Comprehensive kinetic model for Fischer-Tropsch synthesis over a re-promoted Co/Al 2O 3 catalyst

Branislav S. Todic, Tejas J. Bhatelia, Wenping Ma, Gary Jacobs, Burtron H. Davis, Dragomir B. Bukur

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A comprehensive kinetic model for Fischer-Tropsch synthesis (FTS) on promoted cobalt-alumina catalyst was developed. Rate equations were derived based on the Langmuir-Hinshelwood-Hougen-Watson approach using well known carbide mechanism for FTS. To explain non-Anderson-Schulz-Flory (ASF) behavior, it was assumed that the desorption rate of an olefin precursor is a function of carbon number. Kinetic parameters were estimated by minimizing multiple response objective function using genetic algorithm and Levenberg-Marquardt method, as a global and local optimization tool, respectively. Model evaluation was based on physical meaningfulness of estimated parameters as well as on statistical relevance of the fit. Model yielded physically meaningful values of parameters. It was also able to correctly predict deviations from the ASF distribution and olefin to paraffin ratio dependence on carbon number. This is an abstract of a paper presented at the 2012 AIChE Spring Meeting and 8th Global Congress on Process Safety (Houston, TX 4/1-5/2012).

Original languageEnglish
Title of host publication12AIChE - 2012 AIChE Spring Meeting and 8th Global Congress on Process Safety, Conference Proceedings
Publication statusPublished - 2012
Event2012 AIChE Spring Meeting and 8th Global Congress on Process Safety, 12AIChE - Houston, TX, United States
Duration: 1 Apr 20125 Apr 2012

Other

Other2012 AIChE Spring Meeting and 8th Global Congress on Process Safety, 12AIChE
CountryUnited States
CityHouston, TX
Period1/4/125/4/12

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ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Safety, Risk, Reliability and Quality

Cite this

Todic, B. S., Bhatelia, T. J., Ma, W., Jacobs, G., Davis, B. H., & Bukur, D. B. (2012). Comprehensive kinetic model for Fischer-Tropsch synthesis over a re-promoted Co/Al 2O 3 catalyst. In 12AIChE - 2012 AIChE Spring Meeting and 8th Global Congress on Process Safety, Conference Proceedings