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Nanoscale Ziegler catalysts based on bis(acetylacetonate)nickel in the arene hydrogenation reactions
Applied Catalysis A: General ( IF 5.5 ) Pub Date : 2017-08-25 , DOI: 10.1016/j.apcata.2017.08.029
Yuliya Yu. Titova , Fedor K. Schmidt

The turnover frequencies of catalytic systems based on Ni(acac)2–AlEt3 or AlEt2(OEt) in the hydrogenation of benzene and its methyl-substituted homologs (toluene, three isomers of xylene, and 1,3,5-trimethylbenzene) have been determined at temperatures of 80–120 °C, initial PH2 = 15 bar, and different ratios of Al/Ni. The size and nature of the nanoparticles forming in the systems based on Ni(acac)2–AlEt3 or AlEt2(OEt) under the benzene hydrogenation condition shave been resolved by high-resolution electron microscopy and X-ray microanalysis. This study included the performance of competitive hydrogenation reactions of benzene with toluene or three xylene isomers. The relative adsorption constants of toluene and three xylene isomers have been determined and the stereochemistry of the hydrogen addition to the arene ring has also been elucidated.



中文翻译:

芳烃加氢反应中基于双(乙酰丙酮)镍的纳米级齐格勒催化剂

基于Ni(acac)2 -AlEt 3或AlEt 2(OEt)的苯和其甲基取代的同系物(甲苯,二甲苯的三个异构体和1,3,5-三甲基苯)的加氢反应系统的转换频率在80–120°C的温度下测定,初始P H2  = 15 bar,并且Al / Ni的比例不同。的大小和在基于Ni的系统形成纳米颗粒的性质(ACAC)2 -AlEt 3或ALET 2苯加氢条件下的(OEt)已通过高分辨率电子显微镜和X射线显微分析得到了解决。该研究包括苯与甲苯或三种二甲苯异构体竞争性氢化反应的性能。已经确定了甲苯和三种二甲苯异构体的相对吸附常数,并且还阐明了向芳烃环中加氢的立体化学。

更新日期:2017-08-25
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