Experimental work and kinetic modelling of CO2 hydrogenation to methanol on CeO2 supported In2O3 catalyst

Wei Lin Ng, Pramod Sripada, Saheli Biswas, Sankar Bhattacharya

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2 Citations (Scopus)

Abstract

This work investigates the kinetics of CO2 hydrogenation to methanol on In2O3/ CeO2 catalyst based on a dual-site Langmuir-Hinshelwood mechanism. Such studies on reaction kinetics and mechanism using In2O3 catalyst, which possesses high activity, selectivity and stability are limited. Thirteen sets of experimental data at steady-state using In2O3/ CeO2 catalyst with varying temperature (200–300 °C), pressure (1–50 bars), gas hourly space velocity (5,893 hr−1 −58,938 hr−1) were analysed. The experimental data were modelled to determine the rate-determining step and the rate expression using the Most-Abundant Reaction Intermediate (MARI) analysis. The reaction mechanism for this catalyst was proposed based on a reported DFT study on In2O3. An optimisation procedure was performed to identify new kinetic parameters using MATLAB-based code with nonlinear regression analysis. A comparison of estimated kinetic parameters was made with reported values. The derived kinetic model can be applied for reactor modelling in the future for scaling up purposes.

Original languageEnglish
Article number118885
Number of pages9
JournalApplied Catalysis A: General
Volume646
DOIs
Publication statusPublished - 25 Sept 2022

Keywords

  • CO hydrogenation
  • Indium oxide
  • Kinetic model
  • Methanol synthesis
  • Rate-determining step

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