加压下中国典型煤水蒸气气化的基础研究

Fundamental research on steam gasified reactivity of typical Chinese coals under pressurized conditions

利用自行设计的加压热重固定床反应器进行了霍林河褐煤、神木烟煤和晋城无烟煤的水蒸气气化反应动力学研究,考察了反应温度、反应压力对不同煤阶煤种的水蒸气气化特性的影响。研究发现随反应温度的提高、反应压力的增加和煤阶的降低,煤焦的水蒸气气化活性明显升高,用缩核反应模型求出3种煤焦的活化能和频率因子,并给出3种煤的压力指数分别为0.244、0.256、0.286。

The steam gasified reaction kinetics of three typical Chinese coals with different coal ranks (Huolinhe lignite coal,Shenmu bituminous coal,and jincheng anthracite coal) are carried out on a self-made pressurized fixed-bed reactor.The influences of reaction temperature,pressure and coal rank on the steam gasification activities are investigated.The results show that with the increase of reaction temperature and pressure as well as the decrease of coal rank,the gasification activities increase obviously.The activation energy and the pre-exponential factor of the three types of coal char are calculated by the shrinking core model,and the pressure order of them is 0.244,0.256,and 0.286,respectively.