Subsurface Microbial Hydrogen Cycling: Natural Occurrence and Implications for Industry

Gregory, Simon P.; Barnett, Megan J.; Field, Lorraine; Milodowski, Antoni E.

doi:10.3390/microorganisms7020053

Cited by 142 publications

(113 citation statements)

References 179 publications

(237 reference statements)

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“…Heterotrophy seems to result in larger fractionation towards lower values compared to autotrophy, while the lower values coincide with abiotic fractionation [109]. In summary, the origin of H 2 in non-serpentinized hosted subsurface environments is seldom discussed in detail and it is difficult to deduce the origin geochemically [30].…”

Section: H 2 -Content Of Spheriodal Type III Inclusionsmentioning

confidence: 99%

“…A biological origin of the H 2 would be a possible alternative considering the biological origin of the inclusions. In a microbiological context, the ability to produce H 2 is usually coupled to fermentation and has been observed in a relatively large number of microorganisms, usually linked to strict or facultative anaerobic metabolism among heterotrophs or photosynthesizers [30,110]. Biological production of H 2 is mediated by the enzyme hydrogenase, which catalyzes the reaction, in [111] 2e + 2H + → H 2 (2) This reaction reflects the ability of microorganisms to dispose "excess" electrons in the form of molecular hydrogen.…”

Section: H 2 -Content Of Spheriodal Type III Inclusionsmentioning

confidence: 99%

“…In addition to abiotic production of H 2 , biological production may occur in anoxic to suboxic environments by bacterial fermentation [1]. However, biological production of H 2 is rarely regarded as an important contributor to the main H 2 pool [30]. Besides, biologically produced H 2 is almost always considered to be produced by bacteria [1].…”

Section: Introductionmentioning

confidence: 99%

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Exceptional Preservation of Fungi as H2-Bearing Fluid Inclusions in an Early Quaternary Paleo-Hydrothermal System at Cape Vani, Milos, Greece

et al. 2019

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The production of H2 in hydrothermal systems and subsurface settings is almost exclusively assumed a result of abiotic processes, particularly serpentinization of ultramafic rocks. The origin of H2 in environments not hosted in ultramafic rocks is, as a rule, unjustifiably linked to abiotic processes. Additionally, multiple microbiological processes among both prokaryotes and eukaryotes are known to involve H2-production, of which anaerobic fungi have been put forward as a potential source of H2 in subsurface environments, which is still unconfirmed. Here, we report fungal remains exceptionally preserved as fluid inclusions in hydrothermal quartz from feeder quartz-barite veins from the Cape Vani Fe-Ba-Mn ore on the Greek island of Milos. The inclusions possess filamentous or near-spheroidal morphologies interpreted as remains of fungal hyphae and spores, respectively. They were characterized by microthermometry, Raman spectroscopy, and staining of exposed inclusions with WGA-FITC under fluorescence microscopy. The spheroidal aqueous inclusions interpreted as fungal spores are unique by their coating of Mn-oxide birnessite, and gas phase H2. A biological origin of the H2 resulting from anaerobic fungal respiration is suggested. We propose that biologically produced H2 by micro-eukaryotes is an unrecognized source of H2 in hydrothermal systems that may support communities of H2-dependent prokaryotes.

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Section: H 2 -Content Of Spheriodal Type III Inclusionsmentioning

confidence: 99%

Section: H 2 -Content Of Spheriodal Type III Inclusionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exceptional Preservation of Fungi as H2-Bearing Fluid Inclusions in an Early Quaternary Paleo-Hydrothermal System at Cape Vani, Milos, Greece

et al. 2019

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“…Salt caverns are compatible with hydrogen storage, ensuring long-term stability and great tightness [751]. The storage in aquifers and depleted oil and gas reservoirs is also possible, but hazards are related to chemical reactions with minerals, residual oils and biological microorganisms (bacteria and archaea) [752,753]. In 2013, the energy company RAG (Rohöl-Aufsuchungs Aktiengesellschaft) and its project partners started the project Underground Sun Storage to verify the feasibility of gas storage with up to 10% of hydrogen content into underground storage facilities [754].…”

