Studies of carbonaceous cenospheres from fluidised-bed combustors
van Duin, P.J.
Hoofdgroep Maatschappelijke Technologie Centraal Laboratorium TNO
FIy ash from fluidised bed combustion of bituminous coals contains carbonaceous cenospheres of several forms including thick-walled opaque, transparent with a skeletal structure and 'balloons' without skeletons. The influence on cenosphere formation of particle size, temperature, heating rate, petrographic composition, etc. is reviewed. The probability of cenospheres surviving beyond the combustion zone under typical FBC conditions is estimated. Particles from experimental and industrial scale combustors were examined. Differences in chemical composition within single cenospheres were demonstrated and concentrations of major-, trace-elements and PAHs were measured. The possible significance of cenospheres in the environment is discussed.
To reference this document use:
Science of the Total Environment, 36, 239-246