Control system for an oxy-fuel combustion fluidized bed with flue gas recirculation

Investigation on the transformation behaviours of Fe-bearing minerals of coal in O2/CO2 combustion atmosphere containing H2O

“…Taken into consideration that the experiment was conducted at a relatively high temperature (1450 °C), we should keep in mind that the diffusion-limited reaction rate will be sensitive to experimental conditions. 16,18 The O 2 concentration of 30% and a low H 2 O level are favorable for the establishment of pulverized coal combustion in oxy-fuel combustion atmosphere. 33 On the one hand, water vapor replaces part of the dilute CO 2 gas, and O 2 diffusion is faster in H 2 O.…”

“…In addition, in O 2 /CO 2 atmosphere, the water vapor concentration in the furnace is as high as 18–30 vol%, 14,15 which is much higher (7–10%) than that during the conventional air combustion and even higher than 40% (ref. 16 and 17 ) of the relevant amount present in the wet cycle. The coal char will be gasified much easier in a higher water vapour content atmosphere.…”

NO Emissions from Anthracite Oxy-Firing in a Fluidized-Bed Combustor: Effect of the Temperature, Limestone, and O2

“…During the OF mode, fluidizing gas is supplied by a set of O 2 and CO 2 commercial bottles. A detailed description of the facility can be found elsewhere. ,− …”

Oxyfuel CFBC: status and anticipated development

“…An interesting observation was that the modeling analysis suggests that bubble diameters are 20–40% smaller under oxyfuel conditions in the dense bed. Gueda et al 39. have also modeled the control system for an oxyfuel fluidized bed with flue gas recycle, again using data from their 90 kWth bubbling bed facility, and identified the parameters to achieve a smooth change from non‐recycle to recycle conditions.…”