'At least 1% hydrogen' | Portuguese gas pipeline operator starts upgrading network to carry 10% green H2 blends
Adapted equipment will analyse the make-up of the mix ahead of new minimum blend rules
Hydrogen: hype, hope and the hard truths around its role in the energy transition
REN has started adapting 16 chromatographs — devices that measure the exact chemical makeup of the gas — across its 1,400km network, known as the National Gas System.
The chromatographs work by using an inert “carrier gas” to pass the mixture through the machine to analyse the quantities of hydrogen and gas.
The machines are typically used to assess the purity of methane, but will now also be used to measure the exact quantities of hydrogen in the mix.
In addition, the adapted chromatographs will allow REN’s scientists to reduce their use of relatively scarce helium as a carrier gas and use argon instead.
Green hydrogen will sell for no more than €127/MWh ($139/MWh) while biomethane auctions will be capped at €62/MWh.
It is not yet clear when the new rule will be enforced.
Portugal recently scrapped environmental permitting for green hydrogen projects, in a bid to bring more capacity on line as quickly as possible.