钛硅分子筛/地聚物复合微球的制备及其催化性能  

PREPARATION AND CATALYTIC PERFORMANCE OF TITANIUM SILICON MOLECULAR SIEVE/GEOPOLYMER COMPOSITE MICROSPHERES

作　　者：陈锦泓 王梦琦 龙联真 王扬扬 苏文锋 赖芳 葛圆圆 Chen Jinhong;Wang Mengqi;Long Lianzhen;Wang Yangyang;Su Wenfeng;Lai Fang;Ge Yuanyuan(Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004)

机构地区：[1]广西大学化学化工学院广西石化资源加工及过程强化技术重点实验室,南宁530004

出　　处：《石油炼制与化工》2024年第12期22-30,共9页Petroleum Processing and Petrochemicals

基　　金：国家自然科学基金地区项目(22266006)。

摘　　要：以经过聚乙烯亚胺(PEI)修饰后的地聚物微球(GQ)作为载体,采用原位生长的方法,制备了钛硅分子筛/地聚物复合微球(TS-1@GQ)。探讨了PEI浓度对TS-1@GQ催化性能的影响,并运用扫描电镜(SEM)、X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、X射线光电子能谱(XPS)等方法对最佳TS-1@GQ进行表征,同时评价了其催化1-己烯制备1,2-环氧己烷的性能。结果表明,当PEI浓度达到0.003 mol/L时,TS-1@GQ表面的TS-1分子筛负载量(w)可达11.43%。在反应温度25℃下,当TS-1@GQ用量为0.02 g、n(1-己烯)∶n(H_(2)O_(2))为1∶1时,TS-1@GQ对1-己烯的转化率可达13.19%,1,2-环氧己烷的选择性达到95.88%,优于商用TS-1的催化效果。此外,该催化剂还展现出了良好的可循环性。Titanium-silicon molecular sieve/geopolymer composite microspheres(TS-1@GQ)were prepared by in situ growth method using geopolymer microspheres(GQ)modified with polyethyleneimine(PEI)as carriers.The effects of PEI concentration on the catalytic performance of TS-1@GQ were investigated,the optimal TS-1@GQ was characterized by scanning electron microscope(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR)and X-ray photoelectron spectroscopy(XPS),and its catalytic performance for the preparation of 1,2-epoxyhexane from 1-hexene was also evaluated.The results showed that the loading of TS-1 molecular sieves on the surface of TS-1@GQ could reach 11.43%when the PEI concentration was 0.003 mol/L.At the reaction temperature of 25℃,when the dosage of TS-1@GQ was 0.02 g,and n(1-hexene)∶n(H_(2)O_(2))was 1∶1,the conversion rate(w)of 1-hexene could reach 13.19%,and the selectivity of 1,2-epoxyhexane could reach 95.88%.In addition,the catalyst also showed good recyclability.

关 键 词：钛硅分子筛 地聚物微球 1-己烯 1 2-环氧己烷 

分 类 号：TQ426[化学工程]