CO_2/dimethyl ether (DME) feed mixtures in the DME-to-hydrocarbons(DTH) process

摘要

The DTH process represents the second stage in the conversion of syngas to hydrocarbons, where DME produced from the LPDME process is converted to C_1-C_(10) range hydrocarbons over a zeolite type catalyst in a fixed-bed tubular reactor. The reaction occurs in the vapor phase and typically operates at a temperature of 375 deg C. The product distribution can be controlled by varying the operating temperature, pressure and space velocity of DME. Previous investigations have examined the effects of T, P, WHSV, and catalyst type on olefin productivity as well as the processing advantages in starting with DME rather than MeOH.