Influence of Calcination Temperature on Activity and Selectivity of Ni–CeO2 and Ni–Ce0.8Zr0.2O2 Catalysts for CO2 Methanation

• Published in: Topics in catalysis Vol. 61; no. 15-17; pp. 1514 - 1527
• Main Authors: Yu, Yang, Bian, Zhoufeng, Song, Fujiao, Wang, Juan, Zhong, Qin, Kawi, Sibudjing
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.10.2018; Springer Nature B.V
• Subjects: Carbon dioxide; Catalysis; Catalysts; Cerium oxides; Characterization and Evaluation of Materials; Chemical bonds; Chemistry; Chemistry and Materials Science; Dispersion; Industrial Chemistry/Chemical Engineering; Methanation; Methane; Nickel; Organic chemistry; OriginalPaper; Oxidation; Pharmacy; Physical Chemistry; Roasting; Zirconium; Ni/CeO; Zr; In-situ DRIFTS; methanation; CO; Ni/Ce; Calcination temperature; O
• ISSN: 1022-5528; 1572-9028
• DOI: 10.1007/s11244-018-1010-6

Herein, we studied the influence of calcination temperature (500–800 °C) of Ni/CeO 2 and Ni/Ce 0.8 Zr 0.2 O 2 catalysts on the specific surface area, pore volume, crystalline size, lattice parameter, chemical bonding and oxidation states, nickel dispersion and CH 4 /CO production rate in CO 2 methanation. In general, the catalytic performance revealed that Zr doping catalysts could increase the CH 4 production rate. Combined with the production rate and the characterizations results, we found that the combination of nickel dispersion, peak area of CO 2 –TPD and O II /(O II + O I )) play the critical role in increasing the CH 4 production rate. It is well to be mentioned that the CO production rate is strongly influenced by the nickel dispersion. Furthermore, the in-situ DRIFTS confirmed that the CO originates from the decomposition of H-assisted formate species.