NiCu/SiO_(2)复合催化剂的制备及其苯甲醇脱氢性能  

Preparation of NiCu/SiO_(2) catalyst and its performance for dehydrogenation of benzyl alcohol

作　　者：李楠 付文华 史明豪 李正萍 马江权[1,2] LI Nan;FU Wenhua;SHI Minghao;LI Zhengping;MA Jiangquan(School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China;Jiangsu Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学石油化工学院,江苏常州213164 [2]江苏省先进催化与绿色制造协同创新中心(常州大学),江苏常州213164

出　　处：《常州大学学报（自然科学版）》2023年第6期26-34,共9页Journal of Changzhou University：Natural Science Edition

基　　金：常州市应用基础研究计划资助项目(CJ20220152)。

摘　　要：通过湿化学法制备了一系列微量Ni金属掺杂的NiCu/SiO_(2)复合催化剂,并研究了其催化苯甲醇脱氢制苯甲醛的活性。同时,考察了Ni和Cu/SiO_(2)质量配比以及反应温度对脱氢反应转化率、选择性的影响。结果表明,在Cu/SiO_(2)催化剂中掺杂微量金属Ni能够大幅提高脱氢反应的活性,并且当反应温度为340℃,Ni和Cu/SiO_(2)质量配比为1∶200的NiCu/SiO_(2)(1∶200)催化剂表现出优异的苯甲醇转化率和苯甲醛选择性,分别达90.4%和84.3%。进一步,通过XRD,FT-IR,SEM,TEM,XPS和BET等技术对催化剂进行表征。结果证实高度均匀分散的微量Ni金属暴露出更多的Cu活性位点,同时微量的Ni掺杂有利于提高脱氢反应的转化率和选择性。A series of Ni doped NiCu/SiO_(2)composite catalysts were prepared by wet chemical method,and their catalytic activities for dehydrogenation of benzyl alcohol to benzaldehyde were studied.At the same time,the effects of the mass ratio of Ni and Cu/SiO_(2)and reaction temperature on the conversion and selectivity of dehydrogenation were investigated.The results show that the activity of dehydrogenation reaction can be greatly improved by doping trace metal Ni into Cu/SiO_(2)catalyst,and when the reaction temperature is 340 ℃, the NiCu/SiO_(2) (1 ∶ 200) catalyst shows excellent benzyl alcohol conversion and benzaldehyde selectivity, reaching 90.4% and 84.3%, respectively. Furthermore, the catalysts were characterized by XRD, FT-IR, SEM, TEM, XPS, BET technologies. The results show that highly uniformly dispersed trace Ni metals expose more Cu active sites, and trace Ni doping is beneficial to improve the conversion rate and selectivity of dehydrogenation reaction.

关 键 词：NICU 苯甲醇 催化脱氢 苯甲醛 

分 类 号：TQ426[化学工程]