Synthesis gas preparing system and method

Abstract

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.

Description

Technical field [0001] The invention relates to a synthesis gas preparation system and method. Background technique [0002] The solid oxide electrolytic cell (SOEC) is a reversible energy conversion device with clean and efficient features. Its working temperature is generally 600~1000℃, which can electrolyze water vapor and carbon dioxide into H 2 , CO and O 2 , To store electrical energy in the form of fuel gas. In addition, the solid oxide electrolytic cell can also simultaneously remove H 2 O / CO 2 Co-electrolysis to generate synthesis gas (H 2 And CO), used to synthesize methanol and other higher-value chemicals. H 2 The presence of O can inhibit carbon deposits on the electrodes of the solid oxide electrolytic cell. This technology can also achieve CO 2 Recycling utilization of water reduces the greenhouse effect. [0003] At present, solid oxide electrolytic cells are used for CO 2 / H 2 In the field of syngas preparation by co-electrolysis, some progress has been made in ma...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of insufficient utilization of raw materials, low conversion efficiency, and high energy consumption per unit output when the solid oxide electrolytic cell technology is used in the prior art to prepare synthesis gas. Efficient synthesis gas preparation system and method coupled with electrolysis technology and coal gasification technology

Images