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Underground reforming with CCUS


Technology Description

In underground reforming, air or oxygen is pumped into an underground gas reservoir then ignited to set fire to the hydrocarbons. Once the fire reaches 500 °C, the water vapour or injected steam reacts with the hydrocarbons producing syngas. Then, more water is added to the syngas to increase hydrogen production and shift the CO in the syngas to CO2.

Relevance for Net Zero

Underground reforming can decrease significantly the CO2 emissions associated with hydrogen production and could play an important role in net zero pathways, particularly for the creation of new production capacities, as long as the CO2 is permamently stored and upstream emissions of the fuel supply are minimised or completely avoided. However, its deployment is expeted in the mediunm- to long term due to its low TRL

Key Countries


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