期刊
FUEL
卷 310, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2021.121813
关键词
CQDs; Nickel-based; Supported catalyst; High dispersion; CO methanation
资金
- National Natural Science Foundation of China [21808062, 21808064, 21776091]
Confining active metal particles inside the channel of mesoporous support is an effective way to improve catalytic activity and stability, reducing metal usage and obtaining low metal content catalyst with scientific significance.
Confining the active metal particles inside the channel of mesoporous support is an effective way to improve the catalytic activity and stability, as well as enhance the metal usage thus reducing the required amount of supported metal. In our research, a novel highly efficient Nickel-based catalyst with the metal particles confined in the pores of mesoporous support was obtained by in-situ hydrothermal synthesis with carbon quantum dots (CQDs) assisted. This catalyst is of scientific significance for low metal content (as low as 0.9 wt%), except for its large specific surface area, high metal dispersion and small metal particle size. And the catalyst exhibits satisfying CO methanation catalytic activity with 95% CO conversion and 90% CH4 selectivity at 400 degrees C and 15000 mlg(-1)h(-1) when the metal loading is 0.9 wt%. Meanwhile, the catalyst presents excellent thermal and long-term stability for that the metal particles are confined inside the pores of support, which could strengthen the metal-support interaction and thus inhibiting the metal agglomeration and carbon deposition effectively.
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