Nortegas concludes that green hydrogen blended with natural gas reduces greenhouse gas emissions and improves combustion processes in households.

The combustion produced in domestic boilers by blending natural gas with hydrogen is safe and less polluting, due to the significant reduction in combustion gas emissions when blending. This is the conclusion drawn from the combustion tests on conventional domestic boilers recently completed by Nortegas as part of its H2Sarea project, in which it is injecting a blend of 20% hydrogen and 80% natural gas into a replica of the company's gas distribution network.

Specifically, the tests show that a 20% blend of hydrogen with natural gas reduces carbon monoxide (CO) emissions by 54%, carbon dioxide (CO2) by 7% and nitrogen oxides (NOX) by 53%, approximately. This confirms a better combustion of natural gas when blended with hydrogen, which in turn improves the air quality in our cities.

The H2Sarea project has also shown that the hybrid gas obtained by blending natural gas and hydrogen behaves as a single natural gas in all respects, and that the hydrogen does not separate from the natural gas. This is supported by the leakage tests conducted as part of the project, as no leakage has been detected during the almost 12,000 hours of tests performed to date. It can therefore be concluded that the behaviour of the blend is just as safe as in the case of the natural gas that currently flows through the pipelines and is consumed in households.

Source: Nortegas