中文摘要：

通过自行研制的煤炭地下气化模拟试验系统，采用富氧空气／水蒸气两阶段气化工艺，完成了鹤壁煤的地下气化模型试验。文章就试验不同阶段的煤气组成、热值变化和气化过程的稳定性特征进行分析，结果如下：鹤壁煤地下气化水煤气平均热值达11．85 MJ／m3，空气煤气热值为4—6 MJ／m3，水煤气中氢气最高体积分数超过80％，相应的煤气热值达到12．91 MJ／m3；适当增大鼓风量有利于高温温度场的快速建立与恢复，试验条件下，最佳鼓风量为20 m3／h，最佳蒸汽流量为0．26 m3／h。试验为煤炭地下气化制氢提供了有力依据。

英文摘要：

Through the self-designed underground gasification model test system , the underground gasification test of Hebi coal was carried out by applying two-stage coal gasification （ oxygen-enriched air ＆ steam gasification ） .By analyzing the gasifying procedure simultaneously , gas composition , the variation of corresponding calorific values and their stability characteristics in different test stages were obtained .The results conclude that the average calorific values of water gas are proved to be 11.85 MJ/m3 when feeding steam, and calorific values are distributed over 4-6 MJ/m3 with oxygen-enriched air as gasification agent .The highest hydrogen volume fraction in water gas exceeds 80%, and the calorific value of which can be 12.91 MJ/m3 .It also shows that the high temperature field can be quickly founded or recovered by increasing the flow rate of air properly .The optimum flow rates of air and steam are 20 m3/h and 0.26 m3/h respectively under the tested conditions .The model test provides a strong evidence for UCG to produce hydrogen .