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Title The effect of 1-alkene addition on hydrocarbon product distribution in Fischer-Tropsch synthesis on a cobalt catalyst
Creator/Author Yates, I.C. ; Satterfield, C.N.
Publication Date1991 Jul 01
OSTI IdentifierOSTI ID: 6033658; Legacy ID: DE91018705
Report Number(s)DOE/PC/79816-T2
DOE Contract NumberAC22-87PC79816
Other Number(s)Other: ON: DE91018705
Resource TypeTechnical Report
Research OrgMassachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering
Sponsoring OrgDOE; USDOE, Washington, DC (United States)
Subject01 COAL, LIGNITE, AND PEAT; 10 SYNTHETIC FUELS; COBALT; CATALYTIC EFFECTS; ALKENES; CARBON; FISCHER-TROPSCH SYNTHESIS; HYDROCARBONS; HYDROGENATION; MATHEMATICAL MODELS; SYNTHESIS GAS; CHEMICAL REACTIONS; ELEMENTS; FLUIDS; GASES; METALS; NONMETALS; ORGANIC COMPOUNDS; TRANSITION ELEMENTS
Description/Abstract The cobalt-catalyzed reactions of C{sub 2}H{sub 4}, C{sub 3}H{sub 6}, or 1-C{sub 4}H{sub 8} added to synthesis gas in concentrations ranging from 0.5 to 1.2 mol. % of total feed were studied at 220{degrees}C, and 0.45 to 1.48 MPa. H{sub 2}/CO feed ratios were varied between 1.45 to 2.25 and H{sub 2} + CO conversions between 5 and 30% were observed. 1-Alkenes incorporate into growing chains on the catalyst surface, probably by initiating and/or terminating the chain growth process. Only ethene may propagate chain growth significantly. The propensity of the 1-alkenes to incorporate decreases with increasing carbon number of the 1-alkene and is affected by the extent of competitive reactions, notably hydrogenation to the alkene and isomerization to the 2-alkene. Incorporation is most evident in products above about C{sub 10}+. The double-{alpha} behavior exhibited by most Fischer-Tropsch catalysts can be interpreted as the sum of two growth processes, one a stepwise single-carbon growth process and the other a 1-alkene incorporation process. Many of the effects of process variables on the hydrocarbon selectivity of Fischer-Tropsch catalysts are consistent with this theory. 14 refs., 10 figs., 1 tab.
Country of PublicationUnited States
LanguageEnglish
FormatSize: Pages: (37 p)
AvailabilityOSTI; NTIS; GPO Dep.
System Entry Date2007 Feb 06

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