Shape Selectivity in the Conversion of Methanol to Hydrocarbons: The Catalytic Performance of One-Dimensional 10-Ring Zeolites: ZSM-22, ZSM-23, ZSM-48, and EU-1

The methanol-to-hydrocarbon (MTH) reaction, a process in which low-value carbon-rich feedstocks are converted to value-added petrochemical products, is studied over one-dimensional 10-ring zeolites: ZSM-22 (TON), ZSM-23 (MTT), ZSM-48 (*MRE), and EU-1 (EUO). The latter three are little studied as MTH catalysts and were expected to display interesting product-shape-selective properties. The influence of slight differences in channel systems of the materials (size and shape) on product distribution and stability is investigated under various reaction conditions. In addition, the influence of coke deposition on product selectivity is investigated. Temperatures between 350 and 500 °C and WHSV between 2 and 6 g g–1 h–1 are investigated using a fixed bed reactor. The products are analyzed using online GC, and hydrocarbons trapped in the channels of the material during the reaction were liberated using the standard HF dissolution procedure and analyzed using GC/MS. Despite the small differences in the channel sha...