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Citation: ZHANG Qing, WANG Hui-Fang, SUN Guo-Song, HUANG Ke-Lin, FANG Wei-Ping, YANG Yi-Quan. Influences of Different Nickel Salt Precursors on Catalytic Performances of Ni/C Catalysts for Vapor-phase Carbonylation of Ethanol[J]. Chinese Journal of Applied Chemistry, ;2009, 26(8): 976-980. shu

Influences of Different Nickel Salt Precursors on Catalytic Performances of Ni/C Catalysts for Vapor-phase Carbonylation of Ethanol

1.
a College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005;
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b Guangxi Research Institute of Chemical Industry, Nanning

Corresponding author: YANG Yi-Quan,
Received Date: 11 August 2008
Available Online: 20 December 2008
Fund Project: 院校重点合作项目(0042-K81009) (0042-K81009)

Different nickel salt precursors,namely,nickel acetylacetone,nickel chlorate,nickel nitrate and nickel acetate,were used to prepare Ni/C catalysts for the vapor phase carbonylation of ethanol.The activity testing results reveal that the Ni/C catalyst prepared from nickel acetate showed maximal catalytic activity for the carbonylation of ethanol,with an ethanol conversion of 96.1% and a propionic acid selectivity of 95.7% in comparison with that prepared from other nickel precursors,while the catalyst prepared from acetylacetone nickel showed a minimum activity with an ethanol conversion of 68.9% and a propionic acid selectivity of 27.1%.The Ni/C catalysts were characterized by means of BET measurement,metal dispersion test,H₂ temperature-programmed reduction(H₂-TPR) and XRD.It was found that the catalytic performances of the Ni/C catalysts depended,to a great degree,on the interaction between nickel species and active carbon support.The nickel acetate molecule was confirmed to be easily adsorbed on the surface of active carbon,leading to a stronger interaction between nickel species and active carbon support,thereby increasing the absorption capacity of CO.Meanwhile,a better dispersion of the active component and smaller nickel crysta-llites were found.
- ethanol,
- active carbon,
- nickel salt precursor,
- vapor-phase carbonylation,
- propionic acid
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