Use of simple test reactions to characterise the catalytic activity of a commercial CoO-MoO3-Al2O3 catalyst
作者:Christopher S. John、James G. Williamson、Lois V. F. Kennedy、J. Kelvin Tyler
DOI:10.1039/f19807601356
日期:——
Exchange of thiophene with D2 and reactions of deuterium-labelled propene and isobutene, followed using a combination of mass spectrometry and microwave spectroscopy, have been used to characterise the catalytic nature of a commercial CoO-MoO3-Al2O3(CMA) catalyst. The results indicate that the activity of partially sulphided CMA, produced by exposure to H2S or by hydrodesulphurization (h.d.s.) of ethanethiol
噻吩与D 2的交换以及氘标记的丙烯和异丁烯的反应,然后结合质谱和微波光谱法,已用于表征商业CoO-MoO 3 -Al 2 O 3(CMA)的催化性质催化剂。结果表明,通过暴露于H 2 S或乙硫醇的加氢脱硫(hds)产生的部分硫化的CMA的活性与未负载的MoS 2的活性非常相似。因此,硫化CMA对噻吩中的α氢交换显示出高选择性/活性,并通过半氢化中间体催化丙烯中的双键迁移,这是MoS 2的活性特征,而氧化物CMA对α交换的活性低得多,并且对于后者反应显示路易斯酸型活性。似乎在hds期间CMA催化剂可以有用地描述为“双功能”,其中MoS 2负载在酸性载体上并由其稳定。