Zero emissions hydrogen
Hydrogen production
Our green hydrogen is produced using those photosynthesis chemistry principles, efficiently combining low impact renewable power, regenerative landfill materials, and recycling captured carbon to provide ultra low emissions hydrogen.
The landfill material, transformed to a valuable resource, is sourced locally reducing the emissions associated with transporting the hydrogen long distances. Hydrogen produced locally at integrated circular economy Resource, Energy, Chemical Hubs (REC Hubs) nearby to where it is to be used.
This green hydrogen production by HPAG materially limits the impact on water and land use as compared to alternative electrolysis hydrogen technologies.
Grading hydrogen
To date hydrogen has been classified by a colour intended to represent the energy source utilised to produce the hydrogen. This colour classification does not provide any indication of the carbon intensity of the hydrogen through its production on site (or “well”), conditioning or transportation to its’ points of use.
The International Energy Agency recently circulated a report advocating that hydrogen be classified based on its carbon intensity across its value chain, “well to gate” or “well to point” of use and assigned a grade from A to I, similar to the grading of diamonds. Hydrogen certificates of origin, or authenticity, are also intended to be incorporated in hydrogen passports.
Illustratively, the analysis completed of ZEROS hydrogen notionally assigns it a Grade A rating (subject to final IEA guidelines). That Grade A ratings arises from Sub.Zero hydrogen’s carbon intensity from production, conditioning and transport as being negative 7.8 kg CO2e per kg hydrogen, well to point.
Transporting hydrogen
Methanol, with characteristics similar to petrol/diesel, is substantially more energy dense at 140kg H2-eq / m3 when compared with compressed hydrogen at 350 bar at 26 kg H2-eq / m3.
Methanol is significantly easier to handle and simpler to transfer.
Ammonia, like methanol, offers specific advantages over transfer of gaseous hydrogen.
For ease of transport, reducing transport costs, safety considerations and minimising the carbon intensity of the Grade A hydrogen used, our preference is methanol as the hydrogen carrier, over ammonia.
Hydrogen to X
Hydrogen represents one of the cleanest most versatile future facing energy sources. Hydrogen’s versatility of use has engendered a range of uses as a gas, fuel and in power generation. This wide range of uses enables a range of energy end users to lower its carbon intensity in a framework referred to as “Hydrogen to X”, or Hydrogen to Anything.
In addition to hydrogen, HPAG producing biogenic carbon dioxide that further extends the benefits to energy end uses. The hydrogen is able to combined to produce emethanol and ammonia that further extends the variety of uses of hydrogen.
In Sub.Zero case, the concurrent availability of hydrogen and biogenic carbon dioxide enables the hydrogen produced to be transported and distributed locally maintaining an ultra low carbon intensity for the hydrogen used.