Role of methoxide species in isobutene formation from CO and H2 over oxide catalysts methoxide species in isobutene formation

✍ Scribed by Ken-ichi Maruya; Akihiro Takasawa; Takashi Haraoka; Kazunari Domen; Takaharu Onishi

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 737 KB
• Volume: 112
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/1381-1169(96)00218-x

✦ Synopsis

The role of metboxide species in selective formation of isobutene from CO and H, over ZrO, was investigated by means of 13C tracer method. Analysis of 13C-13C coupling in the formed isobutene showed that "CO hydrogenation over ZrO, pretreated with 13C0 and H, formed '2CH,='3C('2CH3)2, while j3C0 hydrogenation over ('*CH,),O-adsorbed ZrO, formed 13CH2 ='2C(*3CH3)2. It was proposed from these results that methoxide species gave central carbon of isobutene, while the other carbons came from gas phase CO. A reaction path through methoxide species was proposed.