KINETIC EVALUATION OF CaO DISSOLUTION AIMING FLUE GAS DESULPHURIZATION

KINETIC EVALUATION OF CaO DISSOLUTION AIMING FLUE GAS DESULPHURIZATION

FRANCA, I. W. L.; LIMA, M. L. B.; FERNANDES, F. A. N.; NETO, M. B.; GONALVES, L. R. B.

Pôster:

Quicklime dissolution represents one of the most important steps in FlueGas Desulphurization (FGD) process. In the present work, the kinetic dissolution ofquicklime has been studied in a pH-Stat apparatus. Stirring presented no effect above1320 rpm, indicating a possible mas transfer limitation under this value. Even though, astemperature increases, the dissolution reaction rate increased (675 %), and the activationenergy was 25.52 kJ.mol-1. Kinetic analysis of the results indicates that the quicklimedissolution follows the shrinking core model and it is controlled by both mass transfer(under 1320 rpm) and reaction on surface steps.

Quicklime dissolution represents one of the most important steps in FlueGas Desulphurization (FGD) process. In the present work, the kinetic dissolution ofquicklime has been studied in a pH-Stat apparatus. Stirring presented no effect above1320 rpm, indicating a possible mas transfer limitation under this value. Even though, astemperature increases, the dissolution reaction rate increased (675 %), and the activationenergy was 25.52 kJ.mol-1. Kinetic analysis of the results indicates that the quicklimedissolution follows the shrinking core model and it is controlled by both mass transfer(under 1320 rpm) and reaction on surface steps.

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DOI: 10.5151/cobeq2018-PT.0634

Referências bibliográficas

• [1] Abali Y, Lu SKO, Kaymak J. Dissolution kinetics of calcinated manganese ore in acetic acid solutions. C B U J Sci 2007; 81–88. Altun N.E., 2014, Assessment of Marble Waste Utilization as an Alternative Sorbent to Limestone for SO2 Control, Fuel Process. Technol. 128, 461 -470. Koech, L., Everson, R., Neomagus, H., “Dissolution kinetics of sorbents and effect of additives in wet flue gas desulfurization,” Rev. Chem. Eng., vol. 30(6), pp. 553–565, 2014. Levenspiel, O. Chemical Reaction Engineering, second ed., New York, 1972. Siagi Z.O., MBARAWA M., 2009, Dissolution rate of South Australian calcium-based materials at constant pH, J. Hazard. Mater. 163, 678-682.

Como citar:

FRANCA, I. W. L.; LIMA, M. L. B.; FERNANDES, F. A. N.; NETO, M. B.; GONALVES, L. R. B.; "KINETIC EVALUATION OF CaO DISSOLUTION AIMING FLUE GAS DESULPHURIZATION", p-2399-2402. In: . São Paulo: Blucher, 2018.
ISSN 23591757, DOI 10.5151/cobeq2018-PT.0634