甲醇与C4烯烃共裂解制备乙烯和丙烯

 以甲醇与C4烯烃为原料，在固定床反应器上进行共裂解制备乙烯和丙烯，对共裂解进行了原料分压不变和催化剂负荷不变两种偶合方式的假设，针对不同偶合方式下二者共裂解产物分布的特点进行了研究。结果表明，甲醇与C4烯烃共裂解对副产物甲烷、碳氧化合物的生成有明显的抑制作用，甲醇转化的诱导期缩短，C4烯烃的转化得到促进，C5以上烃类的含量相对增加。通过两种偶合方式的对比得出，与保持原料分压不变的偶合方式相比，保持催化剂负荷不变的偶合方式更有利于丙烯的生成。

PREPARATION OF ETHYLENE AND PROPYLENE BY COUPLED CRACKING OF METHANOL AND C4 ALKENES

Preparation of ethylene and propylene by coupled cracking of methanol and C4 alkenes is investigated on a fix-bed down-flow reactor. The characteristics of the product distributions are studied under two coupled cracking modes, constant feed partial pressure mode and constant load of catalyst mode. Results show that the production of ethylene and propylene is enhanced in coupled cracking of methanol and C4 alkenes, and the formation of by-products, methane and carbonoxide, is inhibited significantly; the induction period of methanol conversion is shortened; the conversion of C4 alkenes is promoted and the content of C5+ hydrocarbons is increased. A comparison of the two coupled cracking modes indicates that the formation of propylene is benefited by the constant catalyst load mode.