Method of operation of process to produce syngas from carbonaceous material

摘要

A process for producing syngas, the process comprising: gasifying carbonaceous material to provide a first syngas having a CO to CO2 molar ratio of less than about 0.5 until the first syngas reaches a first target temperature; upon reaching the first target temperature, gasifying carbonaceous material to provide a second syngas having a CO to CO2 ratio of greater than the first syngas; and passing at least a portion of the second syngas to a syngas cooler at a linear velocity of greater than about 24 meters per second.