甲醇作为催化裂化部分进料反应过程的可行性分析

通过对甲醇制低碳烯烃(MTO)工艺与催化裂化(FCC)工艺的相似性分析,论述了二者结合的可能性。分析了FCC提升管反应器中的温度分布、催化剂活性变化和水存在的状况,以及这些因素对MTO反应的影响。同时对不同的甲醇加入方式进行了分析,并与FCC的多产液化气和柴油工艺(在提升管反应器底部注入汽油)进行比较,提出适宜的甲醇加入位置为FCC提升管反应器底部,先于原料油进料。此过程既可将甲醇转化为低碳烯烃,又有利于重油的催化裂化反应。初步论证了甲醇作为FCC部分进料的可行性,为甲醇作为FCC部分进料以多产低碳烯烃的进一步研究指出了方向。

Feasibility Analysis of Methanol as a Part of Fluidized Catalytic Cracking Feedstock

The feasibility analysis of integrating methanol to olefins(MTO)process with fluidized catalytic cracking(FCC)process was investigated on basis of their similarity and compatibility.The possibility of the two processes′ integration was proposed after analyzing various conditions in FCC riser reactor,namely temperature distribution,change of catalyst activity,existence of water,and effect of these parameters on MTO reaction.Feeding methanol at the bottom of riser reactor before entrance of heavy oil was suggested on the ground of analysis of various feeding forms and similarities with maximal gas and diesel(MGD)process of FCC(feeding gasoline at the bottom of riser).This integrated process in consideration would be beneficial not only to production of light olefins from methanol but also to heavy oil reaction in FCC unit.The feasibility of methanol as a part of FCC feedstock was primarily demonstrated.This analysis provided a constructive guideline for future research.