CeO-supported Ni and Co catalysts prepared by a solution combustion method for H production from glycerol: the effect of fuel/oxidizer ratio and oxygen excess

• Published in: Catalysis science & technology Vol. 13; no. 18; pp. 5387 - 546
• Main Authors: Matveyeva, Anna N, Omarov, Shamil O, Gavrilova, Marianna A, Trofimuk, Andrey D, Wärnå, Johan, Murzin, Dmitry Yu
• Format: Journal Article
• Published: 18.09.2023
• ISSN: 2044-4753; 2044-4761
• DOI: 10.1039/d3cy00854a

Glycerol is a promising raw material for obtaining various chemicals and fuels, including H 2 . Nevertheless, the development of cost-effective and stable catalysts with high activity and selectivity for H 2 production from glycerol under mild conditions has been a serious problem for their practical use. In this work, a series of CeO 2 -supported Ni and Co catalysts with the content of Ni and Co as metal( ii ) oxides being 30 wt% was prepared by solution combustion synthesis via changing the fuel/oxidizer ratio ( = 0.7-3), the fuel type (glycine, urea), and the oxygen excess. Thus, various species of Ni and Co and their interactions with CeO 2 were obtained, which affected the reduction sequence, defectiveness, textural characteristics, and activity in steam and aqueous-phase reforming of glycerol. To study the characteristics of the obtained samples, instrumental methods such as XRD, DTA-TGA, low-temperature N 2 physisorption, SEM-EDX, H 2 -TPR, and H 2 - and CO 2 -TPD, as well as Raman spectroscopy, were used. The results demonstrated that the Ni-Ce-O system synthesized with a high glycine-to-oxidizer ratio can successfully compete with catalysts based on noble metals (Pt/γ-Al 2 O 3 ) in aqueous-phase reforming of glycerol. The impact of the fuel/oxidizer ratio, the fuel type and the oxygen excess in the synthesis of ceria supported Ni and Co catalysts on the physicochemical properties and activity in steam and aqueous-phase reforming of glycerol was studied.