中文摘要：

以碳酸钾为催化剂,用热天平的等温热重法研究了四种不同变质程度煤焦常压下水蒸气催化气化反应动力学。在加和不加碳酸钾条件下,测定了温度为700~850℃煤焦的化学反应控制条件下的碳转化率与时间的关系。碳酸钾催化剂的加入对变质程度越高煤的气化催化作用越大。加碳酸钾的碳转化率与时间的关系用混合模型和修正随机孔模型可以良好的拟合关联,均相模型关联较差。利用修正随机孔模型拟合关联出了四种煤焦催化水蒸气气化反应的活化能和指前因子,活化能为90.317~167.861 kJ/mol,指前因子和活化能之间具有补偿效应。

英文摘要：

The steam gasification kinetics of four different metamorphosed coals at mid-temperature （700 ~ 850 ℃ ） using potassium carbonate as catalyst was investigated with the isothermal thermogravimetric analysis under ambient pressure. The results show that the catalysis is greater for the high metamorphosed coal gasification. The integrated model and modified random pore model are good to correlate the relationships between carbon conversion and time for the case with potassium carbonate catalyst. However, the volumetric reaction model is poor in the fitting of data. The activity energy and pre-exponential factor were predicted from the modified random pore model. The activity energy of coal char catalytic gasification ranges from 90. 317 ~ 167. 861 kJ/mol. And there are compensation effects between reaction activity energy and pre-exponential factor.