International Journal of Environmental Science and Development

Abstract—Gasification of biomass and coal is an attractive technology for combined heat and power production, as well as for synthesis processes such as the production of liquid and gaseous biofuels. The allothermal steam blown gasification process yields a high calorific product gas, practically free of nitrogen. Originally, the system was designed for biogeneous fuels and residues but it can also handle a large number of other fuels such as several types of coal. To demonstrate the influence on the system performance of hard coal as an example of a solid fossil fuel a fuel blend of wood pellets and hard coal was fed into the DFB gasifier. The fuel blend ratio was 20 % coal in terms of energy. The DFB pilot plant was operated at a fuel power of 78 kW and a steam to fuel ratio of 1.0 kg/kgdb during the investigations. The system was operated at gasification temperatures between 830 and 870 °C. This paper points out the influence of the temperature on the system in terms of product performance, syngas quality as well as process efficiency.

Index Terms—Coal, co-gasification, wood, biomass.

S. Kern, C. Pfeifer and H. Hofbauer are with the Institute of Chemical Engineering at Vienna University of Technology, Getreidemarkt 9/166, 1060 Vienna, Austria (e-mail: stefan.kern@tuwien.ac.at).

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Cite: Stefan Kern, Christoph Pfeifer, and Hermann Hofbauer, "Synergetic Utilization of Biomass and Fossil Fuels: Influence of Temperature in Dual Fluidized Bed Steam Co-gasification of Coal and Wood," International Journal of Environmental Science and Development vol. 3, no. 3, pp. 294-299, 2012.