Influencing factors and utilization pathways of methane emission in coal industry
Methane emissions have a significant impact on global climate change,and China's associated coalbed methane reserves and extraction volume are in the front row in the world.Therefore,a systematic review of the cur-rent situation of methane emissions in China's coal industry,its influencing factors and utilization pathways can pro-vide a scientific basis and policy recommendations for the industry's green development and methane emissions con-trol,and promote the realization of China's carbon-neutral goal of achieving carbon peaks.The distribution charac-teristics of CBM in China are summarized,and the resource characteristics of CBM in China are analyzed from the as-pects of CBM resource distribution and burial depth distribution;the micro and macro influences on methane emission in the coal industry are summarized,and the factors influencing methane emission are dissected from the micro point of view,including the thickness of the bottom sandstone,the pressure of CBM,the top plate lithology,the geolog-ical conditions of the mining technology and the depth of the mining,the influence of the coal production.It also ana-lyzes the influence of coal quality factors on methane retention and emission,and from a macro perspective,it is pointed out that the increase of coal production will lead to the increase of methane emission,while the change of en-ergy structure,especially the new energy substitution,and the implementation of strict industrial policies will help to reduce the methane emission;from the aspects of extraction,purification and utilization technologies of coalbed methane,the technical approach and feasibility of methane emission reduction are deeply discussed,the trend of coal methane emissions are sort out.Through comprehensive analysis,a series of comprehensive control strategies for methane emissions in the coal industry are proposed,including energy structure transformation,coal consumption control,methane emission reduction technological innovation and policy promotion,etc.For example,the changes in methane emissions caused by changes in coal production structure,the research and development of gas cascade u-tilization technology,the improvement of utilization efficiency of underground gas extraction,the achievement of effi-cient utilization of sources;the monitoring and management of methane emissions should be strengthened step by step to implement the main responsibility of coal enterprises through the implementation of policy constraints.By imple-menting monitoring of methane emission data,we need to strengthen the trend analysis of methane emissions from a macro perspective,in order to provide support and basis for the formulation of national policies and laws and regula-tions.
methane emissionscoalbed methanedistribution characteristicsinfluencing factorsutilization pathwaysemission trendsemission reduction technologiescoal industry
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