深层煤炭热解反应特征及影响因素研究OA

Underground coal gasification(UCG)is an efficient method to directly convert deep coal into coalbed methane(CBM),meeting energy needs while reducing environmental impact.In order to effectively utilize deep coal resources,this study used deep coal from the Liaohe Basin as an example to clarify pyrolysis reaction characteristics and influencing factors in the deep coal gasification process.Experiments were conducted to investigate the effects of heating rate and pressure on the pyrolysis behavior and product characteristics of coal samples,and to explore the patterns of gas release during pyrolysis and the variations in product composition.The results show that for Liaohe deep coal,the optimal heating rate is 10℃/min,at which the semi-coke yield increases significantly with increas-ing pressure.Pressure has a notable influence on the composition of gaseous products:at 0.1 MPa,the pyrolysis gas consists mainly of H2 and CO,whereas at 4.0 MPa the CH4 content is highest at 47.2%.This study provides theo-retical support and technical reference for the underground coal gasification of deep coal in the Liaohe Basin.