学术论文

      Na2SiO3对Pt/WO3/ZrO2催化剂催化甘油氢解制1,3丙二醇的影响

      Effects of Na2SiO3 on Pt/WO3/ZrO2 catalyst for glycerol hydrogenolysis to 1, 3-propanediol

      摘要:
      制备了不同Na2 SiO3质量分数的Pt/Na2 SiO3 WO3/ZrO2催化剂。通过X线衍射( XRD)、H2程序升温还原(H2 TPR)、H2的化学吸附、NH3程序升温脱附(NH3 TPD)等方法表征催化剂的理化性质。用固定床反应器考察催化剂对甘油氢解制1,3丙二醇反应的催化性能。结果表明:引入Na2 SiO3可调变催化剂中ZrO2晶相组成、催化剂的酸性、可还原性能和H2吸附性能,进而影响催化剂对甘油氢解制1,3丙二醇反应的催化性能。引入适量的Na2 SiO3,可使Pt/Na2 SiO3 WO3/ZrO2催化剂有较高的活性和稳定性。
      Abstract:
      A series of Pt/Na2 SiO3?WO3/ZrO2 catalysts with different Na2 SiO3 contents were prepared. The physical?chemical properties of the catalysts were characterized by X?ray diffraction ( XRD ) , H2 temperature?programmed reduction ( H2?TPR ), hydrogen adsorption, NH3 temperature?programmed desorption (NH3?TPD). The performance for glycerol hydrogenolysis to 1,3?propanediol were investigated in a fixed?bed continuous?flow reactor. Results showed that the crystalline structure of ZrO2 , acidic properties, reducibility, and the amount of chemisorbed hydrogen of the catalysts with addition of Na2 SiO3 were improved, which in turn affected the performance of glycerol hydrogenolysis to 1, 3?propanediol. Pt/Na2 SiO3?WO3/ZrO2 catalyst with proper content of Na2 SiO3 would have a high activity and stability.
      Author: YANG Ling KANG Weijie CHEN Changlin CHEN Rizhi
      作者单位: 南京工业大学 化工学院 材料化学工程国家重点实验室,江苏 南京,210009
      年,卷(期): 2016, 38(6)
      分类号: O643.3
      在线出版日期: 2016年12月23日
      基金项目: 国家高技术研究发展计划(863计划)(2012AA03A606);江苏省产学研前瞻性研究项目