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International Journal of Energy for a Clean Environment

Publicou 8 edições por ano

ISSN Imprimir: 2150-3621

ISSN On-line: 2150-363X

SJR: 0.597 SNIP: 1.456 CiteScore™:: 3.7 H-Index: 18

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NOVEL CO2 CONTROL METHOD BY MEANS OF CO2 CHEMICAL LOOPING

Volume 9, Edição 1-3, 2008, pp. 91-101
DOI: 10.1615/InterJEnerCleanEnv.v9.i1-3.70
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RESUMO

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.

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