中文摘要：

分别以H2O（g）和CO2为气化剂,采用自制的煤炭地下气化模拟试验装置和GC-MS分析仪,研究粒径为5~10,mm的大颗粒内蒙褐煤、鹤壁烟煤和晋城无烟煤在不同气化温度下气化的煤气洗涤水中有机污染物组成.结果表明：随着气化温度的升高,煤气洗涤水中的各类酚不断增多,甲苯、萘和醚类化合物则不断减少,杂环化合物的变化较复杂,适当控制气化温度可以有效降低煤炭地下气化对地下水的有机污染程度;气化剂为H2O（g）时萘和各类酚含量均高于气化剂为CO2时的含量,醚和甲苯含量则小于CO2时的含量;煤种对煤气洗涤水中有机污染物种类和含量影响较大,内蒙褐煤洗涤水中酚的含量远大于鹤壁煤和晋城煤,甲苯含量的变化顺序为晋城煤〉鹤壁煤〉内蒙煤,萘含量的变化顺序与甲苯的变化顺序相反.

英文摘要：

With CO2 and steam as gasification agents, model gasification of Neimeng lignite, Hebi bituminous coal and Jincheng anthracite with the particle size of 5—10 mm was carried out under different gasification temperatures by using self-made UCG model test system. The components of organics in gas washing water were analyzed by GCMS. The results show that, with the increase of gasification temperature within the tested temperature range, phenolic compounds in gas washing water increase constantly, whereas toluene, naphthalene and ethers compounds decline, and a complex change is also observed for heterocyclic compounds. Proper control of gasification temperature can effectively reduce the organic pollution of groundwater caused by underground coal gasification. The concentrations of phenols and naphthalene in gas washing water gasified by steam were higher than those by CO2 gasification, whereas the concentrations of ethers and toluene are just the opposite. The type and concentration of organics in gas washing water were significantly affected by coal type. The concentration of phenol in the gas washing water of Neimeng coal is much higher than that of Hebi and Jincheng coal. Jincheng anthracite shows the greatest change in the concentration of toluene in gas washing water, followed by Hebi bitumite and then Neimeng lignite. However, naphthalene shows an opposite changing trend.