Modeling diffusional limitations in Fischer Tropsch synthesis catalyst at near critical and supercritical solvent conditions

Aswani K. Mogalicherla, Elfatih E. Elmalik, Nimir O. Elbashir

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

Abstract

Conducting Fischer-Tropsch synthesis (FTS) reaction in near critical and supercritical fluid (SCF) media has certain advantages over traditional routes because of the unique characteristics of the supercritical phase. An assessment of diffusional limitations in fixed bed tubular reactors, which contain catalyst particles of a few millimeter diameters, was carried out using a conventional theory of diffusion-reaction in porous pellets. The LHHW model developed by Mogalicherla et al. from Co catalyst at near critical and supercritical fluid (n-hexane) conditions was used to account for reaction kinetics details. The binary diffusional coefficients of the reactants and products in supercritical solvent were estimated from correlation proposed by Hong He, which accounts for the molecular weights and critical properties of all compounds, reactor operation conditions, and reaction mixture density. The effectiveness factor for LHHW type kinetics was estimated using an approximation method proposed by Hayes et al. The optimal operating conditions for SCF-FTS operated in a fixed bed reactor were determined. This is an abstract of a paper presented at the 2011 AIChE Spring Meeting & 7th Global Congress on Process Safety (Chicago, IL 3/13-17/2011).

Original languageEnglish
Title of host publication11AIChE - 2011 AIChE Spring Meeting and 7th Global Congress on Process Safety, Conference Proceedings
PublisherAmerican Institute of Chemical Engineers
ISBN (Print)9780816910670
Publication statusPublished - 2011
Event2011 AIChE Spring Meeting and 7th Global Congress on Process Safety, 11AIChE - Chicago, IL, United States
Duration: 13 Mar 201117 Mar 2011

Other

Other2011 AIChE Spring Meeting and 7th Global Congress on Process Safety, 11AIChE
CountryUnited States
CityChicago, IL
Period13/3/1117/3/11

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ASJC Scopus subject areas

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

Cite this

Mogalicherla, A. K., Elmalik, E. E., & Elbashir, N. O. (2011). Modeling diffusional limitations in Fischer Tropsch synthesis catalyst at near critical and supercritical solvent conditions. In 11AIChE - 2011 AIChE Spring Meeting and 7th Global Congress on Process Safety, Conference Proceedings American Institute of Chemical Engineers.