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Development of kinetic model for CO hydrogenation reaction over supported Fe-Co-Mn catalyst

Arsalanfar, M ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1039/c6nj04126d
  3. Publisher: Royal Society of Chemistry , 2017
  4. Abstract:
  5. Kinetic modeling of CO hydrogenation over Fe-Co-Mn catalyst was investigated; a ternary catalyst was prepared using incipient wetness impregnation. The kinetic parameters were determined from experiments carried out in a fixed bed micro-reactor under the following process conditions: T = 523.15-533.15 K, P = 1-10 bar, H2/CO = 1/1-3/1 and space velocity = 4500 h-1. Seventeen rate expressions were derived from five different mechanisms according to Langmuir-Hinshelwood-Hougen-Watson (LHHW) and Eley-Rideal (ER) mechanisms and were tested against the experimental data. Non-linear regression method was used to estimate different kinetic parameters; according to the obtained experimental results and using statistical criteria, one kinetic expression based on LHHW mechanism (-rCO = KPCO·(P(H)2)0.5/[1 + αPCO + (βP(H)2)0.5]2) was chosen as the best fitted model. The activation energy for this model was found to be 84.5 kJ mol-1. The physicochemical properties of the catalyst were investigated using XRD, SEM, BET and TPR techniques. © 2017 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique
  6. Keywords:
  7. Carbon monoxide ; Cobalt ; Hydrogen ; Iron ; Manganese ; Article ; Catalyst ; Fixed bed reactor ; Heat transfer ; Hydrogenation ; Kinetics ; Nonlinear system ; Particle size ; Physical chemistry ; Priority journal ; Rate constant ; Reaction analysis ; Scanning electron microscopy ; Statistical model
  8. Source: New Journal of Chemistry ; Volume 41, Issue 18 , 2017 , Pages 10452-10466 ; 11440546 (ISSN)
  9. URL: https://pubs.rsc.org/en/content/articlelanding/2017/nj/c6nj04126d#!divAbstract