Citation:
Hua Liu, Mengqian Chai, Guangxian Pei, Xiaoyan Liu, Lin Li, Leilei Kang, Aiqin Wang, Tao Zhang. Effect of IB-metal on Ni/SiO2 catalyst for selective hydrogenation of acetylene[J]. Chinese Journal of Catalysis,
;2020, 41(7): 1099-1108.
doi:
10.1016/S1872-2067(20)63568-9
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The IB metal (Au, Ag and Cu) alloyed Pd single atom catalysts had been proved to be efficient in promoting the selectivity for hydrogenation of acetylene to ethylene. As a base metal in the same group as Pd, the Ni-based catalysts are also active for hydrogenation reactions. Herein, the effects of the IB metals on the Ni/SiO2 catalyst for the selective hydrogenation of acetylene were systematically studied. Different from the Pd/SiO2 catalyst, the monometallic Ni/SiO2 catalyst is not active at low temperatures. The addition of the IB metals to the Ni/SiO2 catalysts can greatly enhance the activity. Besides, the catalytic activity of the AgNix/SiO2 and CuNix/SiO2 catalysts increase with the reduction temperature, while the AgNix/SiO2 catalysts are not sensitive to the pretreatment temperature. The origin of the effect of the different IB metals on the Ni-based catalysts for selective hydrogenation of acetylene is discussed based on the characterizations by XRD, TPR and microcalorimetric measurements.
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Keywords:
- Acetylene,
- Selective hydrogenation,
- Ethylene,
- Ni,
- IB metals
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