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Understanding Fluidised Bed Combustion

AUTHOR: Zhangfa Wu
DATE: October 2003

Fluidised bed combustion differs from conventional pulverised coal combustion. It uses a continuous stream of air to create turbulence in a mixed bed of fuel, inert material and coarse fuel ash particles. Combustion occurs at lower temperatures typically between 800°C and 900°C. This report reviews the fundamental aspects of the technology. It provides an up-to-date understanding of the mechanisms and chemical reactions involved in fluidised bed combustion and how process parameters and/or fuel quality may affect fluidisation, combustion and pollutant formation.