Synopsis
A New Zealand research initiative explores the modeling of underground hydrogen injection, storage, and extraction, focusing on a natural gas site in Taranaki. The study aims to address operational challenges and enhance hydrogen's viability for future energy solutions.Key Takeaways
- Modeling of hydrogen storage processes
- Significance of reservoir pressure management
- Challenges in contamination during extraction
- Potential for large-scale hydrogen storage
- Importance of timing in hydrogen injection
Wellington, Feb 4 (NationPress) A research initiative in New Zealand is exploring the modeling of the injection, storage, and extraction of 10,000 tonnes of underground hydrogen at a natural gas storage facility located in Taranaki on the North Island.
The models aim to replicate the intricate processes associated with hydrogen storage, according to PhD candidate Liu Jinjian from the University of Canterbury (UC).
"They assist us in forecasting potential outcomes, recognizing possible challenges, and formulating practical extraction solutions," stated Liu, who conducted this research under the guidance of UC Associate Professor David Dempsey.
Although the underground storage of natural gas is a standard procedure, it is inherently less complicated due to its presence in a natural setting. Applying the same method for hydrogen is relatively uncharted territory but may prove essential for New Zealand's hydrogen future, as highlighted by the study.
The research emphasizes vital operational aspects, including reservoir pressure management, reducing hydrogen loss, and preserving gas purity. Liu noted that the site's distinctive geology enables hydrogen to float in "cups" within the reservoir; however, excessive injection could lead to overflow.
Nonetheless, numerous complex factors must be addressed to make hydrogen feasible at any single location.
"A challenge already recognized is the risk of contamination during extraction, as hydrogen frequently combines with leftover natural gas or water. While this mixture poses complications for certain applications, it could remain applicable for power generation or specific chemical processes," Dempsey mentioned, as reported by Xinhua news agency.
Storing hydrogen on a large scale could serve as a buffer, akin to how reservoirs function for water, he added, noting the aim is to create a framework that can be implemented across various sites nationwide, enhancing storage efficiency and minimizing transportation hurdles.
"The process of injecting hydrogen underground necessitates precise timing and accuracy. When green hydrogen is generated—such as during periods of excess solar energy—it must be stored to fully capture its value later. Equally important is the ability to swiftly retrieve it during peak demand," Professor Dempsey remarked.
