It's burned as fuel in a gas turbine to generate electricity. The process is very similar to burning natural gas in turbines, but some equipment adjustments have to be made when running on hydrogen. The Delta project is going to blend the hydrogen with natural gas when it's burned starting with 30% hydrogen and gradually step up toward 100% hydrogen.

Siemens currently has turbines that can burn up to 75% hydrogen and is targeting 100% hydrogen by 2030:

https://www.siemens-energy.com/global/en/priorities/future-t...

General Electric has a variety of gas turbines, accepting 50% to 100% hydrogen in the fuel blend:

https://www.ge.com/gas-power/future-of-energy/hydrogen-fuele...