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Mercury release and speciation in chemical looping combustion of coal

AutorMendiara, Teresa; Izquierdo Pantoja, María Teresa ; Abad Secades, Alberto ; Gayán Sanz, Pilar ; García Labiano, Francisco ; Diego Poza, Luis F. de ; Adánez Elorza, Juan
Palabras claveChemical looping
Coal
Bauxite waste
Mercury
Emissions
Fecha de publicaciónmar-2014
EditorAmerican Chemical Society
CitaciónEnergy and Fuels 28(4): 2786-2794 (2014)
ResumenIn the in situ Gasification Chemical Looping Combustion of coal (iG-CLC), the fuel is gasified in situ in the fuel reactor and gasification products are converted to CO2 and H2O by reaction with the oxygen carrier. This work is the first study on mercury release in Chemical Looping Combustion of coal. The fraction of the mercury in coal vaporized in the fuel reactor depended mainly on the fuel reactor temperature and the coal type. In the fuel reactor, mercury was mainly emitted as Hg0 in the gas phase and the amount increased with the temperature. In the air reactor, mercury was mostly emitted as Hg2+. In a real CLC system, mercury emissions to the atmosphere will decrease compared to conventional combustion as only mercury released in the air reactor will reach the atmosphere. However, measures should be taken to reduce Hg0 in the CO2 stream before the purification and compression steps in order to avoid operational problems.
Versión del editorhttp://dx.doi.org/10.1021/ef402377m
URIhttp://hdl.handle.net/10261/140121
DOI10.1021/ef402377m
ISSN1520-5029
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