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

Volume

1

fYear

2009

fDate

16-18 Oct. 2009

Firstpage

715

Lastpage

718

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy and Environment Technology, 2009. ICEET '09. International Conference on

Conference_Location

Guilin, Guangxi

Print_ISBN

978-0-7695-3819-8

Type

conf

DOI

10.1109/ICEET.2009.180

Filename

5363623