Enhancement of syngas production from dry reforming of methane over Co/Al2O3 catalyst: Insight into the promotional effects of europium and neodymium. (December 2022)

• Record Type: Journal Article
• Authors: Pham, Cham Q.; Cao, Anh Ngoc T.; Phuong, Pham T.T.; Hoang Pham, Le Kim; Vi Tran, Thi Tuong; Trinh, Thanh H.; Vo, Dai-Viet N.; Bui, Thi Phuong Thuy; Nguyen, Tung M.
• Is Part Of: Journal of the Energy Institute. Volume 105(2022)
• Page Start: 314
• Page End: 322
• Publication Date: 2022-12
• Subjects: Cobalt catalyst -- Methane dry reforming -- Europium promoter -- Neodymium promoter -- Syngas -- Hydrogen production; Power (Mechanics) -- Periodicals; Power resources -- Periodicals; Fuel -- Periodicals; 621.04205
• DOI: 10.1016/j.joei.2022.10.004
• Languages: English
• ISSNs: 1743-9671

Abstract

Abstract: The dry reforming of methane is a high potential solution to reduce carbon dioxide and methane emissions and mitigate the global warming effect. In this study, a series of 3M-10Co/Al2 O3 (M = Eu, Nd) catalysts were prepared using the dry impregnation method. The introduction of these rare-earth metals was found to have positive effects on both cobalt dispersibility and reducibility. Moreover, due to the basic nature of Eu and Nd oxides, the carbon dioxide adsorption and activation were enhanced. During the reaction, the performances of promoted samples were superior to the pristine catalyst. The investigation of coke morphology revealed that much less amorphous carbon was found on 3Eu-10Co/Al2 O3 and 3Nd-10Co/Al2 O3 . It was attributed to the highly reactive carbon dioxide over the promoted catalysts, leading to facilitating amorphous carbon gasification. The highest activity was credited to 3Nd-10Co/Al2 O3 with approximately 77%, 87% of CH4 and CO2 conversions, respectively, at 973 K. Graphical abstract: Image 1 Highlights: Effects of Eu and Nd on Co/Al2 O3 catalyst for dry reforming of methane were studied. Cobalt dispersibility and reducibility were enhanced in the presence of a promoter. Superiority performance of rare-earth promoted catalysts. Carbon dioxide adsorption enhancement led to facilitate the gasification of coke. Coke elimination mechanism over the rare-earth promoted catalyst was proposed.