Kinetics and mechanism of olefin methylation reactions on zeolites

► Rate per proton in different zeolite environments for C2H4 and C3H6 methylation. ► Rate is zero-order in dimethyl ether pressure and first-order in olefin pressure. ► Same mechanism, but rates differ by a factor of 30 across zeolites. ► Surface methoxide species are formed during steady-state operation; no direct C-H activation.