CAJ | 학술논문

采用原位魔角旋转固体核磁共振技术研究了2-~(13)-异丁烷在SO_4~(2-)/ZrO_2上的重构化反应机理,考察了反应温度和H_2气氛对反应的影响.结果表明,反应初期,异丁烷在SO_4~(2-)/ZrO_2上的重构化反应以单分子机理为主,之后向双分子机理转变;反应温度的升高有利于单分子机理向双分子机理的转变;H_2的存在抑制了异丁烷的重构化反应,特别对其双分子机理的反应有较强的抑制作用.
채용원위마각선전고체핵자공진기술연구료2-~(13)-이정완재SO_4~(2-)/ZrO_2상적중구화반응궤리,고찰료반응온도화H_2기분대반응적영향.결과표명,반응초기,이정완재SO_4~(2-)/ZrO_2상적중구화반응이단분자궤리위주,지후향쌍분자궤리전변;반응온도적승고유리우단분자궤리향쌍분자궤리적전변;H_2적존재억제료이정완적중구화반응,특별대기쌍분자궤리적반응유교강적억제작용.
In situ ~(13)3C MAS NMR was employed to study the reaction mechanism of isobutane rearrangement over sulfated zirconia using 2-~(13)C-isobutane as a reactant. The effects of temperature and hydrogen atmosphere on the reaction were investigated. The results showed that the reaction of isobutane proceeded mainly via a monomolecular mechanism in its early stage, and then a bimolecular mechanism became dominant. Increasing temperature also led to the reaction from monomolecular to bimolecular mechanism. In the presence of hydrogen, the reaction of isobutane rearrangement, in particular that through the bimolecular pathway, was significantly inhibited.