摘要
燃煤化学链燃烧技术在实现煤炭高效利用的同时有效降低了CO_2的捕集能耗,是当前具有发展前景的第二代碳捕集技术。现有的研究主要从宏观层面评价燃煤化学链燃烧系统的反应性能,而从"结构与反应性"的角度进行综合评价的研究很少。围绕煤、载氧体和反应器三大系统核心,分析了煤种及其附属产物(煤灰、硫和氮)对燃煤化学链燃烧系统反应性能的影响;基于现有的载氧体开发类型及提高煤气化速率的载氧体改性方法,提出廉价、高效载氧体的规模化制备是未来载氧体研发的重点和难点;探讨了各种类型反应器的结构对煤、载氧体颗粒混合和反应的影响,指出反应器开发过程中存在的主要问题及未来的发展方向。
Coal-fueled chemical-looping combustion(CF-CLC),characterized as the second generation of carbon capture technology,is promising by virtue of its efficient utilization of coal and CO_2 capture at low cost. Based on the three key system components of coal,oxygen carrier and reactor,the effects of coal type and the associated products(coal ash,sulfur and nitrogen) on the reaction performance of CF-CLC system are analyzed. Based on the existing oxygen carrier types and the modification methods of oxygen carrier to enhance the coal gasification rate,the emphasis and difficulty of oxygen carrier development in future is to prepare low-cost oxygen carrier with high performance in large scale. The effect of reactor structure on the mixing and reaction of coal with oxygen carrier particles is discussed from the perspective of structure and reactivity,and the existing major problems and future development direction concerning on the reactor development are also pointed out.
出处
《热能动力工程》
CAS
CSCD
北大核心
2017年第4期1-12,共12页
Journal of Engineering for Thermal Energy and Power
基金
国家杰出青年科学基金资助项目(51525601)
国家自然科学基金资助项目(51476035)
关键词
CO2捕集
化学链燃烧
煤
载氧体
反应器
研究进展
CO2 capture
chemical-looping combustion coal
oxygen carrier
reactor
research development
