石油化工2024，Vol.53Issue(12)：1712-1719,8.DOI:10.3969/j.issn.1000-8144.2024.12.003
磷钨酸改性TS-1催化剂的制备及其催化油酸甲酯环氧化反应性能
Preparation of phosphotungstic acid-modified TS-1 catalyst and its catalytic performance for methyl oleate epoxidation
摘要
Abstract
Titanium silicalite zeolite(TS-1)was synthesized by the traditional hydrothermal method,and TS-1 was modified by phosphotungstic acid(HPA)to prepare catalysts(HPA/TS-1),which was used in the epoxidation of methyl oleate(MO).The structure of the catalysts was systematically characterized by XRD,FTIR,N2 adsorption-desorption,UV-Vis,SEM,TEM,etc.,and the catalytic performance of the HPA/TS-1 catalysts was also investigated in the epoxidation of MO.The results show that the HPA is uniformly dispersed on the surface of TS-1 zeolite and does not destroy the crystal framework structure of TS-1 and the coordination state of tetrahedrally coordinated Ti.Furthermore,the 6%HPA/TS-1 catalyst exhibits higher catalytic activity,suggesting that the MO conversion is 81.35%.The optimal epoxidation process catalyzed by 6%HPA/TS-1 is the reaction temperature of 80℃,reaction time of 12 h,catalyst dosage of 0.1 g,and n(MO)∶n(H2O2)of 1∶3.Additionally,the MO conversion decreases from 45.25%to 28.76%after three times of catalyst reuse,but the catalyst activity is significantly restored through the regeneration at 170℃.关键词
钛硅沸石/磷钨酸/油酸甲酯/环氧化/骨架钛/酸性Key words
titanium silicalite zeolite/phosphotungstic acid/methyl oleate/epoxidation/framework titanium/acidity分类
化学化工引用本文复制引用
周凯,张颖琦,骆贝宁,何文清,颜贤仔,吴国强..磷钨酸改性TS-1催化剂的制备及其催化油酸甲酯环氧化反应性能[J].石油化工,2024,53(12):1712-1719,8.基金项目
国家自然科学基金项目(21802055) （21802055）
江西省自然科学基金杰出青年基金项目(20242BAB23071) （20242BAB23071）
江西省自然科学基金面上项目(20202BABL205013). （20202BABL205013）
