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International Journal of Energy for a Clean Environment
SJR: 0.195 SNIP: 0.435 CiteScore™: 0.74

ISSN Print: 2150-3621
ISSN Online: 2150-363X

International Journal of Energy for a Clean Environment

Formerly Known as Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.v9.i1-3.70
pages 91-101

NOVEL CO2 CONTROL METHOD BY MEANS OF CO2 CHEMICAL LOOPING

C. Salvador
CANMET Energy Technology Centre, Natural Resources of Canada, Ottawa, ON, Canada K1A 1M1
D. Lu
CANMET Energy Technology Centre, Natural Resources of Canada, Ottawa, ON, Canada K1A 1M1
E. J. Anthony
CANMET Energy Technology Centre, Natural Resources of Canada, Ottawa, ON, Canada K1A 1M1
J. C. Abanades
Department of Energy and Environment, Instituto de Carboquimica, 50015 Zaragoza, Spain

ABSTRACT

Experiments were carried out in a fluidized bed, where the influence of calcination-carbonation cycling on the maximum CO2 carrying capacity could be studied. The effect of NaCO3 and NaCl additives on the maximum CO2 carrying capacity was also assessed. The fluidizing bed used in these experiments is 0.1 m in diameter and could be operated in either bubbling or circulating mode. A fluidization velocity of approximately 1 m/s and CO2 concentration of 15% by volume in air was used. All experiments were performed at atmospheric pressure, and the limestone particle size was maintained between 650 μm and 1675 μm. Limestone was calcined at 850°C, and the lime was carbonated at 700°C. The CO2 carrying capacity was observed to decay exponentially with each cycle, eventually settling at approximately 20%, varying slightly with the limestone type. The addition of NaCO3 and NaCl had a detrimental effect on the capacity of lime for CO2. A series of thermogravimetric experiments were also performed under similar conditions in an effort to verify the fluid bed work.