化工学报 ›› 2017, Vol. 68 ›› Issue (6): 2359-2367.DOI: 10.11949/j.issn.0438-1157.20170043

• 催化、动力学与反应器 • 上一篇    下一篇

Ni/La2O2CO3催化剂对山梨醇氢解产物的选择性调控

张涛1,2, 刘琪英1, 张彩红2,3, 张琦1, 马隆龙1   

  1. 1. 中国科学院广州能源研究所, 可再生能源与天然气水合物重点实验室, 广东 广州 510640;
    2. 中国科学技术大学纳米科学技术学院, 江苏 苏州 215123;
    3. 中国科学院大学, 北京 100049
  • 收稿日期:2017-01-10 修回日期:2017-02-24 出版日期:2017-06-05 发布日期:2017-06-05
  • 通讯作者: 刘琪英
  • 基金资助:

    国家自然科学基金项目(51376185,51536009,51576199)

Selective hydrogenolysis of sorbitol on Ni/La2O2CO3 catalysts

ZHANG Tao1,2, LIU Qiying1, ZHANG Caihong2,3, ZHANG Qi1, MA Longlong1   

  1. 1. Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China;
    2. Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, Jiangsu, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2017-01-10 Revised:2017-02-24 Online:2017-06-05 Published:2017-06-05
  • Contact: 10.11949/j.issn.0438-1157.20170043
  • Supported by:

    supported by the National Natural Science Foundation of China(51376185, 51536009, 51576199)

摘要:

采用共沉淀法制备了具有协同稳定作用的Ni/La2O2CO3催化剂,用于山梨醇选择性氢解为小分子醇的研究。采用X射线衍射、氢气程序升温还原、CO2程序升温脱附和扫描电镜对催化剂进行了表征。考察了不同配比Ni、La的加氢位点和碱性调控对山梨醇氢解产物的影响。结果表明,Ni、La摩尔比为2:3时,山梨醇转化率达到98.6%,C2~C3多元醇的产率达到43.8%,催化剂经2次反应后对山梨醇的转化率仍高达90%。探究了催化剂从酸性到碱性调变过程中,山梨醇氢解的产物分布,并提出了反应路径。

关键词: 山梨醇, 选择性催化还原, 纳米材料, 加氢, 共沉淀, C2~C3多元醇

Abstract:

Ni/La2O2CO3 catalysts with different Ni/La ratios were prepared by co-precipitation and the performance was tested in selective hydrogenolysis of sorbitol to C2—C3 polyols. The catalysts were characterized by X-ray diffraction(XRD), H2 temperature-programmed reduction(H2-TPR), CO2 temperature-programmed desorption(CO2-TPD) and scanning electron microscopy(SEM). The effect of hydrogenation and base regulation was investigated by varying the Ni/La ratios. The result shows that the conversion of sorbitol was 98.6% and the yields of C2—C3 polyols was 43.8% when the mole ratio of Ni to La is 2:3. After two times of reaction, the catalyst still achieved a sorbitol conversion of 90%. From acidic to alkaline, the products distribution of hydrogenolysis of sorbitol was discussed. The reaction pathway was also proposed based on the experiment results.

Key words: sorbitol, SCR, nanomaterials, hydrothermal, co-precipitation, C2—C3 polyols

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