# Hydrogen: Relationships

Source page: https://www.materialinsights.org/chemicals/hydrogen/links/

Every element and industry that Hydrogen is linked to, and how. Each pair has its own card explaining the relationships between the two.

- [Chlorine](https://www.materialinsights.org/links/chlorine-and-hydrogen/): Every tonne of chlorine made by brine electrolysis brings about 30 kg of hydrogen, so chlor-alkali plants are a small but steady source of electrolytic hydrogen whose volume follows chlorine demand. Plants burn it as fuel, combine it with chlorine to make hydrochloric acid, turn it into hydrogen peroxide, or sell it. *(researched)*
- [Natural gas](https://www.materialinsights.org/links/hydrogen-and-natural-gas/): Steam reforming of natural gas makes most of the world's hydrogen, using 290 bcm of gas in 2024, so gas sets grey hydrogen's cost; carbon capture and electrolysis are the routes away from unabated gas, both still dearer. *(researched)*
- [Refining and reforming](https://www.materialinsights.org/links/hydrogen-and-refining-and-reforming/): Refineries are among the largest hydrogen users, needing it to remove sulphur from fuels and upgrade heavy oil; they make some in their reformers and the rest from gas, and they are now the first big buyers of green hydrogen. *(researched)*
- [Water](https://www.materialinsights.org/links/hydrogen-and-water/): Electrolysis makes hydrogen by splitting water, using about 9 litres of purified water per kilogram before cooling needs. The volumes are small next to farming, but many of the sunniest and windiest sites planned for green hydrogen, including in western India, are short of fresh water, so siting and water sourcing matter. *(researched)*
- [Aerospace and defence](https://www.materialinsights.org/links/aerospace-and-defence-and-hydrogen/): Aerospace and defence depends on hydrogen.
- [Ammonia](https://www.materialinsights.org/links/ammonia-and-hydrogen/): Their prices have moved together.
- [Building materials](https://www.materialinsights.org/links/building-materials-and-hydrogen/): Building materials depends on hydrogen.
- [Coking coal](https://www.materialinsights.org/links/coking-coal-and-hydrogen/): Their prices have moved together.
- [Diamonds](https://www.materialinsights.org/links/diamonds-and-hydrogen/): Their prices have moved together.
- [Electrolysers](https://www.materialinsights.org/links/electrolysers-and-hydrogen/): Electrolysers needs hydrogen.
- [Fatty alcohols](https://www.materialinsights.org/links/fatty-alcohols-and-hydrogen/): Their prices have moved together.
- [Food and beverage processing](https://www.materialinsights.org/links/food-and-beverage-processing-and-hydrogen/): Food and beverage processing depends on hydrogen.
- [Fuel cells](https://www.materialinsights.org/links/fuel-cells-and-hydrogen/): Fuel cells needs hydrogen.
- [Gas turbines and combined cycle](https://www.materialinsights.org/links/gas-turbines-and-combined-cycle-and-hydrogen/): Their prices have moved together.
- [Hydrogen and hydrogen carriers](https://www.materialinsights.org/links/hydrogen-and-hydrogen-and-hydrogen-carriers/): Hydrogen and hydrogen carriers needs hydrogen.
- [Hydrogen peroxide](https://www.materialinsights.org/links/hydrogen-and-hydrogen-peroxide/): Their prices have moved together.
- [Hydrogen storage](https://www.materialinsights.org/links/hydrogen-and-hydrogen-storage/): Hydrogen storage needs hydrogen.
- [Iron ore](https://www.materialinsights.org/links/hydrogen-and-iron-ore/): Their prices have moved together.
- [Methanol](https://www.materialinsights.org/links/hydrogen-and-methanol/): Their prices have moved together.
- [Power-to-X](https://www.materialinsights.org/links/hydrogen-and-power-to-x/): Power-to-X needs hydrogen.
- [Renewable diesel and SAF](https://www.materialinsights.org/links/hydrogen-and-renewable-diesel-and-saf/): Their prices have moved together.
- [Semiconductors](https://www.materialinsights.org/links/hydrogen-and-semiconductors/): Semiconductors depends on hydrogen.
- [Steel](https://www.materialinsights.org/links/hydrogen-and-steel/): Their prices have moved together.
- [Telecommunications](https://www.materialinsights.org/links/hydrogen-and-telecommunications/): Telecommunications depends on hydrogen.
- [Thermal coal](https://www.materialinsights.org/links/hydrogen-and-thermal-coal/): Thermal coal is a raw material for hydrogen.

## Other sections

- [Summary](https://www.materialinsights.org/chemicals/hydrogen/index.md)
- [Overview](https://www.materialinsights.org/chemicals/hydrogen/overview/index.md)
- [Correlation](https://www.materialinsights.org/chemicals/hydrogen/correlation/index.md)
- [Production route](https://www.materialinsights.org/chemicals/hydrogen/routes/index.md)
- [Production](https://www.materialinsights.org/chemicals/hydrogen/production/index.md)
- [Feedstocks](https://www.materialinsights.org/chemicals/hydrogen/feedstocks/index.md)
- [Cycles](https://www.materialinsights.org/chemicals/hydrogen/cycles/index.md)
- [Trading](https://www.materialinsights.org/chemicals/hydrogen/trading/index.md)
- [Movement](https://www.materialinsights.org/chemicals/hydrogen/movement/index.md)
- [Regulation](https://www.materialinsights.org/chemicals/hydrogen/regulation/index.md)
- [Characteristics](https://www.materialinsights.org/chemicals/hydrogen/characteristics/index.md)
- [Emissions](https://www.materialinsights.org/chemicals/hydrogen/emissions/index.md)