PYROLYSIS OF SCRAP TIRE RUBBERS:RELATIONSHIPS OF PROCESS VARIABLES WITH PYROLYSIS TIME

Kim S

Korean Journal of Chemical Engineering, Vol.13, No.6, 559-564, November, 1996

The functional relationships of industrially interesting variables such as pyrolysis temperature, heating rate, and sample size with pyrolysis time were explored to provide basic information on designing energy efficient processes. Pyrolysis kinetics of scrap tire rubbers tested in this study were investigated to formulate the functional relationships of pyrolysis temperature and heating rate. The pyrolysis time decreases exponentially with increasing pyrolysis temperature and heating rate, indicating high activation energies of pyrolysis reaction of the scrap tire rubbers tested in this study. The effect of heat transfer on the pyrolysis kinetics was evaluated by seeking the functional relationship between the sample size and pyrolysis time. The pyrolysis time increases linearly with increasing sample diameter. The slope of the straight line is proportional to the specific heat of the sample.

Keywords:Heating Rate;Pyrolysis Temperature;Pyrolysis Time;Sample Size;Scrap Tire Rubbers

[References]

Clark C, Meardon K, Russell D, "Burning Tires for Fuel and Tire Pyrolysis: Air Implications," EPA-450/3-91-024, U.S. Environmental Protection Agency (1991)
Dodds J, Domenico WF, Evans WF, Fish DR, Lasahn PL, Toth WJ, "Scrap Tires: A Resource and Technology Evanluation of Tire Pyrolysis and Other Selected Alternative Technologies," EGG-2241, U.S. Department of Energy (1983)
Doyle CD, J. Appl. Polym. Sci., 6(24), 639 (1962)
Eastman AL, "Scrap Tires: Alternatives and Markets in the United States," Rubber Division, Amer. Chem. Soc., Orlando, Florida (1993)
Kaminsky W, Sinn H, Hydrocarb. Process., 59(11), 187 (1990)
Kim S, "Pyrolysis of Scrap Tire Rubbers," Ph.D. Dissertation, Univ. Wisconsin-Madison (1995)
Kim S, Park JK, Chun H, J. Environ. Eng.-ASCE, 121(7), 507 (1995)
Kim SD, Park JK, Thermochim. Acta, 264, 137 (1995)
Kim S, Chun HD, Korean J. Chem. Eng., 12(4), 448 (1995)
Kim S, Park JK, Kim SD, "Pyrolysis Kinetics of Scrap Tire Rubbers, II: Heat Transfer Effects," Submitted for Publication in the ASCE J. Environ. Eng. (1995)
Kim S, Park JK, "Theoretical Determination of Energy Efficient Pyrolysis Process of Scrap Tire Rubbers," In Preparation to Submitted to the Environ. Sci. Technol. (1995)
Mirmiran S, Pakdel H, Roy C, J. Anal. Appl. Pyrolysis, 22, 205 (1992)
Ozawa T, J. Thermal. Anal., 2, 301 (1970)
Pakdel H, Roy C, Aubin H, Jean G, Coulombe S, Environ. Sci. Technol., 25, 1646 (1991)
Roy C, "Vacuum Pyrolysis of Scrap Tires," U.S. Patent, 4,740,270 (1988)
Roy C, Labrecque B, deCaumia B, Resour. Conserv. Recycling, 4, 203 (1990)
U.S. Environmental Protection Agency, "Markets for Scrap Tires," EPA/530-SW-90--074A (1991)
Williams PT, Besler S, Taylor DT, Fuel, 69, 1474 (1990)

[Referenced By]

[1] Clark C, Meardon K, Russell D, "Burning Tires for Fuel and Tire Pyrolysis: Air Implications," EPA-450/3-91-024, U.S. Environmental Protection Agency (1991)

[2] Dodds J, Domenico WF, Evans WF, Fish DR, Lasahn PL, Toth WJ, "Scrap Tires: A Resource and Technology Evanluation of Tire Pyrolysis and Other Selected Alternative Technologies," EGG-2241, U.S. Department of Energy (1983)

[3] Doyle CD, J. Appl. Polym. Sci., 6(24), 639 (1962)

[4] Eastman AL, "Scrap Tires: Alternatives and Markets in the United States," Rubber Division, Amer. Chem. Soc., Orlando, Florida (1993)

[5] Kaminsky W, Sinn H, Hydrocarb. Process., 59(11), 187 (1990)

[6] Kim S, "Pyrolysis of Scrap Tire Rubbers," Ph.D. Dissertation, Univ. Wisconsin-Madison (1995)

[7] Kim S, Park JK, Chun H, J. Environ. Eng.-ASCE, 121(7), 507 (1995)

[8] Kim SD, Park JK, Thermochim. Acta, 264, 137 (1995)

[9] Kim S, Chun HD, Korean J. Chem. Eng., 12(4), 448 (1995)

[10] Kim S, Park JK, Kim SD, "Pyrolysis Kinetics of Scrap Tire Rubbers, II: Heat Transfer Effects," Submitted for Publication in the ASCE J. Environ. Eng. (1995)

[11] Kim S, Park JK, "Theoretical Determination of Energy Efficient Pyrolysis Process of Scrap Tire Rubbers," In Preparation to Submitted to the Environ. Sci. Technol. (1995)

[12] Mirmiran S, Pakdel H, Roy C, J. Anal. Appl. Pyrolysis, 22, 205 (1992)

[13] Ozawa T, J. Thermal. Anal., 2, 301 (1970)

[14] Pakdel H, Roy C, Aubin H, Jean G, Coulombe S, Environ. Sci. Technol., 25, 1646 (1991)

[15] Roy C, "Vacuum Pyrolysis of Scrap Tires," U.S. Patent, 4,740,270 (1988)

[16] Roy C, Labrecque B, deCaumia B, Resour. Conserv. Recycling, 4, 203 (1990)

[17] U.S. Environmental Protection Agency, "Markets for Scrap Tires," EPA/530-SW-90--074A (1991)

[18] Williams PT, Besler S, Taylor DT, Fuel, 69, 1474 (1990)