A process for producing an olefin stream, said process comprising passing a feedstock stream comprising oxygenates over catalyst comprises a zeolite with a framework having a 10-ring pore structure, in which said 10-ring pore structure comprises a three- dimensional (3-D) pore structure, such as MFI, wherein the pressure is 2-20 bar and the temperature is 150-350°C; or the pressure is 2-30 bar and the temperature is 340- 400°C, and wherein an olefin stream comprising C2-C3 olefins is withdrawn from said olefin stream and used as additional feed stream. The olefin stream may be converted to jet fuel, particularly sustainable aviation fuel (SAF) by further oligomerization and hydrogenation.
展开▼