Section: Hydrogenmentioning

confidence: 99%

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

et al. 2020

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Innovative renewable routes are potentially able to sustain the transition to a decarbonized energy economy. Green synthetic fuels, including hydrogen and natural gas, are considered viable alternatives to fossil fuels. Indeed, they play a fundamental role in those sectors that are difficult to electrify (e.g., road mobility or high-heat industrial processes), are capable of mitigating problems related to flexibility and instantaneous balance of the electric grid, are suitable for large-size and long-term storage and can be transported through the gas network. This article is an overview of the overall supply chain, including production, transport, storage and end uses. Available fuel conversion technologies use renewable energy for the catalytic conversion of non-fossil feedstocks into hydrogen and syngas. We will show how relevant technologies involve thermochemical, electrochemical and photochemical processes. The syngas quality can be improved by catalytic CO and CO2 methanation reactions for the generation of synthetic natural gas. Finally, the produced gaseous fuels could follow several pathways for transport and lead to different final uses. Therefore, storage alternatives and gas interchangeability requirements for the safe injection of green fuels in the natural gas network and fuel cells are outlined. Nevertheless, the effects of gas quality on combustion emissions and safety are considered.

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“…Some continental natural hydrogen seeps have been discovered (Larin et al, 2015;Deville, 2015, Prinzhofer et al, 2019) but we are far from understanding hydrogen sources, hydrogen migration and hydrogen behavior in the subsurface. (Nivin, 2016;Gregory et al, 2019). The interest for the topic was renewed recently and suffers from poor data sets.…”

Section: Introductionmentioning

confidence: 99%

Vaux-en-Bugey (Ain, France): the first gas field produced in France, providing learning lessons for natural hydrogen in the sub-surface?

Deronzier¹,

Giouse

2020

BSGF - Earth Sci. Bull.

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The former Vaux-en-Bugey field, first French methane production from early 20th century, is revisited as a case study to address the present generation and accumulation theories for gases like hydrogen and helium. The volume of the initial gas in place is estimated to be 22 million m3. Based on a composition of 5% of hydrogen and 0.096% of helium, the volumes of these gases in the field were respectively around 1.1 million m3 for hydrogen and 24 000 m3 for helium. The different hypotheses of hydrogen sources are reviewed: serpentinization, hydro-oxidation of siderite, water radiolysis, bio-fermentation, mechanical generation, degassing from depth trough faults, steel corrosion. For helium generation, the different sources of radioactive minerals and intermediate accumulations are examined. The most probable scenario is the hydrogen production by water radiolysis and helium production by radioactive decay in or near the basement, migrating trough deep faults, stored and concentrating in an aquifer with thermogenic methane, then flushed by methane into the gas field, during Jura thrusting. New measurements with portable gas detector, incomplete but including hydrogen, on a former exploration well with accessible flux of gas, give the opportunity to comment gas saturation evolution more than a century after the 1906 discovery. The decreasing of hydrogen content since the discovery of the field is probably due to Sulphate-Reducing Bacteria activity.

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Subsurface Microbial Hydrogen Cycling: Natural Occurrence and Implications for Industry

Cited by 142 publications

References 179 publications

Exceptional Preservation of Fungi as H2-Bearing Fluid Inclusions in an Early Quaternary Paleo-Hydrothermal System at Cape Vani, Milos, Greece

Exceptional Preservation of Fungi as H2-Bearing Fluid Inclusions in an Early Quaternary Paleo-Hydrothermal System at Cape Vani, Milos, Greece

Green Synthetic Fuels: Renewable Routes for the Conversion of Non-Fossil Feedstocks into Gaseous Fuels and Their End Uses

Vaux-en-Bugey (Ain, France): the first gas field produced in France, providing learning lessons for natural hydrogen in the sub-surface?

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