That type is known as "grey" hydrogen. A cleaner version is "blue" hydrogen, for which the carbon emissions are captured and stored, or reused. The cleanest one of all is "green" hydrogen, which is generated by renewable energy sources without producing carbon emissions in the first place.
6 · Depending on production methods, hydrogen can be grey, blue or green – and sometimes even pink, yellow or turquoise – although naming conventions can vary across countries and over time.
Grey hydrogen can be produced inexpensively using coal or natural gas, but it has a significant carbon footprint. Most of the grey hydrogen produced today is made by a process called steam
Hydrogen fuel burns clean, so it has potential as a low-carbon energy source — depending on how it''s made. Today, most hydrogen is known as "gray"hydrogen. It''s derived from natural gas using an energy-intensive process that emits a lot of carbon dioxide.
Grey hydrogen is created from natural gas, or methane, using steam methane reformation but without capturing the greenhouse gases made in the process. Grey hydrogen is essentially the same as blue hydrogen,
Grey hydrogen. Grey hydrogen is hydrogen produced using fossil fuels such as natural gas or coal. Grey hydrogen accounts for roughly 95% of the hydrogen produced in the world today. [3] The two main production methods are steam methane reforming and
There are three main types of hydrogen discussed today. First, ''grey'' hydrogen. The vast majority of hydrogen in use — and there is plenty of it, mainly in industry — is made from natural gas.
Gray Hydrogen. Gray hydrogen, the most conventional form sourced from natural gas, is produced through steam methane reforming without carbon capture, resulting in direct CO 2 emissions. This method is cost-effective but contributes to carbon emissions, which poses environmental concerns.
Gray hydrogen is produced through steam methane reforming. The process is also called "natural gas reforming" or "steam reforming". It is one of the most popular hydrogen technologies, accounting for approximately 80 percent of hydrogen production in the United States, according to the 2021 Global Hydrogen Review .
After 2025, nearly all new hydrogen production coming online is expected to be clean hydrogen. This coincides with the start of the expected phaseout of grey hydrogen, driven by the growing cost competitiveness of clean hydrogen and commitments to decarbonize.