“…A large number of 13 C MAS NMR investigations is concerned with the conversion of methanol into hydrocarbons (MTG: m ethanol to g asoline, MTO: m ethanol t o o lefins) on acid zeolites under batch conditions, that is in sealed glass ampoules. The zeolites H‐ZSM‐5,123–129 H‐SAPO‐5,127, 130 H‐SAPO‐11, 130 H‐SAPO‐34,128, 131–133 H‐Y,127 H‐EMT,127 H‐ZSM‐12,134 H‐ZSM‐23,130 H‐erionite,135 H‐mordenite,127 and H‐offretite,135, 136 as well as montemorillonite,137 and saponite137 have been used as catalysts. Even at reaction temperatures of 373 to 423 K, dehydration of methanol ( δ =50) adsorbed on acidic OH groups to dimethyl ether ( δ =61) occurs.…”