Keggin结构多阴阳离子构筑高活性多酸基氧化脱硫催化剂

发布时间：2018-04-29 14:08

本文选题：磷钨酸 + 多聚铝阳离子　；参考：《应用化学》2017年11期

【摘要】：设计开发高活性超深度氧化脱硫催化剂是解决未来石化工业适应日益严格要求的清洁燃油标准的重要出路之一。本文合成了Keggin结构多聚铝阳离子烷基硫酸盐Al_13-SDS和磷钨酸(HPW)多阴离子构筑的催化剂HPW-Al_13-SDS(SDS=十二烷基硫酸钠),采用傅里叶红外光谱(FT-IR)、紫外可见光谱(UV-Vis)、热重分析(TG)、X射线衍射(XRD)和Brunauer-Emmett-Teller(BET)等测试手段对催化剂的结构进行表征。FT-IR和UV-Vis的表征结果表明,焙烧后的催化剂中多聚铝阳离子和HPW同时保持Keggin骨架结构。以有机硫二苯并噻吩(DBT)的正己烷溶液为模拟油品的氧化脱硫为探针反应,在选定的条件下,DBT有机硫的脱除率达到99.5%。反应后HPW-Al_13-SDS催化剂的FT-IR和XRD的表征证实产生过氧化多钨酸化合物。催化剂能够循环使用,易分离,循环使用后活性未见明显降低,是理想的模型有机硫化物氧化脱除用催化剂。
[Abstract]:Design and development of high activity ultra deep oxidation desulfurization catalyst is one of the important ways to solve the future petrochemical industry to adapt to the increasingly stringent requirements of clean fuel standards. In this paper, Keggin polyaluminum cationic alkyl sulfate Al_13-SDS and phosphotungstate polyanionic catalyst HPW-Al13-SDSSDS = dodecyl sodium sulfate have been synthesized. Fourier transform infrared spectroscopy (FTIR), UV-Vis-IR spectroscopy and thermogravimetric analysis (TGA) have been used to analyze the X-ray diffraction of poly (aluminum) cationic sulfate (Al_13-SDS) and phosphotungstic acid (HPW). The structure of the catalyst was characterized by means of XRD and Brunauer-Emmett-Teller-Bet. The results of FT-IR and UV-Vis showed that the structure of the catalyst was characterized by FT-IR and UV-Vis. The polyaluminum cations and HPW in the calcined catalyst maintain the Keggin skeleton structure at the same time. Using n-hexane solution of organic sulfur dibenzothiophene (DBT) as a probe for oxidation desulfurization of simulated oil, the removal rate of organic sulfur from dibenzothiophene dithiophene (DBT) was 99.5% under selected conditions. The FT-IR and XRD characterization of the HPW-Al_13-SDS catalyst confirmed the formation of polytungstic acid peroxide compounds. The catalyst can be recycled, easily separated, and the activity of the catalyst is not obviously reduced after recycling, so it is an ideal catalyst for the oxidation and removal of organic sulphide.
【作者单位】：辽宁师范大学化学化工学院;大连理工大学化工学院;
【基金】：辽宁省博士科研启动基金项目(20131060)
【分类号】：TE624.9

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