IEA HIA Task 25

IEA HIA Annex 25 - High Temperature Production of Hydrogen

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Operating Agent Francois Le Naour, CEA (

Term   Task 25 was approved in late 2007 with a three year term of operation.

Purpose and Objectives:  The purpose of Task 25 is to support production of massive quantities of zero-emission H2 through use of high temperature processes (> 500 C) coupled with nuclear and solar heat sources. The overarching objective is to share existing worldwide knowledge on high temperature processes (HTPs) and further to develop expertise in global assessment of the HTPs that can be integrated in Hydrogen Production Road Mapping. The specific objectives are:

  • To identify and classify HTPs and establish different and coherent criteria for each family of HTPs identified, based on a scientific/technological approach

  • To identify and classify the HTPs and establish different and coherent criteria for each family

  • To establish the state of the art and investigation of the existing knowledge, programs, projects on HTPs and other innovative ideas for massive production of hydrogen.

Background:  High temperatures often imply an increased potential for high efficiencies, but also involve large capital investments to reach maximum efficiency.  High temperature processes involve a decrease in ohmic resistance and use of heat rather than electricity.  In practical terms, there is a need to identify the most suitable temperature for the optimum between efficiency and technology constraints.   

Description:  Task 25 research will focus on three process families:  steam electrolysis; thermochemical cycles (including pure and hybrid thermochemical processes); and innovative direct water splitting.  Task 25 will have four subtasks, which are listed and described below:

Subtask A - Scientific, Technological Review and Analysis of Temperature Processes and the State of the Art (Subtask Leader Christian Sattler, DLR)

Development of summary sheets describing every process using the same evaluation method presentation format. This will include worldwide mapping and technical review of the high temperature process studies and development, database (relevant papers, books and websites).

Subtask B - Development of a Methodology Approach and Integration of HTPs

Subtask will define the main criteria for integration of HTPs into the hydrogen chain, including the interface and primary energy source.  It will define and apply a methodology and multi-criteria approach to assess and compare the different HTPs.  Subtask B will focus on proving tools designed to pilot the technological choices, making it possible to meet the increasing demand on the hydrogen energy vector. 

Subtask C - Establishment of Benchmarks, Recommendations for HTP R&D and Future Industrial Deployment

Subtask C will identify the most promising technologies and recommendations for R&D needs based on the Subtask A review.  It will develop studies and recommendations to meet the needs in large future facilities and/or demonstration programs required to facilitate accelerated introduction of HTPs.

Subtask D - Coordination and Links with Other International Organizations; Dissemination of Information (Subtask Leader and Operating Agent Gilles Rodriguez, CEA)

Subtask D will focus on developing and ensuring coherence between this task and other projects and groups.  It will also facilitate exchanges and utilization of experimental facilities.

Participants:  To be announced subsequent to the kickoff meeting.

The kickoff meeting for this task will be held in October, 2007 in Cologne, Germany.