The ignition and combustion characteristics of anthracite-rice husk (AC-RH) and bituminous coal-rice husk (BC-RH) pellets were investigated in a vertical heating tube furnace under different experimental condition, for gas temperature (873 K–1073 K) and under air and different oxygen concentration (21–70%) in CO₂/O₂ atmosphere. The investigation of the ignition and combustion characteristics focused on ignition mechanism, ignition delay, ignition temperature and combustion process. AC-RH pellets had two ignition mechanism in CO2/O2 atmosphere: homogeneous ignition of volatile and heterogeneous ignition of char. Heterogeneous ignition region decreased while homogeneous ignition increased as rice husk blending ratio increased in oxygen concentration-gas temperature plane. Only homogeneous ignition was observed when rice husk blending ratio was 30%. As for BC-RH pellets, only homogeneous ignition occurred in all experimental conditions. The effect of the rice husk blending on the anthracite was more pronounced than the bituminous coal for ignition mechanism. As oxygen concentration increased, a significant reduction in ignition delay and ignition temperature was observed at low rice husk blending ratio and low gas temperature. but at 1073 K, high oxidizer temperature weakened the effect of biomass blending and oxygen concentration on ignition delay and ignition temperature. Meanwhile, at 20% and 30% rice husk blending ratio, it also weakened the effect of oxygen concentration and oxidizer temperature on ignition delay and ignition temperature. In contrast, blending ratio had a more significant effect on ignition behavior. The replacement of N₂ by CO₂ at the same oxygen concentration contributed to an increase in ignition delay time and internal ignition temperature, which suppressed the ignition behavior. Different ignition mechanisms corresponded to different combustion processes.

在不同的实验条件下，针对气体温度（873 K–1073 K），研究了无烟煤稻壳（AC-RH）和烟煤煤壳（BC-RH）颗粒的着火和燃烧特性。以及在空气和CO ₂ / O _2中不同的氧气浓度（21–70％）下大气层。对点火和燃烧特性的研究主要集中在点火机理，点火延迟，点火温度和燃烧过程上。AC-RH颗粒在CO2 / O2气氛中有两种着火机理：挥发物的均质着火和炭的异质着火。在氧气浓度-气体温度平面内，稻壳混合比增加，异质着火区域减小，均质着火增加。当稻壳混合比例为30％时，仅观察到均匀的着火。对于BC-RH颗粒，在所有实验条件下均仅发生均质着火。稻壳掺混对无烟煤的影响比烟煤对点火机理的影响更为明显。随着氧气浓度的增加，在低稻壳混合比和低气体温度下，观察到点火延迟和点火温度的显着降低。但是在1073 K时，较高的氧化剂温度减弱了生物量混合和氧气浓度对点火延迟和点火温度的影响。同时，在稻壳混合比为20％和30％的情况下，它也减弱了氧气浓度和氧化剂温度对点火延迟和点火温度的影响。相反，混合比对着火行为具有更显着的影响。N的替代 它也减弱了氧气浓度和氧化剂温度对点火延迟和点火温度的影响。相反，混合比对着火行为具有更显着的影响。N的替代 它也减弱了氧气浓度和氧化剂温度对点火延迟和点火温度的影响。相反，混合比对着火行为具有更显着的影响。N的替代_另外，在相同的氧浓度下，CO ₂引起的点火延迟时间和内部点火温度的增加，导致抑制了点火行为，因此如图2所示。不同的点火机制对应于不同的燃烧过程。