Capture and identification of coke precursors to elucidate the deactivation route of the methanol-to-olefin process over H-SAPO-34
Bowen Yu, Wenna Zhang, Yingxu Wei, Xinqiang Wu, Tantan Sun, Benhan Fan, Shutao Xu, Zhongmin Liu
Abstract
The evolution of retained species during the whole methanol-to-olefins process was revealed with the aid of GC-MS, thermogravimetric analysis (TG) and density functional theory (DFT) calculations. Precise routes for the transformation of retained methylbenzenes to methylnaphthalenes were proposed, based on the direct capture of three possible organic intermediates, to explain the catalyst deactivation procedure.
Topics & Concepts
Olefin fiberMethanolChemistryCokeThermogravimetric analysisCatalysisDensity functional theoryProcess (computing)Organic chemistryPhotochemistryChemical engineeringComputational chemistryComputer scienceOperating systemEngineeringZeolite Catalysis and SynthesisCatalysis and Oxidation ReactionsCatalysis and Hydrodesulfurization Studies