沈亚峰, 安霓虹, 谢继阳, 戴云生, 唐春, 周伟, 侯文明, 王红琴, 徐滢. 还原方式对Ru-Zn/ZrO2催化剂上苯加氢反应的影响[J]. 云南大学学报(自然科学版), 2017, 39(4): 656-660. doi: 10.7540/j.ynu.20160527
引用本文: 沈亚峰, 安霓虹, 谢继阳, 戴云生, 唐春, 周伟, 侯文明, 王红琴, 徐滢. 还原方式对Ru-Zn/ZrO2催化剂上苯加氢反应的影响[J]. 云南大学学报(自然科学版), 2017, 39(4): 656-660. doi: 10.7540/j.ynu.20160527
SHEN Ya-feng, AN Ni-hong, XIE Ji-yang, DAI Yun-sheng, TANG Chun, ZHOU Wei, HOU Wen-ming, WANG Hong-qin, XU Ying. Influence of reduction method on the Ru-Zn/ZrO2 catalysts activity in benzene selective hydrogenation[J]. Journal of Yunnan University: Natural Sciences Edition, 2017, 39(4): 656-660. DOI: 10.7540/j.ynu.20160527
Citation: SHEN Ya-feng, AN Ni-hong, XIE Ji-yang, DAI Yun-sheng, TANG Chun, ZHOU Wei, HOU Wen-ming, WANG Hong-qin, XU Ying. Influence of reduction method on the Ru-Zn/ZrO2 catalysts activity in benzene selective hydrogenation[J]. Journal of Yunnan University: Natural Sciences Edition, 2017, 39(4): 656-660. DOI: 10.7540/j.ynu.20160527

还原方式对Ru-Zn/ZrO2催化剂上苯加氢反应的影响

Influence of reduction method on the Ru-Zn/ZrO2 catalysts activity in benzene selective hydrogenation

  • 摘要: 以苯选择性加氢制环己烯为模型反应,考察了Ru-Zn/ZrO2催化剂制备过程中还原方式对催化剂催化性能的影响.运用TEM、SEM、BET等技术对催化剂进行了表征.评价结果表明,采用高压液相还原制备的Ru-Zn/ZrO2-3催化剂在苯选择加氢制环己烯反应中表现出高催化性能,当苯转化率为41%时,环己烯选择性达到了83.8%.TEM、SEM结果表明催化剂上Ru微晶呈高分散,有利于苯转化率的提高.BET比表面积25m2/g,Ru-Zn/ZrO2-3催化剂最可几孔径分布范围20~50nm,有利于环己烯选择性的提高.

     

    Abstract: The Ru-Zn/ZrO2 catalysts prepared by coprecipitation method with different reduction conditions were used for selective hydrogenation of benzene to cyclohexene.The characterization of the catalysts has been carried out by means of BET,SEM and TEM.Ru-Zn/ZrO2-3 catalyst,which was reduced with 140 ℃and 4.0 MPa H2,the benzene conversion and cyclohexene selectivity were 41% and 83.8%,respectively.It was found that the dispersion of Ru was responsible for the high activity of Ru-Zn/ZrO2-3 catalyst.In addition,the suitable pore size distribution of the catalyst was between 20nm and 50nm,which was beneficial for the increase of selectivity toward cyclohexene of the catalyst.

     

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