Dehydration kinetics of sodium perborate tetrahydrate to monohydrate in a fluidized-bed drier

Sahin Ö., Bulutcu A.

CHEMICAL ENGINEERING SCIENCE, cilt.54, sa.1, ss.115-120, 1999 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 54 Sayı: 1
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1016/s0009-2509(98)00171-7
  • Dergi Adı: CHEMICAL ENGINEERING SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.115-120
  • Anahtar Kelimeler: sodium perborate, dehydration kinetic, bulk density, fluidized bed drier, activation energy
  • İstanbul Teknik Üniversitesi Adresli: Hayır

Özet

Dehydration kinetics of sodium perborate tetrahydrate to monohydrate is investigated at four different temperatures between 314.7 and 331 K in a controlled fluidized-bed drier. During the dehydration, no thermal decomposition of sodium perborate to sodium metaborate is observed. First-order kinetic behavior in this conversion is proved and the activation energy for dehydration is calculated as 80.18 kJ/mol. Effect of temperature on the bulk density of the product is given and compared with theoretical calculations. Change in the bulk density is attributed to two different competitive effects, one is shrinking and the other is puffing. Bulk density of the product can be adjusted by controlling these two parameters. (C) 1998 Elsevier Science Ltd. All rights reserved.