ON THE MECHANISM OF METHANOL CONVERSION TO HYDROCARBONS OVER HZSM-5
ON THE MECHANISM OF METHANOL CONVERSION TO HYDROCARBONS OVER HZSM-5
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DOI：
10.1016/0021-9517(82)90292-5
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发表时间：
1982-01-01
影响因子：
7.3
通讯作者：
LAPIERRE, RB
中科院分区：
文献类型：
--
作者：
DESSAU, RM;LAPIERRE, RB
在各种烯烃和芳族化合物存在下使用 13 C标记的甲醇对HZSM-5上的甲醇转化的研究揭示了反应中间体解吸限制的重要性，如由未标记的甲苯产生的多甲基苯的广泛多重标记所证明的。这些研究还表明，大多数由甲醇生产的乙烯不是主要的 C1 偶联产物，而是来自 C3+ 烯烃的甲基攻击的次级产物，单标记乙烯的主要形成就证明了这一点。结合这些发现提出了一种经典的碳正离子机理，用于通过 HZSM-5 将甲醇转化为碳氢化合物。
Studies of methanol conversion over HZSM-5 using13C-labeled methanol in the presence of various olefins and aromatics revealed the importance of desorption limitation of reaction intermediates, as evidenced by extensive multiple labeling of polymethylbenzenes produced from unlabeled toluene. These studies also indicated that most of the ethylene produced from methanol is not a primary C1coupling product, but rather a secondary product derived from methyl attack on C3+olefins, as evidenced by the predominant formation of singly labeled ethylene. A classical carbenium ion mechanism incorporating these findings is presented for the conversion of methanol to hydrocarbons over HZSM-5.