煤基直接碳燃料电池硫处理工艺探索

摘要

Coal is the main energy in our country. As a main forms of energy production,coal power plants produces a large amount noxious gases with greenhouse gas CO2 ,sulfur compounds,and so on. Theoretical value of the coal-based direct carbon fuel cells thermodynamic efficiency is closed to 100% and it can re-alize CO2 zero-emission. It’s the key energy utilization technology of high efficiency and low carbon emis-sion. The industrial application of the battery is restricted by the sulfur poisoning. The complex desulfu-rization process(PCESTO)for raw coal,consisted of gravity flotation,chemical oxidation,electrochemical oxidation,ionic liquid extraction,solvent extraction and rising temperature. PCESTE can effectively reduce the content of sulfur in coal and remove convert poisonous sulfur into the non-poisonous one in the direct carbon fuel cell.%煤炭是我国的主要能源，以燃烧煤为主的煤炭利用过程产生了大量的温室气体 CO2、含硫化合物气体等。通过煤基直接碳燃料电池发电，理论热力学效率接近100%，而且可以实现 CO2的零排放，是煤高效、低碳洁净利用的关键技术，其大规模推广应用却受到原煤含硫化合物引起的硫中毒的制约。通过对现有煤脱硫工艺进行分析，提出洗选→化学氧化→电化学氧化→离子液体萃取→溶剂萃取→高温固硫（PCESTO）阶段联合处理工艺对原煤进行脱硫处理，可以有效降低煤中硫含量，定向转化直接碳燃料电池中硫的存在形式，减少和消除硫对直接碳燃料电池电极的毒化作用。