence for a common precursor for methane and long-chain hydrocarbons
- Artikel/kapitelEngelska2010
Förlag, utgivningsår, omfång ...
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Elsevier BV,2010
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-26827
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-26827URI
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https://doi.org/10.1016/j.jcat.2010.06.007DOI
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Språk:engelska
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Sammanfattning på:engelska
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Klassifikation
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20101207
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A total of 36 cobalt-based supported catalysts were investigated in the Fischer-Tropsch reaction at industrially relevant process conditions: 483 K, 20 bar, molar H-2/CO ratio = 2.1, pellet size: 53-90 mu m. The effect of adding water vapour to the feed was investigated for 20 of the catalysts, and a H-2/CO ratio of 1.0 was used for a few catalysts. The catalysts differed in support material, Co loading, promoters, Cl content, Co particle size (larger than similar to 6 nm), morphology, degree of reduction and preparation technique and showed a large variation in selectivity. For each set of process conditions, a linear relationship seems to exist between the selectivity to methane (and other light products) and C5+ indicating a common precursor, i.e. a common monomer pool, for all hydrocarbon products. A high selectivity to C5+ is mainly an effect of a high intrinsic chain-growth probability and unlikely to be a result of an enhanced cc-olefin readsorption. The universal effect of external water addition on the hydrocarbon selectivities is limited to a decrease in the methane selectivity. A small proportion of the catalysts developed "pure methanation" sites upon exposure to high partial pressures of water.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Lualdi, MatteoKTH,Kemisk teknologi(Swepub:kth)u1871ob2
(författare)
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Järås, SvenKTH,Kemisk teknologi(Swepub:kth)u1ba24kl
(författare)
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Walmsley, John C.
(författare)
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Blekkan, Edd A.
(författare)
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Rytter, Erling
(författare)
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Holmen, Anders
(författare)
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KTHKemisk teknologi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Catalysis: Elsevier BV274:1, s. 84-980021-95171090-2694
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