Kinetic analysis of thermal decomposition of boric acid from thermogravimetric data


Sevim F. , Demir F. , BİLEN M., Okur H.

KOREAN JOURNAL OF CHEMICAL ENGINEERING, cilt.23, ss.736-740, 2006 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 23 Konu: 5
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1007/bf02705920
  • Dergi Adı: KOREAN JOURNAL OF CHEMICAL ENGINEERING
  • Sayfa Sayısı: ss.736-740

Özet

The kinetics parameters of the th ermal 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 bone 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 center dot mol(-1) and 3.82 x 10(4) min(-1) for region I and 4.79 kJ center dot mol(-1) and 4.045 X 10(-5) min(-1) for region II, respectively. The activation energies and frequency factors were found as 4.45 kJ center dot mol(-1) and 4.08 x 10(8) min(-1) for the Suzuki method.