钛硅分子筛的结构表征及催化性能研究

CHARACTERIZATION AND CATALYTIC PROPERTY OF TS1

以ＴＰＡＢｒ为模板剂，氨水等为碱源合成了钛硅分子筛ＴＳ１，并利用ＸＲＤ、ＩＲ、元素分析、ＵＶＶＩＳ、热分析等手段对合成的分子筛进行了表征，通过丙烯环氧化反应研究了合成的ＴＳ１的催化性能。结果表明，ＴＳ１凝胶与产品的硅钛比基本一致；随着硅钛比的降低，ＴＳ１由单斜晶系过渡为正交晶系；在硅钛比为１２９～１６．７的范围内，随着进入骨架的钛量增加，单胞体积增大；在３７０～６５０℃，ＴＰＡＢｒ分步氧化分解；所合成的ＴＳ１具有较好的热稳定性和催化丙烯环氧化性能。

TS1, synthesized using TPABr as template and ammonia etc as base resources, has been characterized by XRD, IR, UVVIS, Chemical analysis and thermal analysis The characterization has revealed that Ti atoms have been incorporated into framework and given much information The SiO_2/TiO_2 ratios in the products reflect the gel composition quite well The symmetry of TS1 changes from monoclinic form into orthorhombic form with the increase of titanium content The TPA decomposition occurs at the range of 370—650℃ Assynthesized solid exhibited high PO selectivity in the epoxidation of propylene using H_2O_2 as oxidant Assynthesized TS1s cost is much lower than that synthesized using TPAOH as template, but their catalytic property is nearly same