负载于Y分子筛的纳米Ce-Cu-K催化剂制备及其性能研究  

Research on Preparation of Nano Complex Ce-Cu-K Catalyst Loaded in the Y-Type Zeolite and its Performance

作　　者：陈献[1] 吕高明[1] 汤吉海[1] 崔咪芬[1] 周哲[1] 曹锐[1] 乔旭[1,2] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009 [2]南京工业大学材料化学工程国家重点实验室,江苏南京210009

出　　处：《高校化学工程学报》2011年第1期109-113,共5页Journal of Chemical Engineering of Chinese Universities

基　　金：国家863计划基金资助项目(2009AA03Z504);江苏省基础研究计划(自然科学基金)资助项目(BK2008521)

摘　　要：采用柠檬酸溶胶凝胶-浸渍法制备了负载于Y分子筛的纳米铈、铜、钾复合氧化物颗粒催化剂,考察了对氯化氢氧化制氯反应的催化性能,运用XRD、N2等温吸附脱附、UV-Vis等手段对所制备的催化剂进行了表征,并测定了催化剂颗粒的抗压碎强度。研究结果显示,当负载量超过24.9%时,活性组分在分子筛表面形成了20～25 nm的纳米晶粒,呈现出一层具有较明显晶粒间隙的纳米复合物壳结构;随着活性组分负载量的增加,分子筛表面形成的纳米复合物层也增厚。在活性组分负载量为28.8%时氯化氢的转化率可达到85%,接近平衡转化率。当催化剂颗粒中硅胶含量达到11%时,颗粒的径向抗压碎强度达到107 N·cm-1,氯化氢的转化率达到80%,可满足氯化氢氧化工业催化剂强度及活性的要求。The catalysts of nano complex Ce-Cu-K oxide loaded in the Y-Type zeolite were prepared by soak-citrate sol gel method,and its catalytic performance on oxidation of HCl was studied.The catalysts were characterized by XRD,N2 adsorption desorption isotherms and UV-Vis.The anti-crushing strength of catalyst particles was also determined.The results show that the active components in the zeolite form the crystal nano grains with 20~25nm diameter and a shell structure of nano complex with apparent grain gap when the loading is up to 24.9%.The nano composites layer is thickened with increasing of active components loading in the zeolite.The conversion ratio of HCl reaches 85% which is close to the equilibrium conversion ratio when the active component loading in the prepared catalyst is 28.8%.The conversion ratio of HCl is 80% and the radial anti-crushing strength of catalysts particles reaches 107 N cm 1 when 11% of silica gel is added into the catalyst and it could meet the requirements of strength and activity for the industrial catalyst of HCl oxidation.

关 键 词：柠檬酸溶胶凝胶浸渍法 分子筛 氯化氢 纳米复合物 催化剂强度 

分 类 号：TQ426.61[化学工程] O643.36[理学—物理化学]