减少甲醇制烯烃工艺中催化剂损耗的研究

作为替代石油化工生产低碳烯烃的技术路线,甲醇制烯烃技术成为近年来煤化工研究的热点。甲醇制烯烃工艺中,频繁反应-再生过程使催化剂经历持续的结焦和烧焦,是造成催化剂损耗的重要原因。在反应器和催化剂再生器之间的输送管道上设置间接加热器和间接冷却器,将进入再生器的失活催化剂适当升温,减少失活催化剂和再生器的温差,从而有效减少催化剂因巨大温差和剧烈升温速率产生热应力而导致催化剂热崩跑损;同时将进入反应器的再生催化剂适当降温,避免再生催化剂在反应器中与原料甲醇接触时表面快速结焦,影响催化剂活性和寿命。

Research on reducing the catalyst loss in the process of methanol to olefins

As a substitute for petrochemical technical routes to olefins production,the technology of methanol to olefins（MTO） has become a research focus in coal chemical industry recently.The catalysts experienced continuous coking and coke burning during frequent reaction-regeneration in MTO process,which was the main reason for serious loss of the catalysts.By implanting indirect heaters and indirect coolers in transportation lines between reactor and regenerator,deactivated catalysts from the reactor were properly heated before they entered the regenerator to decrease the temperature difference between the catalysts and the regenerator,which would efficiently retard the loss of the catalyst for hot-collapse and cracking caused by thermal stresses.At the same time,regenerated catalysts with higher temperature were cooled before going into the reactor so that rapid surface coking,which caused the reduction of activity and life span of the regenerated catalyst,was greatly prevented when it contacted with methanol.