IEA Hydrogen Task 45: Renewable Hydrogen Production

Due to the increasing pressure to replace fossil fuels with alternatives, the demand for renewable hydrogen supplies is also increasing. In this project, the state of the art of various established and innovative production paths will be collected, processed and then made available to the public.

Short Description

The task "Production of renewable hydrogen" in the TCP Hydrogen aims to monitor and assess the development of the wide range of technologies for the production of renewable hydrogen. The plan is to provide clear and concise updates on the status of different routes to green hydrogen production, from water splitting (electrolysis, thermochemical, hybrid) to the conversion of biomass-derived feedstocks (biological, thermochemical). Indicators will be provided to assess processes at different levels of maturity or using different sources, so that policy makers and stakeholders can get an up-to-date picture of the status of renewable hydrogen production technologies. Making the different green hydrogen production options more visible is an explicit goal of the task.

The task is divided into five subtasks and a Task Force on General Analysis & Communication. The subtasks are:

  1. Electrolysis
  2. Photo(electro)chemical water splitting
  3. Thermochemical water splitting
  4. Thermochemical conversion of C Feedstocks
  5. Biological processes

For each of the five areas, a summary ("Technology Brief") of 4 pages each and a more detailed technical document will be prepared.

Each technology brief consists of a description of the technologies, details of the technology readiness levels (TRLs) and manufacturing readiness as well as selected key performance indicators (KPIs) and a cost analysis. The focus of the activities is on technologies that have reached at least TRL 3. A brief overview is provided for technologies below TRL 3. The resources required are also specified (focus on critical raw materials). The Technology Briefs also discuss the scenarios in which the technologies can be integrated particularly advantageously into an energy system based on renewable energy sources. Finally, important issues for research and development are highlighted.

These 4-page reports are supplemented by "Master Reports on the state of the art", which are 10 pages long (or more) and are aimed at a specialist audience and provide more detailed information.

The results are disseminated via various communication channels. These include webinars, workshops and articles on specialist platforms. This work will be coordinated by a Task Force on General Analysis & Communication (A&C-TF). The partners from the national consortium AEA, AEE INTEC and TU Vienna are involved in all areas with the exception of Subtask 3.


Australia, Germany, China, Denmark, France, Greece, Italy (Operating Agent), Canada, Korea, Netherlands, Norway, Austria, Sweden, Spain, USA

Contact Address

Project lead

Felix Bettin, MSc
Österreichische Energieagentur
A-1150 Wien, Mariahilfer Straße 136

Project partners

Dr. Bettina Muster-Slawitsch
AEE - Institut für Nachhaltige Technologien
A-8200 Gleisdorf, Feldgasse 19

Ao. Univ.Prof. Dr. Michael Harasek
Technische Universität Wien
Institute of Chemical, Environmental & Bioscience Engineering
Thermal Process Engineering - Computational Fluid Dynamics
A-1060 Wien, Getreidemarkt 9/166