The catalytic behavior of alkali vapor on unburned pulverized coal (UPC) prepared from bituminous coal, anthracite, semi coke and coke have been investigated. Experiment results show that the alkali metal vapor has catalytic effect on the gasification reaction of UPC. The catalytic effect of coke UPC is the most obvious, followed by anthracite UPC and bituminous coal UPC. Semi coke UPC is the least catalyzed by alkali metals but its gasification reactivity is the best. As the concentration of alkali metal vapor increases, the alkali metal content adsorbed by UPC increases, and there may be a phenomenon of saturated adsorption. The amount of alkali metal adsorbed is between 2% and 6%. AUPC has the highest ability to adsorb alkali metals, and SUPC is the weakest, which may be related to the minerals (CaO, Al₂O₃) in the coal ash. Changes in stomatal parameters are not the main factors affecting the catalytic effect. The results of X-ray diffraction experiments show that alkali metal aluminosilicate exists in the ash of coal after adsorption of alkali metal, and the average stack height of carbon atoms decreases significantly. The alkali metal catalytic gasification reaction is mainly achieved by destroying the carbon basic structural unit. The alkali metal nepheline and the interlayer compound may be the main catalytic substances, and the destructive ability of alkali intercalation is obviously stronger than that of alkali nepheline. The catalytic mechanism of alkali metals on unburned coal and the destruction mechanism of alkali metals on carbon crystals were discussed. It can provide reference for reducing alkali metal corrosion on coke and improving pulverized coal utilization rate.

研究了碱蒸汽对烟煤，无烟煤，半焦和焦炭制得的未燃粉煤（UPC）的催化行为。实验结果表明，碱金属蒸气对UPC的气化反应具有催化作用。焦炭UPC的催化作用最为明显，其次是无烟煤UPC和烟煤UPC。半焦UPC的碱金属催化作用最少，但其气化反应性最好。随着碱金属蒸气浓度的增加，UPC吸附的碱金属含量增加，并且可能存在饱和吸附现象。碱金属的吸附量为2％至6％。AUPC吸附碱金属的能力最高，而SUPC的能力最弱，这可能与矿物（CaO，Al ₂ O₃）在煤灰中。气孔参数的变化不是影响催化作用的主要因素。X射线衍射实验结果表明，碱金属吸附后煤灰中存在碱金属铝硅酸盐，碳原子的平均堆积高度显着降低。碱金属催化气化反应主要通过破坏碳基本结构单元来实现。碱金属霞石和中间层化合物可能是主要的催化物质，碱插层的破坏能力明显强于碱霞石。讨论了碱金属对未燃煤的催化作用机理和碱金属对碳晶体的破坏机理。