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}
}