Estimating microbial growth and hydrogen consumption in hydrogen storage in porous media
Estimating microbial growth and hydrogen consumption in hydrogen storage in porous media
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DOI：
10.1016/j.rser.2021.111481
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发表时间：
2021-08-09
影响因子：
15.9
通讯作者：
Edlmann，Katriona
中科院分区：
文献类型：
--
作者：
Thaysen，Eike M.;McMahon，Sean;Edlmann，Katriona
建议在地下储存氢气，例如在枯竭的油气田（DOGF），作为克服可再生能源部门供需不平衡的一种手段。然而，氢气是地下微生物过程的电子供体，这可能对氢气回收、气体注入和腐蚀具有重要意义。本文综述了地下三种主要的耗氢过程——甲烷生成、均质丙酮生成和硫酸盐还原的控制，以此作为估计地质储氢微生物生长风险的基础。对42个DOGF的数据进行评估后发现，由于温度在50 ~ 122°C之间，其中5个区域的耗氢微生物可能被认为是无菌的。由于其他油田的温度、盐度或压力限制，只有6个DOGF可以维持所有的耗氢过程。我们计算出DOGF的潜在微生物生长量为1-17 *107cells ml - 1，具有良好的微生物生长条件，生长细胞需要0.1-19天，静息细胞需要0.2-6.6年。相关的氢消耗可以忽略不计（< 0.01-3.2%的储存氢）。我们的研究结果可以帮助决定未来氢气将储存在哪里。
Subsurface storage of hydrogen, e.g. in depleted oil and gas fields (DOGF), is suggested as a means to overcome imbalances between supply and demand in the renewable energy sector. However, hydrogen is an electron donor for subsurface microbial processes, which may have important implications for hydrogen recovery, gas injectivity and corrosion. Here, we review the controls on the three major hydrogen consuming processes in the subsurface, methanogenesis, homoacetogenesis, and sulfate reduction, as a basis to estimate the risk for microbial growth in geological hydrogen storage. Evaluating our data on 42 DOGF showed that five of the fields may be considered sterile with respect to hydrogen-consuming microorganisms due to temperatures >122 °C. Only six DOGF can sustain all of the hydrogen consuming processes, due to either temperature, salinity or pressure constraints in the remaining fields. We calculated a potential microbial growth in the order of 1–17*107cells ml−1for DOGF with favorable conditions for microbial growth, reached after 0.1–19 days for growing cells and 0.2–6.6 years for resting cells. The associated hydrogen consumption is negligible to small (<0.01–3.2% of the stored hydrogen). Our results can help inform decisions about where hydrogen will be stored in the future.