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Development of a Quality assurance system for Refuse Derived Fuels (RDF) and Biofuels

Industrial and agricultural production as well as private consumption of goods generates energy-rich residues and waste streams. These could be used as solid Refuse Derived Fuels in incineration plants under certain conditions with the aim of energy recovery. Such use of these fuels requires the determination of relevant parameters, e.g. the heating value or chlorine and sulfur content, to allow for a participation in the fuel trade and for utilization in a firing process. Present methods for the energetic characterization of RDFs are time-consuming and expensive. Thus, providers and consumers of RDF are interested in the application of optimized methods that determine the fuel quality in a reliable, fast and inexpensive way.

At the Chair of Solid Waste Management research activities are carried out aiming at the optimized heating value determination of RDFs within the scope of a ZIM-project (ZIM, http://www.zim-bmwi.de/ [1]) funded by the Federal Ministry of Economics and Technology (BMWi, refer to http://www.zim-bmwi.de/ [2]). The targeted process is based on the automated drying and combustion of a relatively big RDF sample. One focus of the work is the verification of empirical heating value functions on the basis of the elementary or flue gas composition, respectively. The results of the investigation will contribute to the development of a fast test system for the determination of the chlorine, ash and water content and the heating value of RDFs. In particular is investigated the influence of the hydrogen and nitrogen content of the tested fuels on the heating value determination that has been implemented into the fast test system.

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