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Study of mechanism and kinetic modeling of CO hydrogenation reaction over the impregnated Co-Ni/Al2O3 catalyst

Arsalanfar, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1002/jccs.201900526
  3. Publisher: Chinese Chemical Society Taiwan , 2020
  4. Abstract:
  5. An investigation of the kinetic and mechanism of CO hydrogenation reaction was performed on impregnated Co-Ni/Al2O3. Determination of kinetic parameters from the experiments was carried out in a micro fixed-bed reactor. Kinetic evaluations were performed under various operational conditions of T = 473–673 K, p = 1–14 bar, H2/CO = 1–3, and GHSV = 4,500 hr−1. Kinetic models and rate equations for CO consumption were obtained by using two main-type rate equations of Langmuir-Hinshelwood-Hougen-Watson (LHHW) and Eley-Rideal (ER). Estimation of various kinetic parameters was performed using a nonlinear regression method. According to the obtained experimental results and using statistical criteria, one kinetic expression based on the LHHW mechanism (-rCO = kp.bCO.PCO. bH2. PH2/[1+ bCO.PCO + bH2.PH2]2) was chosen as the best-fitted model. For this fitted model, the activation energy was found to be 109.2 kJ/mol. Characterization of the catalyst was also performed using X-ray diffraction (XRD), BET, scanning electron microscopy (SEM), and energy-dispersive x-ray spectrometer (EDS) techniques. © 2020 The Chemical Society Located in Taipei & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  6. Keywords:
  7. Characterization ; CO hydrogenation ; Co-Ni catalyst ; Impregnation ; Kinetic model
  8. Source: Journal of the Chinese Chemical Society ; Volume 67, Issue 7 , 2020 , Pages 1152-1166
  9. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/jccs.201900526