NaOH浓度对苯选择加氢制环己烯Ru-Zn催化剂性能的影响  

Effect of NaOH concentration on performance of Ru-Zn catalyst for selective hydrogenation of benzene to cyclohexene

作　　者：孙海杰[1] 陈秀丽[1] 黄振旭[1] 刘仲毅[2] 刘寿长[2] 

机构地区：[1]郑州师范学院化学化工学院环境与催化工程研究所,河南郑州450044 [2]郑州大学化学与分子工程学院,河南郑州450001

出　　处：《化工学报》2016年第4期1324-1332,共9页CIESC Journal

基　　金：国家自然科学基金项目(21273205;U1304204);河南省高等学校重点科研项目(16A150025);河南省科技攻关重点项目(162102210333)~~

摘　　要：用共沉淀法制备了纳米Ru-Zn催化剂,考察了不同浓度Na OH同时作沉淀剂和还原介质对苯选择加氢制环己烯Ru-Zn催化剂性能的影响,并用X射线衍射(XRD)、N_2物理吸附(BET)、X射线荧光光谱(XRF)和透射电镜(TEM)手段等对催化剂进行了表征。结果表明,Na OH浓度可以调变Ru-Zn催化剂的Zn含量、粒径和孔径,进而影响Ru-Zn催化剂的苯选择加氢制环己烯性能。Na OH含量为15%时制备的Ru-Zn催化剂在优化的反应条件下获得了61.5%的环己烯收率,而且该催化剂具有良好的重复使用性能。Ru-Zn catalysts were prepared by the co-precipitation method, and the effect of the different Na OH concentration as precipitant and reduction medium on the performance of Ru-Zn catalyst for selective hydrogenation of benzene to cyclohexene was investigated. The catalysts were characterized by X-ray diffraction（XRD）, N2 physisorption（BET）, X-ray fluorescene（XRF） and transmission electron micrograph（TEM）. It was found that the concentration of Na OH could modify the Zn contents, particle size and pore diameter, and then affect the performance of Ru-Zn catalysts. The Ru-Zn catalyst prepared with the Na OH concentration of 15% gave a high cyclohexene yield of 61.5%. Moreover, this catalyst exhibited the excellent reusability.

关 键 词：苯 加氢 钌 催化剂 沉淀剂 还原介质 

分 类 号：X511[环境科学与工程—环境工程]