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Preferential formation of 1-butene as a precursor of 2-butene in the induction period of ethene homologation reaction on reduced MoO 3 /SiO 2 catalyst
Reaction Kinetics, Mechanisms and Catalysis ( IF 1.7 ) Pub Date : 2020-05-06 , DOI: 10.1007/s11144-020-01773-0
Takashi Suzuki , Hidekazu Komatsu , So Tajima , Kouki Onda , Ryuji Ushiki , Sayuri Tsukamoto , Hiroki Kuroiwa

Ethene homologation reaction to give propene (3C2H4 → 2C3H6) was examined on reduced molybdena silica (MoO3/SiO2) catalyst at initial ethene pressure around 14.66 kPa (110 mmHg) and a temperature of 30 °C. In the very first stage of the ethene homologation reaction, induction period was observed as well as previous results reported in the references. During the induction period, ethene dimerization providing 1-butene was preferentially occurred. In addition, it was indicated that isomerization of 1-butene to 2-butene was retarded by the presence of excess ethene as a raw material. Therefore, it might be considered that the induction period of the ethene homologation reaction on the reduced MoO3/SiO2 catalyst might be caused by insufficiency of 2-butene to promote reverse propene metathesis (CH2=CH2+CH3-CH=CH-CH3 → 2CH2=CH-CH3).



中文翻译:

在还原MoO 3 / SiO 2催化剂上乙烯同系反应的诱导期中,优先形成1-丁烯作为2-丁烯的前体

在还原的氧化钼二氧化硅(MoO 3 / SiO 2)上检测了乙烯的同源反应,得到丙烯(3C 2 H 4  →2C 3 H 6乙烯催化剂的初始乙烯压力约为14.66 kPa(110 mmHg),温度为30°C。在乙烯同源反应的第一阶段,观察到诱导期以及参考文献中报道的先前结果。在诱导期间,优先发生提供1-丁烯的乙烯二聚。另外,表明存在过量的乙烯作为原料,阻碍了1-丁烯向2-丁烯的异构化。因此,可以认为还原的MoO 3 / SiO 2催化剂上的乙烯同系反应的诱导期可能是由于2-丁烯不足以促进反向丙烯复分解(CH 2 = CH 2 + CH 3 -CH = CH-CH3  →2CH 2 = CH-CH 3)。

更新日期:2020-05-06
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