Green Hydrogen Production

New net zero technologies currently in development
Contact an expert

Delivering new climate technologies  

Driven by a clear purpose to clean and decarbonise the air, CATAGEN are harnessing their knowledge and capability to deliver new climate technologies for generating green hydrogen and efuels.

Green Hydrogen is produced from 100% renewable energy and produces zero carbon emissions.

water and renewable energy in,
hydrogen and oxygen out

It’s viewed as a fuel to meet today’s energy demands for power generation, mobility, industry and heating to transition to a decarbonised world.


  • To power solid oxide fuel cells to provide electricity for electric vehicles and electronic devices
  • To power hydrogen fuel cell vehicles such as cars or buses
  • To achieve full transport decarbonisation when converted into other zero-carbon fuels for shipping and aviation
  • To power industry
  • To power homes via gas pipelines

Green hydrogen can be produced locally by any country with renewable energy resources providing energy security.

Energy efficient production of green hydrogen is a key challenge for the Hydrogen economy.  It’s currently expensive to produce at scale, to transport and to store however……

Green hydrogen could become a US$10 trillion addressable market by 2050 according to Goldman Sachs.  (Forbes)   


(in development – patent protected) 

CATAGEN are developing a Green Hydrogen solution based on its core competencies, skilled team and patented technologies. 

This project combines CATAGEN’s recirculating gas reactor technology to create a production machine for high-efficiency green hydrogen production. The process uses water as the net feedstock and renewable electricity enabling zero-carbon Green Hydrogen production.

There are no electrolysers used in this process; the proposed CATAGEN Green Hydrogen Generator uses a multi-stage thermochemical process in a recirculating reactor to split water with an energy cost of less than 55 kWh/kgH2. In addition, the proposed solution has an estimated CO2 saving of 2.8 kgCO2/kgH2 during production compared to electrolysis.

The output of the project will mean green hydrogen can be produced with reduced energy input, reduced operating costs and lower capital expenditure compared to conventional methods.

Further efficiencies are possible due to the high thermal inertia proposed with such a system, allowing maximum energy utilisation from fluctuating power supplies.

This means renewable energy can be better utilised for hydrogen production and the cost of production reduced. As experts in recirculating gas reactor technology CATAGEN is ideally placed to develop this technology taking it through to production.


(in development – patent protected) 


CATAGEN are developing a process for new liquid e-fuel production using its energy efficient patented OMEGA reactor. This is a new approach to developing a proprietary method to create an affordable hydrogen fuel carrier that uses the energy from a wind turbine. Hydrogen is difficult to transport so our e-fuel carrier makes it easier to transport and store.

The proposed CATAGEN System has the potential to address the issues around hydrogen storage and transport.  E-fuels provide a net-zero solution to replace fossil fuels.  CO2 is captured from the air and used as a feedstock with green hydrogen in the synthesis of e-fuel and is recycled into the air once used in application.  A totally renewable energy dense fuel with Net Zero CO2.

CATAGEN are presenting a potential solution based on the core competencies, skilled team and technologies developed as a successful Queen’s University Belfast spin out that works with the world’s leading automotive manufacturers.

The objective of this project is to determine the feasibility of developing new capabilities and technologies to combine  known recirculating gas reactor test technology to yield a production machine and process that can produce green syngas with a subsequent second stage reaction to a high density, easily transportable green E-Fuel (a long chain hydrocarbon).

This new process will utilise green hydrogen and CO2 sequestered from the air as feedstock, with the proposed new production reactor and process to be powered using renewable electricity resulting in a carbon net-zero, hydrogen-based, fuel which can be utilised to help decarbonise existing fleet and difficult sectors such as marine and aviation.

The calculated energy to generate 1kg of E-Gasoline using this method is 6.5kWh, which is comparable to the energy for compression of 1kg of H2 for high pressure storage, and 10% of the energy required to generate 1kg H2. The output of the project will mean E-Fuel can be produced at a renewable energy site alongside hydrogen production.



Green Hydrogen

CATAGEN receives 4 funding awards to propel Green Hydrogen and E-Fuels as decarbonisation routes for Net Zero

CATAGEN receives 4 funding awards to propel Green Hydrogen and E-Fuels as decarbonisation routes for Net Zero

Belfast based CATAGEN have successfully secured initial funding to produce green hydrogen and e-fuels from the UK’s Department for Business,...
Read More
CATAGEN May Newsletter

CATAGEN May Newsletter

Read More