(787g) CO2 Emission Reduction By the Reverse Boudard Reaction - Coal Gasification With CO2

CO₂ capture and sequestration from coal-fired power plants is an energy intensive process, both in CAPEX and OPEX. CO₂ emission reduction by gasification of coal with CO₂ is an alternative method for future new coal-fired power plants. The reaction of carbon with CO₂ giving CO is also called the reverse Boudouard reaction.  This reaction is highly endothermic; however, energy from other co-existing exothermic reactions can be used to reduce the overall energy consumption. We developed a new process for this application [1]. Initial coal gasification under thermal plasma conditions makes the reaction more favorable. With the presence of water vapor, this process is able to produce syngas with CO₂and coal as the feed. This paper will also address the subsequent syngas cleanup step.

Reference

[1] Maoqi Feng, Francis Huang, Richard Johnson, Enhancement of syngas production in coal gasification with CO₂ conversion under plasma conditions, US Patent 8,435,478 (issue May 7, 2013).