The invention discloses a synthesis gas preparing
system and method. The synthesis gas preparing
system comprises a
solid oxide electrolytic tank, a feed
gas supply system, a fused salt supply systemand a synthesis
gas mixing chamber. The
solid oxide electrolytic tank comprises a
cathode, an
anode and an
electrolyte. The
cathode is in contact with feed gas, and the
anode is in contact with the fused salt mixed with carbon
powder and a catalyst. According to the synthesis gas preparing system and method,
coupling of a
solid oxide electrolytic tank technology and a
coal gasification technologyis achieved, O2 generated in the
electrolysis / co-
electrolysis reaction process is subjected to
coal gasification reaction with the carbon
powder to generate CO, the high temperature fused salt is utilized to serve as a dispersing agent of the carbon
powder, the specific surface area of the
coal gasification reaction is enlarged, accordingly the
transformation efficiency and the yield of the synthesis gas are improved,
energy consumption per unit output is reduced, and the specific proportion of needed synthesis gas can be further adjusted. The synthesis gas preparing system and method are suitable for distributed
type synthesis gas production factories, and have the characteristics of being high in energy efficiency, simple in operation, high in safety, capable of being produced in batches and the like.