Dehydration kinetics of howlite, ulexite, and tunellite using thermogravimetric data

Erdogan Y., Zeybek A., Şahin A., Demirbaş A.

Thermochimica Acta, cilt.326, sa.1-2, ss.99-103, 1999 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 326 Sayı: 1-2
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1016/s0040-6031(98)00591-7
  • Dergi Adı: Thermochimica Acta
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.99-103
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

In this study, some boron mineral samples (howlite, ulexite and tunellite) have been analysed by DTA and TG methods. The thermochemical reactions of these boron compounds have been studied. The dehydration kinetic parameters for howlite, ulexite and tunellite were activation energies: 65.0, 39.5 and 50.4 kJ mol-1; the pre-exponential factors: 50.8×105, 6.60×105, 32.4×105 s-1 and rate constants: 70.1, 113.1 and 82.3 s-1, respectively, at a constant heating rate of 10 K min-1. The average particle size was 200 μm for all samples. The order of dehydration reactions (n) was accepted as first order.