Green hydrogen as future fuel

We all see an extreme increase in attention for green hydrogen as future fuel. Around the world, companies are preparing their machines for large-scale but also decentralized electricity generation via hydrogen combustion in modern gas turbines. Quickly, they were able to fire up to around 30%vol H2 with only minor adjustments.

However,
1. 30 %Vol. just means 5% Mass when mixed with Methane! – almost nothing! Even 60%Vol. means just around 15%Mass!
2. At typical fuel-air ratios (e.g. Lambda 2.3) the turbulent flame speed starts to rapidly increase at around 35-40 %Vol.-H2, not before, and reaches its maximum already at around 70%Vol.-H2. This can cause flashbacks and immediately destroy the combustor.

The challenge is consequently not to burn hydrogen in generals, but to burn considerable fractions of 90 %Vol (50 %Mass) of green hydrogen at low emissions, without water/steam admixture, and to strictly fulfill safety, emission, pressure drop, and lifetime requirements inside the gas turbine!

If you want to find out more about the Micromix click here.