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Kinetic study of the methane dry (CO2) reforming over the Ce0.70La0.20Ni0.10O2-δ catalyst

Abstract

The kinetic behaviour of Ce0.70La0.20Ni0.10O2-δ catalyst during methane dry reforming reaction was investigated in a fixed bed reactor in the temperature range of 923-1023K with the partial pressure of CH4 and CO2 ranging between 5 to 50 kPa. The experimental data were fitted using the empirical Power-Law rate equation and Langmuir-Hinshelwood kinetic models, proposed in literature for the Ni-La2O3 catalytic system and based on two step single- and dual-sites mechanism. The obtained fitting results, after statistical and thermodynamic discrimination, show that the mechanism of dry reforming reaction over the Ce0.70La0.20Ni0.10O2-δcatalyst can be successful described by the two steps dual-sites mechanism. The activation energy for the CH4 consumption from Power Law and Langmuir-Hinshelwood models were estimated to be 91.5 and 136.9kJ•mol-1, respectively. The lower activation energy for the CO2 consumption (70.2 and 100.6 kJ•mol-1 from both models, respectively) suggests that the CO2 consumption rate was faster than CH4.

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Article information


Submitted
30 Oct 2019
Accepted
18 Mar 2020
First published
18 Mar 2020

Catal. Sci. Technol., 2020, Accepted Manuscript
Article type
Paper

Kinetic study of the methane dry (CO2) reforming over the Ce0.70La0.20Ni0.10O2-δ catalyst

L. Pino, C. Italiano, M. Laganà, A. S. VITA and V. Recupero, Catal. Sci. Technol., 2020, Accepted Manuscript , DOI: 10.1039/C9CY02192B

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