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Article

Sensing Hydrogen Seeps in the Subsurface for Natural Hydrogen Exploration

1
CSIRO, Energy, Kensington, WA 6151, Australia
2
CSIRO, Mineral Resources, Kensington, WA 6151, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Simone Morais
Appl. Sci. 2022, 12(13), 6383; https://doi.org/10.3390/app12136383
Received: 17 May 2022 / Revised: 15 June 2022 / Accepted: 20 June 2022 / Published: 23 June 2022
(This article belongs to the Special Issue Molecular Sensing Technologies)
The recent detection of natural hydrogen seeps in sedimentary basin settings has triggered significant interest in the exploration of this promising resource. If large economical resources exist and can be extracted from the sub-surface, this would provide an opportunity for natural hydrogen to contribute to the non-carbon-based energy mix. The detection and exploration of hydrogen gas in the sub-surface is a significant challenge that requires costly drilling, sophisticated instrumentation, and reliable analytical/sampling methods. Here, we propose the application of a commercial-based sensor that can be used to detect and monitor low levels of hydrogen gas emissions from geological environments. The sensitivity, selectivity (K > 1000), and stability (<1 ppm/day) of the sensor was evaluated under various conditions to determine its suitability for geological field monitoring. Calibration tests showed that the hydrogen readings from the sensor were within ±20% of the expected values. We propose that chemical sensing is a simple and feasible method for understanding natural hydrogen seeps that emanate from geological systems and formations. However, we recommend using this sensor as part of a complete geological survey that incorporates an understanding of the geology along with complementary techniques that provide information on the rock properties. View Full-Text
Keywords: hydrogen; sensor; seeps; environmental monitoring; soil gas; geological survey hydrogen; sensor; seeps; environmental monitoring; soil gas; geological survey
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MDPI and ACS Style

Mainson, M.; Heath, C.; Pejcic, B.; Frery, E. Sensing Hydrogen Seeps in the Subsurface for Natural Hydrogen Exploration. Appl. Sci. 2022, 12, 6383. https://doi.org/10.3390/app12136383

AMA Style

Mainson M, Heath C, Pejcic B, Frery E. Sensing Hydrogen Seeps in the Subsurface for Natural Hydrogen Exploration. Applied Sciences. 2022; 12(13):6383. https://doi.org/10.3390/app12136383

Chicago/Turabian Style

Mainson, Mederic, Charles Heath, Bobby Pejcic, and Emanuelle Frery. 2022. "Sensing Hydrogen Seeps in the Subsurface for Natural Hydrogen Exploration" Applied Sciences 12, no. 13: 6383. https://doi.org/10.3390/app12136383

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