Microbially enhanced coalbed methane production in laboratory

摘要

Microbial methane is a very important unconventional natural gas, and natural gas at least 20% is biogenic origin in worldwide. Which study has important academic significance and practical value. Paper based on the theory of microbial methane generation, the lignite and gangue from Yima mine area, Western Henan province, were investigated in different ratios for their ability to support microbially enhanced coalbed methane production in laboratory. The results show that the organic matters in coal and gangue can be used to produce miciobical methane by microorganisms, and gas production are range from 2.35 mL/g to 3. 50 mL/g and methane content is range from 66. 56% to 78. 34%, which methane carbon isotope is-6. 54% to-5. 87%. And the results also show that under the miciobes actions, higher coal content in samples have much gases production in amount, but the fixed carbon be used to generate methane is lower; and higher gangue content in samples have fewer gases production in amount, but the fixed carbon be used to generate methane is higher. This recognization provide a scientific foundation for microbially enhanced coalbed methane production.