CAJ | 학술논문

采用同体多核~(13)C,~(27)Al及~(29)Si MAS NMR结合吸附气体xe后的~(129)Xe NMR,详细研究了乙烯和2-丁烯歧化生成丙烯反应过程中6%Mo/Hβ-Al_2O_3催化剂上积炭的类型和落位.结果表明,积炭以饱和烷烃为主,并随着反应的进行生成更多的支链烷烃,积炭主要分布在Hβ分子筛上,并主要落位在分子筛的交叉孔道处.
채용동체다핵~(13)C,~(27)Al급~(29)Si MAS NMR결합흡부기체xe후적~(129)Xe NMR,상세연구료을희화2-정희기화생성병희반응과정중6%Mo/Hβ-Al_2O_3최화제상적탄적류형화락위.결과표명,적탄이포화완경위주,병수착반응적진행생성경다적지련완경,적탄주요분포재Hβ분자사상,병주요락위재분자사적교차공도처.
Multinuclear solid-state ~(13)C, ~(27)Al, and ~(29)Si MAS NMR and ~(129)Xe NMR were used to study the carbon deposition on the 6%Mo/Hβ-Al_2O_3 catalyst in metathesis of ethene and 2-butene to propene. The results showed that the coke composition was aliphatic hy-drocarbons, and the most of them was present in Hβ zeolite instead of in Al_2O_3. The ~(129)Xe NMR experiments clearly revealed that the depos-ited carbon was located at the positions of channel intersections in HI3 zeolite, which caused the deactivation of the catalyst.