Beneath the massive dunes of Texas, there is more than barren sun-baked land. Far below the surface, experts are strategizing what could be one of the most audacious energy endeavors in recent memory, a Texas hydrogen mining operation that could generate hundreds of thousands of tons of green hydrogen annually, which would be stored in enormous underground salt caverns beneath what has been described as a “sea of sand.”
A closer look at the Lone Star State’s hydrogen city
Green Hydrogen International (GHI) leads this project and previously announced intentions to develop a significant green-hydrogen hub referred to as Hydrogen City and situated within Duval County, Texas, and around the Piedras Pintas Salt Dome.
GHI anticipates developing a 2.2 GW electrolyzer in its first phase, which will be powered by 3.75 GW of solar and wind energy, along with additional renewable energy sourced from the Texas grid when it is less expensive.
Through electrolysis, or splitting water into hydrogen and oxygen, the project hopes to produce about 280,000 tonnes of green hydrogen each year. This hydrogen will not simply be lost; it will be stored underground in salt caverns. GHI intends to carve out more than 50 caverns within the salt dome, potentially offering storage capacity similar to 6 TWh of energy.
Why Texas is the perfect “mine” for hydrogen
What is this Texas hydrogen extraction project doing right here under sand and salt? The answer is Texas’s advantages. First, the Piedras Pintas Salt Dome presents a natural underground cavity that is sealed tight, making it suitable for safely storing hydrogen long-term. Secondly, Texas has vast wind and solar resources, and that can fuel the enormous electrolyzer plant sitting above where the hydrogen is stored.
Finally, the location is strategically located near extensive infrastructure: pipelines can carry the hydrogen to Corpus Christi or Brownsville for conversion to green ammonia, rocket fuel, or even power. Brian Maxwell, CEO of GHI, described the project as “massive, world‑class,” believing it could position Texas at the forefront of the global hydrogen future, leading to the massive power plant invention set to power all of Europe.
Exploring how this project affects both humans and nature
From a human perspective, the local communities in Duval County may experience effects related to having the underground “hydrogen vault.” Building dozens of salt caverns and managing a facility of this size are not simple matters. Employees, engineers, and regulatory enforcers will need to be sure everything is safe and perform appropriately.
Water is one of the biggest challenges to manage in the environment. GHI needs very pure water for electrolysis to create green hydrogen. Some researchers are cautioning that scaling up could put pressure on local water supplies, especially if the location is already dealing with water stress.
How Texas hydrogen could stabilize energy and reach the world
On the bright side, if the project is successful, it could serve as a massive battery for clean energy. The hydrogen that is stored could level out the dips in solar and wind power. When it is not sunny or the wind dies, hydrogen could be taken out of storage and used.
There is also a global storyline: some of the hydrogen produced in Texas could be made into green ammonia for export. GHI even has a partnership with INPEX, a Japanese energy company, to evaluate this option.
Through GHI’s Hydrogen City, Texas has the potential to grow into a green hydrogen hub producing roughly 280,000 tonnes of annual output to be stored in underground salt domes. Although there are challenges, including water utilization and engineering risks, this project may unceremoniously develop as one of the world’s largest clean energy storage sites directly under the state, just like the United States’ massive underwater spheres, redefining renewable energy.
