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The IEA provides support for international collaboration on energy technology R&D, deployment and information dissemination. These groups function within a framework created by the IEA - the International Framework for International Energy Technology Collaboration. The views, findings and publications of these international groups (formally called Implementing Agreements) do not necessarily represent the views or policies of the IEA Secretariat or of all its individual member countries. OECD Member countries, autonomous OECD non-member countries, intergovernmental organisations, non-governmental organisations and private sector entities may participate. For more information, see our Technology Agreements page.

Fluidized Bed Conversion

The Implementing Agreement for Cooperation in the Field of Fluidized Bed Conversion of Fuels Applied to Clean Energy Production provides a framework for international collaboration on energy technology development and deployment.

Fluidized beds offer several advantages over pulverised fuel combustion, notably low NOx emission, in-process capture of SO2 and the ability to burn a wide range of low-grade and potentially difficult fuels (including waste and biomass), as well as mixed fuels. The "conversion" (combustion or gasification) of solid fuels for production of heat and/or electricity can be made by various fluidized bed techniques working at atmospheric pressure or under pressure, usually: "bubbling" and "circulating" fluidized beds. Supercritical steam conditions can be used for fluidized bed boilers (atmospheric and pressurised) and efficiencies in the range of 45 per cent may be attained in the near future. In addition, the technology can be employed for incineration and existing units have been successfully used for the disposal of high level PCB contaminated wastes, oil remediation and the elimination of low calorific wastes. The technology is also used in the metallurgical industry among others.

The Implementing Agreement on Fluidized Bed Conversion aims to bring together experts wishing to work on common problems. The main activity is technical exchanges during meetings and workshops. Participants are carrying out research on operational issues in support of local commercial fluidized bed conversion activities and sharing the results. Mathematical modelling has been a major activity in the past and a "1D" model for atmospheric fluidized bed combustion of coal has been developed and the exchanges in "3D" modelling of gas/solid flows as been very fruitful in permitting the development of knowledge of local solid concentration and heat transfer. In addition, efforts are undertaken in the field of: - solids attrition and fragmentation. - NOx and N2O formation and reduction. - sorbent reactivity and sulphur capture mechanisms. - bed sintering/agglomeration problems. - ash utilisation

The Agreement has published a series of compilations of outstanding papers on R&D activities in fluidized bed conversion and a guide book for the use of the "1D" CFB combustion model.

 


Signatories : Austria | Canada | China | Czech Republic | Finland | France | Greece | Hungary | Italy | Japan | Korea, Republic of | Poland | Portugal | Russian Federation | Spain | Sweden | United Kingdom | Shaw Consultants International Inc. |
   
For more information: http://www.iea-fbc.org

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