Co-Gasification of Biomass and Coal in a Pressurised Fluidised Bed Gasifier

Abstract

During a 3 year (1996-1998), multinational project, partly funded by the EU as part of their JOULE programme, experimental and theoretical research will be done on co-gasification of biomass and coal in a pressurised fluidised bed gasifier. Delft University of Technology will determine experimentally the influence of feedstock (mixing ratio, biomass type) and operating conditions (temperature) on the characteristics (carbon conversion, fuel gas quality, dynamic behaviour) of the gasifier. Pelletised straw and Miscanthus wilt be used as biomass feedstock. The installation used to conduct these experiments has a maximum thermal capacity of 1.5 MWth and will operate at pressures up to 10 bar and temperatures of 900 degreesC. A 2 m high bed zone with a diameter of 0.4 m is followed by an adiabatic freeboard approximately 4 m high with a diameter of 0.5 m. A description will be given of the objectives of the project, the test rig to be used, the time schedule of the project and results obtained during the first part of the project will be presented and analysed.