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Title: The effect of 1-alkene addition on hydrocarbon product distribution in Fischer-Tropsch synthesis on a cobalt catalyst

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.

Authors:
;
Publication Date:
Research Org.:
Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6033658
Report Number(s):
DOE/PC/79816-T2
ON: DE91018705
DOE Contract Number:  
AC22-87PC79816
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 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; 010408* - Coal, Lignite, & Peat- C1 Processes- (1987-); 100200 - Synthetic Fuels- Production- (1990-)

Citation Formats

Yates, I C, and Satterfield, C N. The effect of 1-alkene addition on hydrocarbon product distribution in Fischer-Tropsch synthesis on a cobalt catalyst. United States: N. p., 1991. Web.
Yates, I C, & Satterfield, C N. The effect of 1-alkene addition on hydrocarbon product distribution in Fischer-Tropsch synthesis on a cobalt catalyst. United States.
Yates, I C, and Satterfield, C N. Mon . "The effect of 1-alkene addition on hydrocarbon product distribution in Fischer-Tropsch synthesis on a cobalt catalyst". United States.
@article{osti_6033658,
title = {The effect of 1-alkene addition on hydrocarbon product distribution in Fischer-Tropsch synthesis on a cobalt catalyst},
author = {Yates, I C and Satterfield, C N},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6033658}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {7}
}

Technical Report:
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