skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Estimates of rate coefficients for elementary processes occurring during Fischer-Tropsch synthesis over Ru/TiO[sub 2]

Abstract

The dynamics of elementary processes involved in Fischer-Tropsch synthesis of hydrocarbons over Ru/TiO[sub 2] have been determined from the analysis of data from both steady-state and transient-response experiments. Both types of experiments were carried out with different feed catalyst bed residence times to assess the effects of olefin readsorption on the dynamics of chain initiation, propagation, and termination. Strong evidence was found for the rapid reentry of ethylene into the chain growth process. The reentry of C[sub 3+] olefins, though, is negligible for the conditions studies. The holdup of hydrocarbons in a weakly physisorbed state was found to be significant for C[sub 6+] products and must be accounted for in the simulation of transient-response experiments. When the effects of ethylene readsorption and C[sub 6+] holdup are properly taken into account, the rate coefficients for chain initiation, propagation, and termination, determined from simulations of the transient-response experiments, are independent of carbon number and catalyst-bed residence time. Rate coefficients for the readsorption of ethylene, the depolymerization of adsorbed ethyl groups, and the dehydrogenation of methyl of methylene groups were also determined from simulations of the transient-response experiments. 31 refs., 15 figs., 1 tab.

Authors:
;  [1]
  1. Lawrenece Berkeley Lab., CA (United States)
Publication Date:
OSTI Identifier:
6798270
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis; (United States)
Additional Journal Information:
Journal Volume: 146:1; Journal ID: ISSN 0021-9517
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 02 PETROLEUM; 10 SYNTHETIC FUELS; FISCHER-TROPSCH SYNTHESIS; CHEMICAL REACTION KINETICS; RUTHENIUM; CATALYTIC EFFECTS; TITANIUM OXIDES; ALKENES; CATALYSTS; CHEMICAL PREPARATION; HETEROGENEOUS CATALYSIS; CATALYSIS; CHALCOGENIDES; CHEMICAL REACTIONS; ELEMENTS; HYDROCARBONS; KINETICS; METALS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PLATINUM METALS; REACTION KINETICS; SYNTHESIS; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; 400201* - Chemical & Physicochemical Properties; 020400 - Petroleum- Processing; 100200 - Synthetic Fuels- Production- (1990-)

Citation Formats

Komaya, Takashi, and Bell, A T. Estimates of rate coefficients for elementary processes occurring during Fischer-Tropsch synthesis over Ru/TiO[sub 2]. United States: N. p., 1994. Web. doi:10.1016/0021-9517(94)90027-2.
Komaya, Takashi, & Bell, A T. Estimates of rate coefficients for elementary processes occurring during Fischer-Tropsch synthesis over Ru/TiO[sub 2]. United States. https://doi.org/10.1016/0021-9517(94)90027-2
Komaya, Takashi, and Bell, A T. Tue . "Estimates of rate coefficients for elementary processes occurring during Fischer-Tropsch synthesis over Ru/TiO[sub 2]". United States. https://doi.org/10.1016/0021-9517(94)90027-2.
@article{osti_6798270,
title = {Estimates of rate coefficients for elementary processes occurring during Fischer-Tropsch synthesis over Ru/TiO[sub 2]},
author = {Komaya, Takashi and Bell, A T},
abstractNote = {The dynamics of elementary processes involved in Fischer-Tropsch synthesis of hydrocarbons over Ru/TiO[sub 2] have been determined from the analysis of data from both steady-state and transient-response experiments. Both types of experiments were carried out with different feed catalyst bed residence times to assess the effects of olefin readsorption on the dynamics of chain initiation, propagation, and termination. Strong evidence was found for the rapid reentry of ethylene into the chain growth process. The reentry of C[sub 3+] olefins, though, is negligible for the conditions studies. The holdup of hydrocarbons in a weakly physisorbed state was found to be significant for C[sub 6+] products and must be accounted for in the simulation of transient-response experiments. When the effects of ethylene readsorption and C[sub 6+] holdup are properly taken into account, the rate coefficients for chain initiation, propagation, and termination, determined from simulations of the transient-response experiments, are independent of carbon number and catalyst-bed residence time. Rate coefficients for the readsorption of ethylene, the depolymerization of adsorbed ethyl groups, and the dehydrogenation of methyl of methylene groups were also determined from simulations of the transient-response experiments. 31 refs., 15 figs., 1 tab.},
doi = {10.1016/0021-9517(94)90027-2},
url = {https://www.osti.gov/biblio/6798270}, journal = {Journal of Catalysis; (United States)},
issn = {0021-9517},
number = ,
volume = 146:1,
place = {United States},
year = {1994},
month = {3}
}