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Low carbon renewable natural gas production from coalbeds and implications for carbon capture and storage

机译:煤层气生产低碳可再生天然气及其对碳捕获和储存的影响

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摘要

Isotopic studies have shown that many of the world’s coalbed natural gas plays are secondary biogenic in origin, suggesting a potential for gas regeneration through enhanced microbial activities. The generation of biogas through biostimulation and bioaugmentation is limited to the bioavailability of coal-derived compounds and is considered carbon positive. Here we show that plant-derived carbohydrates can be used as alternative substrates for gas generation by the indigenous coal seam microorganisms. The results suggest that coalbeds can act as natural geobioreactors to produce low carbon renewable natural gas, which can be considered carbon neutral, or perhaps even carbon negative depending on the amount of carbon sequestered within the coal. In addition, coal bioavailability is no longer a limiting factor. This approach has the potential of bridging the gap between fossil fuels and renewable energy by utilizing existing coalbed natural gas infrastructure to produce low carbon renewable natural gas and reducing global warming.
机译:同位素研究表明,世界上许多煤层气矿床都是次生生物成因的,这表明通过增强微生物活动来进行天然气再生的潜力。通过生物刺激和生物强化产生沼气仅限于煤衍生化合物的生物利用度,被认为是碳阳性的。在这里,我们表明,植物来源的碳水化合物可用作原生煤层微生物产生气体的替代底物。结果表明,煤层可以作为天然的地球生物反应器来生产低碳可再生天然气,根据煤中固存的碳量,可将其视为碳中性,甚至是负碳。另外,煤的生物利用度不再是限制因素。通过利用现有的煤层气基础设施来生产低碳可再生天然气并减少全球变暖,这种方法具有弥合化石燃料与可再生能源之间差距的潜力。

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