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中文摘要：
为了减轻环境污染，提高煤层气产率，增加能源储备，根据煤层气地质学和生物气的基本理论，提出二氧化碳（CO2）注入煤层多种用途这一新观点。研究结果显示：煤对CO2具有很强的吸附能力，可将煤层作为CO2的储集层；煤具有优先吸附CO2而滞后吸附甲烷（CH4）的特性，向煤层注入CO2可大大提高煤层气的采收率；产甲烷菌具有利用CO2生成CH4的能力，新生成的CH4成为能源储备的有益补充。可见，CO2注入煤层不仅可有效减少温室气体的排放，强化煤层甲烷产出，而且为新能源生物CH4的生成提供了基质。
英文摘要：
In order to reduce environment pollution, improve coalbed methane recovery and increase energy reserve, this paper based on the principles of coalbed methane geology and biogenic gas, proposed a new viewpoint of multi-application of CO2 injection into coal bed. The studied results show that coal beds can be used as CO2reservoirs because coal has strong adsorption capacity for CO2; and CO2 injection into coal beds can improve coalbed methane recovery because coal is preference for CO2 adsorption and postponement for methane （CH4） adsorption; and CH4, which is a new energy generated by methanogens from CO2, is the beneficial complement of the energy. It is obvious that CO2 injection into coal beds can not only reduce the green-house gas emission and improve coalbed methane recovery, but also provide the basic material to new energy： biogenic methane.
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