Journal
APPLIED SURFACE SCIENCE
Volume 459, Issue -, Pages 74-79Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.07.206
Keywords
CO2 methanation; Ni/Al2O3-ZrO2; NiAl2O4; gamma-(Al, Zr)(2)O-3 solid solution
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Funding
- National High Technology Research and Development Program of China [2015AA050502]
- Natural Science Foundation of Fujian Province of China [2016J05037]
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CO2 methanation could offer significant energy and environment benefits if efficient catalyst is developed. Ni-based catalyst is the most promising catalyst for this reaction. Herein, a series of ZrO2 doped Ni/Al2O3 catalysts were fabricated by a co-precipitation method, and their reactivities with respect to the CO2 methanation were evaluated. Catalytic activities of the ZrO2-doped Ni/Al2O3 catalysts for CO2 methanation are superior to the undoped one. Characterization results suggest that gamma-(Al, Zr)(2)O-3 solid solution is formed after the introduction of ZrO2, which results in weakening the NiO-Al2O3 interaction and inhibits the formation of spinel NiAl2O4 . After activated by hydrogen reduction, those ZrO2-doped NiO/Al2O3 catalysts show smaller Ni nanoparticles sizes, and the one doped with 16 wt% ZrO2(Ni/AZ16) possesses the smallest sizes of Ni nanoparticles and shows the highest reactivity in the CO2 methanation.
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