丙烯直接气相临氢环氧化催化剂结构调控和催化剂构-效关系研究进展

发布时间：2018-04-18 13:49

本文选题：丙烯环氧化 + 环氧丙烷　；参考：《化学进展》2016年12期

【摘要】：环氧丙烷(PO)是仅次于聚丙烯和丙烯腈的第三大丙烯衍生物,广泛应用于轻工、医药和纺织等行业。相比于传统的氯醇法和共氧化法,在临氢条件下使用氧气直接氧化丙烯生产PO的工艺具有绿色环保、操作简单、经济性高等优势,是当前国内外PO生产领域的研究热点。本文针对该领域仍存在的催化剂寿命短、活性低等亟待解决的问题,综述了国内外近年来的研究进展,着重介绍催化剂中含钛载体的表面和结构性质、金属颗粒的形貌和电子效应对丙烯直接气相环氧化反应活性、稳定性的影响机制,并评述了催化剂的反应机理及结焦失活机理。此外,还总结了Cs、Ag、Pd、Pt、Ge、表面烷基化、离子液体、氮掺杂等助剂对催化性能的影响,分析了丙烯环氧化反应过程尚存的难题。最后,从载体材料的选择、催化剂性能的改进等方面展望了可能的解决途径和方向。
[Abstract]:Propylene oxide (PO) is the third largest propylene derivative after polypropylene and acrylonitrile. It is widely used in light industry, medicine and textile industries.Compared with the traditional chlor-alcohol method and co-oxidation process, the process of direct oxidation of propylene with oxygen to produce PO under hydrogen condition has the advantages of green environment protection, simple operation, high economy and so on. It is a hot research topic in the field of PO production at home and abroad.In order to solve the problems of short life and low activity of catalysts in this field, the research progress in recent years at home and abroad is reviewed, and the surface and structure properties of titanium carriers in the catalysts are emphatically introduced in this paper.The effects of the morphology and electron effect of metal particles on the activity and stability of direct gas phase epoxidation of propylene were discussed. The reaction mechanism and coking deactivation mechanism of the catalyst were reviewed.In addition, the effects of additives such as CSO AgN PdPtN, surface alkylation, ionic liquid and nitrogen doping on the catalytic performance were summarized, and the problems in the process of propylene epoxidation were analyzed.Finally, the possible solutions and directions are prospected from the selection of carrier materials and the improvement of catalyst performance.
【作者单位】：中国石油大学重质油国家重点实验室;华东理工大学化学工程联合国家重点实验室;
【基金】：国家自然科学基金项目(No.21476263,21606254) 山东省自然科学基金项目(No.2016ZRE28229) 中国博士后科学基金特别资助项目(No.2016T90657) 中国博士后基金项目(No.2015M582160) 山东省博士后创新项目(No.201601011)资助~~
【分类号】：O643.36

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