The nature of hydrocarbon pool (HCP) intermediates in the methanol-to-hydrocarbons (MTH) process has been thoroughly investigated, especially for BEA- and CHA-type zeolite catalysts like H-β H-SAPO-34. Herein, we further reveal dynamic mechanistic details MTH over H-ZSM-5 catalyst at 400 °C, based on dual-cycle mechanism HCP this medium-pore zeolite. Application switching sequences 13C-labeled ...