Kinetic Study of Dry Reforming of Methane Over Ni–Ce/Al2O3 Catalyst with Deactivation
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A kinetic study for dry reforming of methane over Ni–Ce/Al2O3 catalyst was performed, taking into account both the main reactions and the catalyst deactivation. The catalyst was prepared by a sequential wet impregnation process, with loadings of 5 wt.% Ni and 10 wt.% Ce. Experimental tests were carried out in a fixed bed reactor between 475 and 550 °C and several spatial times, using nitrogen as diluent. Several kinetic equations were compared. The best fit of experimental data was achieved using a Langmuir–Hinshelwood mechanism which takes into account the presence of two active sites. Pre-exponential factor and activation energy were calculated. the kinetics of deactivation was also determined. The relationship between catalyst activity and coke concentration was also studied. Several deactivation equations were considered in order to choose the best fit with experimental data.
KeywordsCatalyst deactivation Kinetic modelling Methane dry reforming Hydrogen production
The authors thank the Ministry of Science and Technology (Spain) for financial support through Project ENE 2013-44350R.
- 15.Benguerba Y, Virginie M, Dumas C, Ernst B (2017) Methane dry reforming over Ni-Co/Al2O3: kinetic modelling in a catalytic fixed-bed reactor. Int J Chem React Eng 15(6)Google Scholar
- 26.Fan MS, Abdullah AZ, Bhatia S (2009) Catalytic technology for carbon dioxide reforming of methane to synthesis gas. Chem Cat Chem 1:192–208Google Scholar
- 34.Świrk K, Gálvez ME, Motak M, Grzybek T, Da Costa P (2018) Syngas production from dry methane reforming over yttrium-promoted nickel-KIT-6 catalysts. Int J Hydrog Energy 44(1):274–286Google Scholar