王英文, 张雅静, 王康军, 谈立美, 陈姝颖. 蒸氨法制备Ni/SiO2催化剂及其在2-MF加氢制2-MTHF反应中的应用[J]. 燃料化学学报（中英文）, 2021, 49(1): 97-103. DOI: 10.1016/S1872-5813(21)60007-5
引用本文: 王英文, 张雅静, 王康军, 谈立美, 陈姝颖. 蒸氨法制备Ni/SiO2催化剂及其在2-MF加氢制2-MTHF反应中的应用[J]. 燃料化学学报（中英文）, 2021, 49(1): 97-103. DOI: 10.1016/S1872-5813(21)60007-5
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WANG Ying-wen, ZHANG Ya-jing, WANG Kang-jun, TAN Li-mei, CHEN Shu-ying. Preparation of Ni/SiO2 by ammonia evaporation method for synthesis of 2-MTHF from 2-MF hydrogenation[J]. Journal of Fuel Chemistry and Technology, 2021, 49(1): 97-103. DOI: 10.1016/S1872-5813(21)60007-5
Citation: WANG Ying-wen, ZHANG Ya-jing, WANG Kang-jun, TAN Li-mei, CHEN Shu-ying. Preparation of Ni/SiO2 by ammonia evaporation method for synthesis of 2-MTHF from 2-MF hydrogenation[J]. Journal of Fuel Chemistry and Technology, 2021, 49(1): 97-103. DOI: 10.1016/S1872-5813(21)60007-5
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蒸氨法制备Ni/SiO2催化剂及其在2-MF加氢制2-MTHF反应中的应用

Preparation of Ni/SiO2 by ammonia evaporation method for synthesis of 2-MTHF from 2-MF hydrogenation

    摘要
  • 摘要: 以硝酸镍为镍源，碱性硅溶胶为硅源，采用蒸氨法制备了Ni/SiO2催化剂。通过XRD、N2等温吸附脱附、H2-TPR、NH3-TPD、XPS和TG对催化剂进行表征。采用固定床反应器，考察了催化剂焙烧温度及反应条件对催化剂应用于2-甲基呋喃（2-MF）气相加氢合成2-甲基四氢呋喃（2-MTHF）的反应性能。结果表明，蒸氨法制备的Ni/SiO2催化剂在焙烧后均呈现层状硅酸镍结构，还原后保持了该结构，活性组分Ni晶粒尺寸较小、金属载体相互作用较强，从而具有较高的活性。催化剂的焙烧温度影响催化剂Ni晶粒尺寸及催化剂的表面酸性。在500 ℃焙烧条件下制备的催化剂性能最佳，优化反应条件下，2-MF转化率100%，2-MTHF选择性为93.5%，反应15 h内催化性能稳定；含碳的有机物在催化剂表面沉积是催化剂失活的主要原因。

     

    Abstract: The Ni/SiO2 catalysts were prepared by ammonia evaporation method, with nickel nitrate as Ni source and silica sol as the SiO2 source, for synthesis of 2-MTHF from 2-MF hydrogenation. The catalytic performance of catalysts prepared at different calcination temperatures were tested on a fixed-bed reactor. XRD, N2 adsorption-desorption, H2-TPR, NH3-TPD, XPS and TG were employed to characterize the structure and surface properties of these catalysts. The effect of calcination temperature on the structure, surface property and catalytic performance of catalysts were investigated. The result indicated that all the catalysts had a phyllosilicate structure after calcination, and maintained the structure after reduction. Ni particles dispersed well with smaller size and strong metal support interaction showed high activity. The surface acidity of catalysts was influenced by the calcination temperature. The maximum catalytic activity and selectivity were obtained on the catalyst calcined by at 500 ℃, which exhibited a 2-MF conversion of 100% and the 2-MTHF selectivity of 93.5% at the optimized condition, due to smaller particle size and suitable surface acidity.

     

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