Open AccessVolatiles combustion in fluidized beds. Final technical report, 4 September 1992--4 June 1995
Author(s) -
R.A. Pendergrass,
Carolyn Raffensperger,
Robert P. Hesketh
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/218865
Subject(s) - freeboard , fluidization , fluidized bed , combustion , particulates , fluidized bed combustion , chemical looping combustion , bubble , particle (ecology) , phase (matter) , waste management , work (physics) , materials science , environmental science , chemical engineering , chemistry , mechanics , thermodynamics , geology , engineering , organic chemistry , physics , oceanography
The goal of this project is to investigate the conditions in which volatiles will burn within both the dense and freeboard regions of fluidized beds. Experiments using a fluidized bed operated at incipient fluidization are being conducted to characterize the effect of particle surface area, initial fuel concentration, and particle type on the inhibition of volatiles within a fluidized bed. A review of the work conducted under this grant is presented in this Final Technical Report. Both experimental and theoretical work have been conducted to examine the inhibition of the combustion by the fluidized bed material, sand. It has been shown that particulate phase at incipient fluidization inhibits the combustion of propane by free radical destruction at the surface of sand particles within the particulate phase. The implications of these findings is that at bed temperatures lower than the critical temperatures, gas combustion can only occur in the bubble phase or at the top surface of a bubbling fluidized bed. In modeling fluidized bed combustion this inhibition by the particulate phase should be included