Title :
Investigation on the Carbonation of CaO in Oxy-Fuel Fired Circulating Fluidized Bed
Author :
Wang, Chunbo ; Lu, Guang ; Song, Chunchang ; Hou, Weijun
Author_Institution :
Sch. of Energy & Power Eng., North China Electr. Power Univ., Baoding, China
Abstract :
The carbonation of CaO calcined from a chemical pure CaCO3 in oxy-fuel combustion condition was investigated in a thermo gravimetric analyzer. The influence of temperature and CO2 concentrations on the carbonation of CaO were investigated. It was found that temperature is very important for CaO carbonation reaction. At the range of tested temperatures, higher temperature can accelerate the carbonation of CaO and increase the conversion ratio. It could be concluded that ash will easier to deposit on the high temperature heater zone. It is also found that, CO2 concentration can accelerate the chemical reaction, but the influence is not obvious like temperature. Also, a CaO calcined from a industry limestone was selected for testing further and the similar carbonation tendency happened. The activation energy of carbonation of calcined product of chemical pure CaCO3 was calculated.
Keywords :
chemical reactions; coal; combustion; flue gases; fluidised beds; heating; thermal analysis; thermal power stations; CO2; CaCO3; CaO; activation energy; carbonation tendency; chemical reaction; high temperature heater zone; industry limestone; oxy-fuel combustion condition; oxy-fuel fired circulating fluidized bed; thermogravimetric analyzer; Ash; Calcination; Chemical analysis; Chemical technology; Combustion; Flue gases; Fluidization; Temperature control; Temperature distribution; Testing;
Conference_Titel :
Energy and Environment Technology, 2009. ICEET '09. International Conference on
Conference_Location :
Guilin, Guangxi
Print_ISBN :
978-0-7695-3819-8
DOI :
10.1109/ICEET.2009.180
