Kinetic studies on catalytic decomposition of methane to hydrogen and carbon over Ni/TiO2catalyst

Abstract

Experiments were conducted in a fixed-bed catalytic reactor to study the decomposition of methane to hydrogen and carbon over 13 wt % Ni/TiO 2 -based catalyst. The variables include the volumetric flow rate of reactant (relative partial pressures of methane and argon of 0.5 each) (100 < υ 0 < 450 mL/min) and reaction temperature (823 < T < 1173 K). The experimental data of conversion versus time were subjected to the integral method of analysis, and the rate law of the decomposition reaction was found to be first-order. An activation energy of 60 kJ/mol was obtained. A possible reaction sequence for methane decomposition was validated against experimental data. An analysis of the rate equations indicated that the adsorption of methane on the surface is the rate-controlling step. This observation was same as that obtained from an analysis of data by both integral and differential methods. Using the design equation for a packed plug-flow reactor, predictions were made to obtain the conversion profiles at various operating conditions. Good agreement was obtained upon comparison of the experimental and simulated data.

Citation

Zein, S. H. S., Mohamed, A. R., & Sai, P. S. T. (2004). Kinetic studies on catalytic decomposition of methane to hydrogen and carbon over Ni/TiO2catalyst. Industrial & engineering chemistry research, 43(16), 4864-4870. https://doi.org/10.1021/ie034208f

• Journal Article Type: Article
• Acceptance Date: May 4, 2004
• Online Publication Date: Jul 8, 2004
• Publication Date: Aug 1, 2004
• Deposit Date: May 22, 2020
• Journal: Industrial and Engineering Chemistry Research
• Print ISSN: 0888-5885
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 43
• Issue: 16
• Pages: 4864-4870
• DOI: https://doi.org/10.1021/ie034208f
• Keywords: Catalysts; Hydrogen; Hydrocarbons; Oxides; Organic reactions
• Public URL: https://hull-repository.worktribe.com/output/550039
• Publisher URL: https://pubs.acs.org/doi/abs/10.1021/ie034208f