SYSTEM AND METHOD FOR PRODUCING SYNTHETIC FUEL

摘要

A system (1) for producing synthetic fuel (2) comprises a synthesis gas supply system (4) configured to supply initial synthesis gas (5);a water-gas shift reactor (6) configured to receive a portion of the initial synthesis gas and to increase the hydrogen-to- carbon monoxide ratio thereof, thereby producing shifted synthesis gas (9);a bypass arrangement(8) configured to lead a portion of the initial synthesis gas past the water-gas shift reactor and to combine it with the shifted synthesis gas to form final synthesis gas (11); and a synthesis island (12) configured to receive the final synthesis gas, and to convert it to a synthetic fuel (2). According to the invention, the system further comprises an external hydrogen supply system (10) configured to supply external hydrogen to increase the hydrogen-to-carbon monoxide ratio of the final synthesis gas (11); and a bypass control arrangement (13, 14) configured to control, during the operation of the system (1), the portion of the by- passed initial synthesis gas (7) on the basis of the amount of the external hydrogen supplied.