S. Werle1, Ł. Ziółkowski1, C. Tomescu2, V. Rusu2, A. Milandru2, M. Pogrzeba3, J. Krzyżak3
1) Silesian University of Technology, Institute of Thermal Technology, Gliwice, PL; 2) Institute for Studies and Power Engineering, Bucharest, RO; 3) Institute for Ecology of Industrial Areas, Katowice, PL

PHYSICO-CHEMICAL PROPERTIES OF TARS AND ASHES OF THE GASIFICATION PROCESS OF THE HEAVY METAL CONTAMINATED MISCANTUS X GIGANTEUS AND SIDA HERMAFRODITA


Treatment of the soil by plants (phytoremediation), associated with the production of biomass for energy purposes, carries a number of significant problems with a practical and technical point of view. They concern mainly the way of the thermal conversion of biomass to energy production in an efficient and environmentally safe way. One way may be gasification. This process involves the conversion of organic matter into a combustible gas mixture by partial oxidation at high temperature under the influence of gasifying agent (air, oxygen, steam, or mixtures of these components). Gasification aim is to obtain a combustible gas. Unfortunately, the formation of gas also accompanied by the formation of solid and liquid waste products. The paper presents the results of basic physico-chemical properties of solid (ash) and liquid (tar) waste products of the gasification process of the heavy metal contaminated energy crops. The gasification process has carried out in a laboratory fixed bed reactor. Two types of energy crops: Miscanthus x giganteus and Sida hermaphrodita were used. The experimental plots were established on postindustrial site – former sewage sludge dewatering area (Leipzig site, Germany). The results show that the gasification process, promotes the migration of harmful substances such as heavy metals from fuel to the solid phase.

Keywords: Miscanthus x giganteus, Sida hermaphrodita, ash, tar, gasification, properties

Acknoledgments: The paper has been prepared within the frame of the FP7-People-2013-IAPP (GA No610797) Phyto2Energy Project