我国以褐煤和次烟煤为代表的低阶煤储量占55%以上，开展低阶煤气化的基础研究十分必要。煤阶特性决定了低阶煤可以通过低温气化提高效率，其核心是煤焦的气化反应性。 本项目以我国准东煤为代表的高灰熔点低阶煤样为对象，研究低温气化中煤焦的气化反应性，分析该典型煤质在热解、煤焦气化反应过程中气态挥发物和煤焦的相互作用规律，以及AAEM对煤焦气化反应性的影响规律，重点研究AAEM的催化作用与AAEM赋存、迁徙、挥发分析出过程和煤焦结构之间的相互关系，揭示气化温度、停留时间、煤焦物理化学结构对煤焦气化反应性的影响，以期望在煤结构化学和化学动力学的层面对煤焦的气化反应性有更加深入的认识。 通过本项目研究，有望进一步丰富和完善现有的关于低阶煤焦炭气化反应动力学的理论，为低阶燃料气化科学的发展提供新的科学数据，并填补国际上对次烟煤低温气化过程研究的空白，为未来我国低阶煤或者高灰熔点煤气化技术的研发提供理论基础。

The reserve of low-rank coal, typically of lignite and sub-bituminous coal is up to 55% in China, which makes the basic study on low-rank coal indispensable. Low-rank coal, owing to its coal rank characteristics, can be well gasified at relative low temperature, wherein the key point is the reactivity of char gasification. In this proposal, a type of low-rank coal from Eastern Junggar coalmine, China, will be used as sample to study the reactivity of char at low temperature, analysing the interaction of volatiles and char during pyrolysis and char gasification, as well as the effects of AAEM on char reactivity. The study will mainly focus on the relationship of AAEM catalysis, AAEM occurrence and migration, volatilisation and char structure, so as to discover the effects of gasification temperature, holding time, physiochemical structure on the gasification reactivity of char. A further understanding, on the basis of coal chemistry and chemical kinetics, to the char reactivity is expected to be achieved from the above study meanwhile. This study is also expected to enrich and improve the current theory on low-rank coal gasitification reactivity, providing new data evidences for the science of low-rank coal gasification, and filling the study vacuum on low-temperature gasification for sub-bituminous coal, which will further become the theoretical basis of the R&D of gasification technologies for low-rank coal or high-melting-point coal in China.