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Differences between Fisher-Tropsch synthesis of either gasoline or diesel based on changes of entropy and free energy
FUEL (2015)
  • Gladys Jiménez-García, Instituto Tecnológico Superior de Pátzcuaro
  • Rafael Maya-Yescas, Universidad Michoacana de San Nicolas de Hidalgo
Abstract
Synthesis of liquid fuels, mainly gasoline and diesel, by Fisher–Tropsch reactions is a complex process.
Prediction of products distribution as function of carbon number has been under discussion for many
years and, currently, it has not been possible to perform without a comprehensive description of catalyst
properties/formulation; therefore, usually experimental data are necessary to study this process. In this
work, analysis of experimental data obtained from several literature references is performed by evaluating
the total energy release, as consequence of heat of reaction, and entropy and free energy generated
during the experiments. It is found that depending on the production objectives and the catalyst used,
energy management during hydrocarbons synthesis, mainly paraffins and olefins, could be a criterion
to decide how long the hydrocarbons chain should be. Additionally, since total Gibbs’ free energy
becomes less negative as hydrocarbons are longer, it is assessed that production of gasoline and LP gas
could be more attractive as target than production of diesel.
Keywords
  • Cobalt based catalyts,
  • iron based catalyts,
  • Fisher-Tropsch synthesis,
  • liquid fuels
Disciplines
Publication Date
Winter January, 2015
DOI
http://dx.doi.org/10.1016/j.fuel.2014.08.041
Citation Information
Gladys Jiménez-García and Rafael Maya-Yescas. "Differences between Fisher-Tropsch synthesis of either gasoline or diesel based on changes of entropy and free energy" FUEL Vol. 149 (2015) p. 184 - 190
Available at: http://works.bepress.com/gladys_jimenez-garcia/10/
Creative Commons license
Creative Commons License
This work is licensed under a Creative Commons CC_BY-NC International License.