gray hydrogen

American  

[grey hahy-druh-juhn] / ˈgreɪ ˈhaɪ drə dʒən /

Or grey hydrogen

noun

1. hydrogen that is produced by heating a hydrocarbon, especially natural gas, with steam, resulting in the release of carbon dioxide into the atmosphere.

---

Etymology

Origin of gray hydrogen

First recorded in 2015–20

Example Sentences

Gray hydrogen is produced from natural gas, and carbon dioxide is released in the process.

From Barron's

The dirty way is called gray hydrogen.

From Los Angeles Times

Eventually, they’ll have to compete with gray hydrogen on costs, or government subsidies will need to continue forever.

From Los Angeles Times

If fossil fuels are used, the process results in greenhouse gas emissions, and the result is called gray hydrogen.

From New York Times

Although green hydrogen costs about $5 per kilogram to produce — more than twice as much as gray hydrogen — the U.S.

From New York Times