Abstract
The influence of the activation atmosphere (air and hydrogen) on the properties of Ni/SBA-15 and Ni/γ-Al2O3 catalysts was investigated. The results show that calcination in H2 atmosphere has a great promotion on the dispersion of Ni/SBA-15 but little influence on the reduction behaviors of nickel species. On the contrary, calcination in H2 atmosphere has little influence on the dispersion of Ni/γ-Al2O3 catalyst but a great promotion on the reduction behaviors of nickel species. Therefore, the activities of Ni/SBA-15 and Ni/γ-Al2O3 catalysts for hydrogenation of naphthalene are promoted by calcination in H2 atmosphere, but the promotion effects on Ni/SBA-15 and Ni/γ-Al2O3 catalysts are difference. The promotion on Ni/γ-Al2O3 catalyst is due to the enhancement of its reduction degree, which is enhanced from 39.9 % by calcination in air to 96.5 % by calcination in H2. The promotion on Ni/SBA-15 catalyst is attributed to the improvement of its dispersion, which is improved from 11.9 % by calcination in air to 27.4 % by calcination in H2. As a result, the activity is improved about 260 % for Ni/γ-Al2O3 catalyst but only 100 % for Ni/SBA-15.
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Acknowledgments
This work was supported by National Basic Research Program of China (973 Program, Grant 2011CB201302), the Key Project of Coal Joint Fund from Natural Science Foundation of China and Shenhua Group Corporation Limited (Grant U1261208), the Natural Scientific Foundation of China (Grants 21076001, 20936007, 21176001, 51174254), Natural Scientific Foundation of Anhui Province (090414152), Natural Scientific Foundation of Anhui Educational Department (KJ2008B162). This work was subsidized by Strategic Chinese-Japanese Joint Research Program (Grant 2013DFG60060). Authors are also appreciative for the financial support from the Provincial Innovative Group for Processing & Clean Utilization of Coal Resource.
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Ren, S., Zhao, R., Zhang, P. et al. Effect of activation atmosphere on the reduction behaviors, dispersion and activities of nickel catalysts for the hydrogenation of naphthalene. Reac Kinet Mech Cat 111, 247–257 (2014). https://doi.org/10.1007/s11144-013-0629-3
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DOI: https://doi.org/10.1007/s11144-013-0629-3