Conversion of methanol with C-5-C-6 hydrocarbons into aromatics in a two-stage fluidized bed reactor
Conversion of methanol with C-5-C-6 hydrocarbons into aromatics in a two-stage fluidized bed reactor
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两级流化床反应器中甲醇与 C-5-C-6 烃转化为芳烃
DOI：
10.1016/j.cattod.2015.09.022
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发表时间：
2016
期刊：
影响因子：
5.3
通讯作者：
Wei Fei
中科院分区：
文献类型：
--
作者：
Su Chang;Qian Weizhong;Xie Qing;Cui Yu;Tang Xiaoping;Yu Xiang;Wang Tong;Huang Xiaofan;Wei Fei
在两级流化床反应器中，以880 g Zn/ZSM-5催化剂为填料，在475℃、0.4 MPa条件下，研究了甲醇与c5 - c6烃（包括戊烷、己烷和环己烷）的混合转化。研究了混合进料对甲醇转化、甲醇自分解、焦炭沉积对催化剂、芳香产率和芳香分布的影响。甲醇转化基本完成，甲醇自分解得到明显抑制。甲醇与戊烷或环己烷加料均表现出正的热耦合效应，以提高芳香收率或抑制不良副反应。然而，混合进料不利于己烷转化为芳烃。与纯c5 - c6烃在较高温度下的转化相比，混合料在较低温度下的芳烃产率更高，验证了热耦合效应。结果证实，利用甲醇放热转化增强部分c5 - c6烃向芳烃的吸热转化是可行的，从而大大简化了高温运行时的供热或脱热工程。
The conversion of methanol mixed with C5–C6hydrocarbons (including pentane, hexane, and cyclohexane) was studied in a two-stage fluidized bed reactor packed with 880 g Zn/ZSM-5 catalyst at 475 °C and 0.4 MPa. The effect of the mixed feed on the methanol conversion, self-decomposition of methanol, coke deposition on the catalyst, aromatic yield, and the aromatic distribution was carefully studied. Methanol conversion was nearly complete and the self-decomposition of methanol can be suppressed significantly. There exhibited a positive heat coupling effect in the feeding of methanol with pentane or with cyclohexane to increase the aromatic yield or to suppress the undesirable side reactions. However, the mixed feed is unfavorable to the transformation of hexane into aromatics. Better aromatic yield in the lower temperature for the mixed feed, as compared to that for the conversion of pure C5–C6hydrocarbons in higher temperature, validated the heat coupling effect. The result confirmed that it is feasible to use the exothermic methanol conversion to enhance the endothermic transformation of some C5–C6hydrocarbons into aromatic, resulting in a great engineering simplification of heat supply or heat removal in high temperature operation.