Drying Characteristics of Particles using Thermogravimetric Analyzer

Yeong-Sung Park; Hyun Nam Shin; Dong Hyun Lee; Duk Joon Kim; Ji-Heung Kim; Young Kwan Lee; Sang Jun Sim; Kyong-Bin Choi

Korean Journal of Chemical Engineering, Vol.20, No.6, 1170-1175, November, 2003

Yeong-Sung Park, Hyun Nam Shin, Dong Hyun Lee^{1, †}, Duk Joon Kim¹, Ji-Heung Kim¹, Young Kwan Lee¹, Sang Jun Sim¹, and Kyong-Bin Choi²

Department of Environment Engineering, Daejeon University, Daejeon 300-716, Korea
¹Department of Chemical Engineering, SungKyunKwan University, Suwon 440-746, Korea
²Industry Furnace Research Team, KIER, Daejeon 305-343, Korea

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The drying characteristics (critical moisture content, equilibrium moisture content, constant drying rate and effective diffusivity) of various particles (gypsum, millet, polyvinyl chloride and silica gel) using a thermogravimetric analyzer were measured. The experiments were performed in the gas temperature range of 40 to 100 ℃ under isothermal conditions. The drying rate curve was mainly dependent on the moisture content, particle size, gas temperature and the internal structure of the solid particles. The equilibrium moisture content of solid particles decreased with increasing gas temperature, while the critical moisture content and the effective dispersion coefficient increased with increasing gas temperature. The effective diffusion coefficients of both PVC and gypsum particles were not able to be determined by Fick’s law since the experimental data were not well matched with the model predicted values, which consisted of the drying time in the falling-rate drying period.

Keywords:Drying Characteristics;TGA;Gypsum;PVC;Millet;Silica Gel

[References]

Ashworth JC, Carter JW, "Examination of Drying Behaviour of Silica-Gel Granules by Continuous Weighing in an Airstream," Dyring 1980, Vol. 1, Mujumdar, A.S., Ed., Hemisphere Publishing Corp., London (1980)
Amaldos J, Kozanoglu B, Casal J, "Vacuum Fluidization: Application to Drying," Fluidization, IX, Fan, L.S. and Knowlton, T.M., Eds., New York, Engineering Foundation (1998)
Bird RB, Stewart WE, Lightfoot EN, "Transport Phenomena," John Wiley, New York (2002)
Choi KB, Park SI, Park YS, Sung SW, Lee DH, Korean J. Chem. Eng., 19(6), 1106 (2002)
Crank J, "The Mathematics of Diffusion," Oxford University Press, Oxford (1967)
Davidson JF, Thorpe RB, Al-Mansoori O, Kwong H, Peck M, Williamson R, Chem. Eng. Sci., 56(21-22), 6089 (2001)
Kannan CS, Rao SS, Varma YB, Ind. Eng. Chem. Res., 33(2), 363 (1994)
Kannan CS, Thomas PP, Varma YB, Ind. Eng. Chem. Res., 34(9), 3068 (1995)
Keey RB, "Introduction to Drying Operations," Pergamon Press, Oxford (1978)
Kunii D, Levenspiel O, "Fluidization Engineering," Butterworth-Heinemann Publication, Boston (1991)
Lee DH, Kim SD, Chem. Eng. Technol., 16, 263 (1993)
Lee DH, Kim SD, Chem. Eng. Technol., 22(5), 443 (1999)
Luikov AV, "Drying Technology," Energia, Moscow (1968)
Moyers CG, King CJ, "Drying-Relating Principles to Design," AIChE Continuing Education Series (1988)
Mujumdar AS, Davahastin S, "Applications for Fluidized Bed Drying," Handbook of Fluidization and Fluid-Particle Systems, Chap. 18, Eds. W.C. Yang, Marcel Dekker Inc., New York (2003)
Reay D, Baker CG, "Drying," Fluidization, Davidson, J.F., Clift, R. and Harrison, D., Eds., Academic Press (1985)
Strumillo C, Kudra T, "Drying: Principles, Applications and Design," Gordon and Breach Science Publishers, New York (1986)
Van Brakel J, Heertjes PM, Int. J. Heat Mass Transf., 17, 1093 (1974)
Zahed AH, Zhu JX, Grace JR, Drying Technol., 13, 1 (1995)

[Referenced By]

[Related Articles]

[1] Ashworth JC, Carter JW, "Examination of Drying Behaviour of Silica-Gel Granules by Continuous Weighing in an Airstream," Dyring 1980, Vol. 1, Mujumdar, A.S., Ed., Hemisphere Publishing Corp., London (1980)

[2] Amaldos J, Kozanoglu B, Casal J, "Vacuum Fluidization: Application to Drying," Fluidization, IX, Fan, L.S. and Knowlton, T.M., Eds., New York, Engineering Foundation (1998)

[3] Bird RB, Stewart WE, Lightfoot EN, "Transport Phenomena," John Wiley, New York (2002)

[4] Choi KB, Park SI, Park YS, Sung SW, Lee DH, Korean J. Chem. Eng., 19(6), 1106 (2002)

[5] Crank J, "The Mathematics of Diffusion," Oxford University Press, Oxford (1967)

[6] Davidson JF, Thorpe RB, Al-Mansoori O, Kwong H, Peck M, Williamson R, Chem. Eng. Sci., 56(21-22), 6089 (2001)

[7] Kannan CS, Rao SS, Varma YB, Ind. Eng. Chem. Res., 33(2), 363 (1994)

[8] Kannan CS, Thomas PP, Varma YB, Ind. Eng. Chem. Res., 34(9), 3068 (1995)

[9] Keey RB, "Introduction to Drying Operations," Pergamon Press, Oxford (1978)

[10] Kunii D, Levenspiel O, "Fluidization Engineering," Butterworth-Heinemann Publication, Boston (1991)

[11] Lee DH, Kim SD, Chem. Eng. Technol., 16, 263 (1993)

[12] Lee DH, Kim SD, Chem. Eng. Technol., 22(5), 443 (1999)

[13] Luikov AV, "Drying Technology," Energia, Moscow (1968)

[14] Moyers CG, King CJ, "Drying-Relating Principles to Design," AIChE Continuing Education Series (1988)

[15] Mujumdar AS, Davahastin S, "Applications for Fluidized Bed Drying," Handbook of Fluidization and Fluid-Particle Systems, Chap. 18, Eds. W.C. Yang, Marcel Dekker Inc., New York (2003)

[16] Reay D, Baker CG, "Drying," Fluidization, Davidson, J.F., Clift, R. and Harrison, D., Eds., Academic Press (1985)

[17] Strumillo C, Kudra T, "Drying: Principles, Applications and Design," Gordon and Breach Science Publishers, New York (1986)

[18] Van Brakel J, Heertjes PM, Int. J. Heat Mass Transf., 17, 1093 (1974)

[19] Zahed AH, Zhu JX, Grace JR, Drying Technol., 13, 1 (1995)