Method and apparatus for reducing the decomposition products in a reactor system to olefin methanol.

A method of making an olefin product from a feedstock containing oxygenate, comprising: (a) direct feeding to an MTO reactor through a feed introduction nozzle bound feed to the MTO reactor and having an inner surface extending at least a portion of the nozzle inside the MTO reactor; (B) Maintaining the inner surface of the nozzle at a temperature below 350C; and (c) Putting in contact in the reactor, the feedstock with a catalyst to form an effluent comprising light olefins at a conversion temperature within the reactor 350 to 600 ° C.