CAJ | 학술논문

化学链燃烧技术逐渐发展成为一项非常有前景的实现CO2高效低能耗分离捕集技术.在小型固定床上研究了廉价钙基载氧体的还原/氧化反应特性以及持续循环能力,讨论了温度、压力、煤/载氧体质量比对钙基载氧体反应特性的影响.试验结果表明,温度和压力的升高能显著增强煤气化产物与CaSO4之间的反应,导致CO2收率和碳转化率相应增加.在煤/载氧体高质量比情况下,由于实际反应过程中存在平行反应、载氧体颗粒内部传质阻力等因素,造成载氧体的失活和载氧能力下降.故为得到高的CO2收率和碳转化率,煤/载氧体质量比应控制在0.14以下.
화학련연소기술축점발전성위일항비상유전경적실현CO2고효저능모분리포집기술.재소형고정상상연구료렴개개기재양체적환원/양화반응특성이급지속순배능력,토론료온도、압력、매/재양체질량비대개기재양체반응특성적영향.시험결과표명,온도화압력적승고능현저증강매기화산물여CaSO4지간적반응,도치CO2수솔화탄전화솔상응증가.재매/재양체고질량비정황하,유우실제반응과정중존재평행반응、재양체과립내부전질조력등인소,조성재양체적실활화재양능력하강.고위득도고적CO2수솔화탄전화솔,매/재양체질량비응공제재0.14이하.
Chemical-looping combustion（CLC） will be a very promising technology due to its high efficiency and low-cost for CO2 separation.In this paper,the reduction/oxidation characteristic as well as the cyclic performance of low-cost calcium-based oxygen carrier was investigated in a bench-scale fixed-bed reactor.The effect of temperature,operating pressure and coal/oxygen carrier mass ratio on the performance of calcium-based oxygen carrier were discussed.The results showed that increasing temperature and pressure can obviously enhance the reaction of calcium-based oxygen carrier with coal gasification products,which can lead to higher CO2 yield and carbon conversion.Such factors as the parallel reactions and the resistance of internal mass transfer in the oxygen carrier particles in practical reaction lead to inactivation of the oxygen carrier and the decrease of the oxygen carring ability.The coal/oxygen carrier mass ratio should be limited to 0.14 to get higher CO2 yield and carbon conversion.