Kinetic Study of Dry Reforming of Methane Over Ni–Ce/Al2O3 Catalyst with Deactivation

• Published in: Topics in catalysis Vol. 62; no. 5-6; pp. 456 - 466
• Main Authors: Zambrano, Daniel, Soler, Jaime, Herguido, Javier, Menéndez, Miguel
• Format: Journal Article
• Language: English
• Published: New York Springer US 15.06.2019; Springer Nature B.V
• Subjects: Aluminum oxide; Catalysis; Catalysts; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Deactivation; Fixed bed reactors; Fixed beds; Industrial Chemistry/Chemical Engineering; Kinetic equations; Mathematical analysis; Methane; Original Paper; Pharmacy; Physical Chemistry; Reaction kinetics; Reforming; Methane dry reforming; Catalyst deactivation; Kinetic modelling; Hydrogen production
• ISSN: 1022-5528; 1572-9028
• DOI: 10.1007/s11244-019-01157-2

A kinetic study for dry reforming of methane over Ni–Ce/Al 2 O 3 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.