National Engineering Laboratory for Methanol to Olefins,Dalian National Laboratory for Clean Energy,iChEM(Collaborative Innovation Center of Chemistry for Energy Materials),Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,P.R.China;
University of Chinese Academy of Sciences,Beijing 100039,P.R.China;
SAPO-34; Methanol-to-olefin(MTO); Polymethy Ibenzene; Dual-cycle mechanism; Isotopic tracer;