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Received April 6, 2004
Accepted May 11, 2006
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Kinetic analysis of thermal decomposition of boric acid from thermogravimetric data
Department of Chemical Engineering, Engineering Faculty, Atat"urk University, 25240, Erzurum, Turkey 1Research and Development Dept., Eti Holding A.S., stanbul Yolu "Uzeri, 9. km, G"uvercinlik, Ankara, Turkey
fsevim@atauni.edu.tr
Korean Journal of Chemical Engineering, September 2006, 23(5), 736-740(5), 10.1007/BF02705920
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Abstract
The kinetic parameters of the thermal decomposition of boric acid have been investigated by using TGA data. Suzuki and Coats-Redfern methods have been applied for the kinetic investigation. It was determined that decomposition kinetics of boric acid occurred in two steps and both regions suitably fit a first-order kinetic model. According to Coats-Redfern method, the activation energy and frequency factor were found as 79.85 kJ·mol.1 and 3.82×104 min.1 for region I and 4.79 kJ·mol.1 and 4.045×10.5 min.1 for region II, respectively. The activation energies and frequency factors were found as 4.45 kJ·mol.1 and 4.08×108 min.1 for the Suzuki method.
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ERSAHAN H, EKMEKYAPAR A, SEVIM F, Int. J. Miner. Process., 42(1), 121 (1994)
Kocakusak S, Akcay K, Ayok T, Koroglu J, Savasci T, Tolun R, “Ak kan yatakta bor,” Tubitak Ara t rma Merkezi, Rapor No:KM 323 (1998)
Kraschwit JI, Kirk-othmer enyclopedia of chemical technology, John Wiley and Sons, New York, 22 (1997)
Marano RT, Shuster ER, Inorganic materials and physical chemistry, R. F. Schuwenber and P.D. Garn (Eds.), Academic Press, New York, 709 (1969)
Okur H, Eymir C, Ind. Eng. Chem. Res., 42(15), 3642 (2003)
Olszak-Humienik M, Mozejko J, Journal of Thermal Analysis and Calorimetry, 56, 829 (1999)
Park JW, Oh SC, Lee HP, Kim HT, Yoo KO, Korean J. Chem. Eng., 17(5), 489 (2000)
Piskin S, PhD Thesis, stanbul Technical University, Metallurgy Dept., stanbul, Turkey, 22 (1983)
Suzuki M, Misic DM, Koyama O, Kawazoe K, Chem. Eng. Sci., 33, 271 (1987)
Sener S, Ozbayoglu G, Demirci S, Thermochim. Acta, 362, 107 (2000)
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Yun Y, Lee GB, Korean J. Chem. Eng., 16(6), 798 (1999)
Zachariasen WH, Acta Crystallogr., 16, 380 (1963)
