Abstract:

Chemical looping technology is currently one of the hotspots in energy technology research. Its key technologies include the preparation of carrier materials and the design of reactors. In this paper, application prospects of chemical looping were described. The design principles of chemical looping reactor were summarized. The chemical looping reactors reported in concepts, in building or in operation were reviewed. The purposes and design criteria were discussed. Flow patterns, reaction mechanisms and control characteristics during operation should be investigated in macroscopic reactor when using micro/nano-particles as looping materials. Hydrodynamic, mass transfer, heat and reaction coupling mechanism in reactor should be studied and reaction-to-reactor multi-scale model should be constructed. Fully scaled chemical looping reactor by self-heat balance should be tested. More attentions should be paid to the development of efficient carbon/ash stripper with aid of numerical simulation in the future.

Key words: chemical looping, reactor, gas-solid reaction, carbon/ash stripper, meso-scale

摘要：

化学链技术是目前能源技术研究的热点之一，其关键技术包括载体材料的制备和反应器的设计。综述了化学链技术的应用前景，总结了化学链反应器设计原理，回顾了目前世界上公开报道的设计完成、在建或已经运行的化学链反应器，归纳讨论了不同反应器设计细节的共同点及目的。开展以微小颗粒、纳米颗粒作为载体材料时，颗粒聚团在宏观反应器尺度下的流动传递规律、循环反应机理和系统运行控制特性的研究；开展反应器内颗粒流动-传递-反应耦合机制研究，建立多尺度统一模型；在全尺寸化学链反应器上进行系统自热实验研究；利用数值模拟方法研究和开发用于固体燃料转化过程的高效炭/灰分离器是未来化学链反应器发展需要关注的几个方面。

关键词: 化学链, 反应器, 气固反应, 炭/灰分离器, 介尺度