Firstgas Group unveiled its plans to decarbonize New Zealand’s gas pipeline network by transitioning from natural gas to H2 as the country continues on the path to a zero-carbon future.

From 2030, hydrogen will be blended into the North Island’s natural gas network, with conversion to a 100% hydrogen grid by 2050, Firstgas Group said. This will be supported by biogas and bioLPG to reduce emissions for gas users. 

The transition timeline is informed by the Firstgas' Hydrogen Network Trial report, which received funding through the Provincial Develop Unit and projects future hydrogen supply-and-demand in New Zealand and assesses technical practicalities and regulatory factors. 

The conversion of networks to 100% hydrogen gas will begin from 2035. This allows time for appliances to be replaced with technology able to operate on pure hydrogen. Complete conversion of the gas network to 100% hydrogen is scheduled for 2050, Firstgas said.

The plan aims to meet the objectives of the Zero Carbon Act without gas users resorting to electrification or carbon offsets – or replacing their current gas equipment.

Stored green hydrogen will be converted back to electricity when required to meet demand during peak times or dry spells.

The Firstgas Hydrogen Network Trial report proposes that green hydrogen – produced from surplus renewable electricity – will replace fossil fuels where possible. The hydrogen will be produced by regionally-dispersed electrolysers and distributed by the existing local pipe networks that deliver natural gas to consumers, Firstgas said.