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{"title":"Microbial impact on basalt-water-hydrogen system: Insights into wettability, capillary pressure, and interfacial tension for subsurface hydrogen storage","authors":"Adnan Aftab, Ahmed Al-Yaseri, Alexis Nzila, Jafar Al Hamad, Mohammad Sarmadivaleh","doi":"10.1002/ghg.2277","DOIUrl":null,"url":null,"abstract":"<p>Hydrogen (H<sub>2</sub>) fuel is assessed to be a major component of sustainable energy systems in the net-zero world. However, hydrogen storage is challenging and requires safe and environmentally friendly solutions like H<sub>2</sub> geo-sequestration. This study evaluates the effects of sulphate-reducing bacteria (SRB) on H<sub>2</sub> geological storage potential in the basalt rock. Fourier-transform infrared spectroscopy (FTIR) findings show the presence of significant components, that is, O-Si-O and organic functional groups, that is, aromatics, amine salts, alkane, and cyclohexane in the basalt rock immersed in the nutrient solution without SRB. However, we found that C-H stretching modes of organics with peaks at 1,465 cm<sup>−1</sup> were observed. Consequently, amine salt (N-H) (850–750 cm<sup>−1</sup>), solvent impurities (C-H), and alkane spectrums are components of nutrient solutions and can be results of metabolic microbial activity that can influence on the surface of the basalt rock. Hence, these changes indicate the presence of microbial activity which might affect the surface chemistry of the rock leading to wettability alteration. We observed that the contact angle (θ) of brine-H<sub>2</sub> on the rock surface slightly changed from 500 to 4,000 psi pressure after the effect of bacteria at 50 °C. The wettability changed the surface of the rock from strong water-wet to weak or intermediate water-wet condition (i.e., θ < 75°) at 4,000 psi and temperatures 25 and 50 °C after the bacteria effect. The affiliation of brine water reduces on the rock surface with increasing temperatures and pressures, even without microbial influence. Additionally, we investigated interfacial tension and capillary pressure on SRB bacteria treated basalt which is not yet reported in the published work. Interfacial tension (IFT) and <i>P<sub>c</sub></i> of H<sub>2</sub> were reduced by 19% and 65%, respectively at 50 °C and 4,000 psi after the bacteria effect. Hence, the above findings could help to answer the key factors of the reservoir rock including wettability, capillary pressure, and interfacial tension to plan a field-scale H<sub>2</sub> geo-sequestration strategy under the influence of biotic life. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":"14 3","pages":"546-560"},"PeriodicalIF":2.7000,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ghg.2277","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Greenhouse Gases: Science and Technology","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ghg.2277","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
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Abstract
Hydrogen (H2 ) fuel is assessed to be a major component of sustainable energy systems in the net-zero world. However, hydrogen storage is challenging and requires safe and environmentally friendly solutions like H2 geo-sequestration. This study evaluates the effects of sulphate-reducing bacteria (SRB) on H2 geological storage potential in the basalt rock. Fourier-transform infrared spectroscopy (FTIR) findings show the presence of significant components, that is, O-Si-O and organic functional groups, that is, aromatics, amine salts, alkane, and cyclohexane in the basalt rock immersed in the nutrient solution without SRB. However, we found that C-H stretching modes of organics with peaks at 1,465 cm−1 were observed. Consequently, amine salt (N-H) (850–750 cm−1 ), solvent impurities (C-H), and alkane spectrums are components of nutrient solutions and can be results of metabolic microbial activity that can influence on the surface of the basalt rock. Hence, these changes indicate the presence of microbial activity which might affect the surface chemistry of the rock leading to wettability alteration. We observed that the contact angle (θ) of brine-H2 on the rock surface slightly changed from 500 to 4,000 psi pressure after the effect of bacteria at 50 °C. The wettability changed the surface of the rock from strong water-wet to weak or intermediate water-wet condition (i.e., θ < 75°) at 4,000 psi and temperatures 25 and 50 °C after the bacteria effect. The affiliation of brine water reduces on the rock surface with increasing temperatures and pressures, even without microbial influence. Additionally, we investigated interfacial tension and capillary pressure on SRB bacteria treated basalt which is not yet reported in the published work. Interfacial tension (IFT) and Pc of H2 were reduced by 19% and 65%, respectively at 50 °C and 4,000 psi after the bacteria effect. Hence, the above findings could help to answer the key factors of the reservoir rock including wettability, capillary pressure, and interfacial tension to plan a field-scale H2 geo-sequestration strategy under the influence of biotic life. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.
微生物对玄武岩-水-氢系统的影响:对地下储氢的润湿性、毛细管压力和界面张力的见解
据评估,氢(H2)燃料是零净世界可持续能源系统的主要组成部分。然而,氢的储存具有挑战性,需要安全、环保的解决方案,如氢的地质封存。本研究评估了硫酸盐还原菌(SRB)对玄武岩中氢气地质封存潜力的影响。傅立叶变换红外光谱(FTIR)研究结果表明,浸泡在无 SRB 营养液中的玄武岩中存在重要成分,即 O-Si-O 和有机官能团,即芳烃、胺盐、烷烃和环己烷。然而,我们发现有机物的 C-H 伸展模式在 1,465 cm-1 处出现了峰值。因此,胺盐(N-H)(850-750 cm-1)、溶剂杂质(C-H)和烷烃光谱是营养液的成分,可能是微生物代谢活动的结果,会对玄武岩表面产生影响。因此,这些变化表明存在微生物活动,可能会影响岩石的表面化学,导致润湿性改变。我们观察到,在 50 °C 的条件下,受细菌影响后,盐水-H2 在岩石表面的接触角(θ)从 500 psi 压力到 4,000 psi 压力略有变化。细菌作用后,在压力 4,000 psi、温度 25 和 50 °C条件下,岩石表面的润湿性从强水湿状态变为弱水湿或中等水湿状态(即θ < 75°)。即使没有微生物的影响,随着温度和压力的升高,盐水在岩石表面的隶属度也会降低。此外,我们还研究了经 SRB 细菌处理的玄武岩的界面张力和毛细管压力,这在已发表的研究中尚未见报道。在 50 °C 和 4,000 psi 条件下,经细菌作用后,H2 的界面张力(IFT)和毛细管压力(Pc)分别降低了 19% 和 65%。因此,上述发现有助于回答储层岩石的关键因素,包括润湿性、毛细管压力和界面张力,从而规划生物影响下的野外规模 H2 地球封存战略。© 2024 化学工业协会和约翰-威利父子有限公司版权所有。
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