A 50 kW_th chemical looping combustion (CLC) reactor for coal has been successfully constructed and operated. A turbulent fluidized bed acts as the air reactor (AR) to achieve high solid circulation rate, while a bubbling fluidized bed operates as the fuel reactor (FR) to guarantee sufficient solid residence time. Two risers are separately connected to the AR and FR to provide the driving force for oxygen carrier (OC) circulation. A four-chamber loop seal (LS) is installed between AR and FR, playing the roles of a gas-sealing configuration and also a carbon stripper to convert unreacted char.

Low-cost natural hematite was used as OC and Shenhua bituminous coal was used as fuel. A series of tests was conducted to investigate the performance of the newly constructed CLC reactor under different operational parameters. Effects of temperature, inlet gas velocity and H₂O concentration in fluidizing agent, on the performance of the CLC reactor were investigated. The relatively stable pressure drop attained in the FR indicated successful operation of the CLC system. During 120 min continuous running with a bed inventory of 100 kg in FR, the highest CO₂ yield reached to 0.91 and the combustion efficiency was 0.86 at 1000 °C.

甲50千瓦_个化学循环燃烧（CLC）反应器中的煤已经成功地构建和操作。湍流床用作空气反应器（AR）以实现较高的固体循环速率，而鼓泡流化床用作燃料反应器（FR）以确保足够的固体停留时间。两个立管分别连接到AR和FR，以提供氧气载体（OC）循环的驱动力。在AR和FR之间安装了一个四腔回路密封垫（LS），起着气体密封结构的作用，还起到了脱碳剂的作用，以转化未反应的焦炭。

低成本天然赤铁矿用作超滤，神华烟煤用作燃料。进行了一系列测试，以研究新建的CLC反应器在不同运行参数下的性能。研究了温度，入口气体流速和流化剂中H ₂ O浓度对CLC反应器性能的影响。FR中获得的相对稳定的压降表明CLC系统成功运行。在120分钟的连续运行（床中存有100 kg FR）的过程中，最高的CO ₂产量达到0.91，在1000°C下的燃烧效率为0.86。