金溶胶法制备Au/ZSM-5催化剂及其轻柴油催化裂化多产丙烯反应性能  

Application of gold-sol modified ZSM-5 in light diesel catalytic cracking for increasing propylene production

作　　者：吴磊 苏慧娟 王云霞 孙逊 孙立波 祁彩霞 Wu Lei;Su Huijuan;Wang Yunxia;Sun Xun;Sun Libo;Qi Caixia(College of Chemistry&Chemical Engineering,Yantai University,Shandong Applied Research Center of Gold Nanotechnology,Yantai Key Laboratory of Gold Catalysis and Engineering,Yantai Shandong 264005,China)

机构地区：[1]烟台大学化学化工学院山东省黄金工程技术研究中心烟台市黄金催化与过程重点实验室,山东烟台264005

出　　处：《石油化工》2022年第7期750-755,共6页Petrochemical Technology

基　　金：国家自然科学基金项目(21773202);烟台市重点研发计划项目(2019LJRC140)。

摘　　要：以柠檬酸钠为保护剂,硼氢化钠为还原剂制备金溶胶,然后将金溶胶负载在ZSM-5分子筛上再经焙烧去除保护剂得到不同载金量的Au/ZSM-5催化剂,并以轻柴油催化裂化增产丙烯为探针反应,考察了载金催化剂的催化性能。采用XRD、FTIR、ICP-AES、N_(2)吸附-脱附、NH_(3)-TPD、Py-IR、HRTEM等方法对所得催化剂的物理化学性质进行表征。实验结果表明,微量金纳米粒子(不高于0.1%(w)Au)的引入,在几乎不影响ZSM-5分子筛酸性质及孔道结构的情况下,有效实现了丙烯的高产率,同时降低反应温度。表征结果显示,该制备过程最大程度地保留了母体ZSM-5分子筛的物理化学性质,同时又凸显出纳米金独特的催化性能。Gold-sols were prepared by using sodium citrate as protecting agent and sodium borohydride as reducing agent,then the gold-sol were loaded onto ZSM-5 molecular sieve to obtain Au/ZSM-5 catalysts with different loadings.And the catalytic performance of the gold-loaded catalysts was investigated by using the catalytic cracking of light diesel to produce propylene as probe reaction.The physicochemical properties of the studied catalysts were analysed by methods such as XRD,FTIR,ICP-AES,N_(2) adsorption-desorption,NH_(3)-TPD、Py-IR and HRTEM.The results showed that the trace amounts of gold nanoparticles(less than 0.1%(w)Au)effectively helped to achieve high yields of propylene while reducing the reaction temperature with little effect on the acid properties and pore structure of the ZSM-5 molecular sieve.This preparation process preserves the physicochemical properties of the parent ZSM-5 molecular sieve to the greatest extent possible,while highlighting the unique catalytic properties of nano gold.

关 键 词：金溶胶 ZSM-5分子筛 催化裂化 丙烯 

分 类 号：TQ426.8[化学工程]