Hot-Air Drying and Rehydration Characteristics of Red Kidney Bean Seeds

DOYMAZ İ.

CHEMICAL ENGINEERING COMMUNICATIONS, cilt.203, sa.5, ss.599-608, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 203 Sayı: 5
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1080/00986445.2015.1056299
  • Dergi Adı: CHEMICAL ENGINEERING COMMUNICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.599-608
  • Anahtar Kelimeler: Bean seeds, Effective moisture diffusivity, Hot-air drying, Mathematical modeling, Pretreatment, MOISTURE DIFFUSIVITY, KINETICS, PRETREATMENTS, VACUUM, DEHYDRATION, MICROWAVE, MODEL
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

The effects of pretreatments such as citric acid and hot water blanching and air temperature on drying and rehydration characteristics of red kidney bean seeds were investigated. Drying experiments were carried out at four different drying air temperatures of 50 degrees C, 60 degrees C, 70 degrees C, and 80 degrees C. It was observed that drying and rehydration characteristics of bean seeds were greatly influenced by air temperatures and pretreatments. Four commonly used mathematical models were evaluated to predict the drying kinetics of bean seeds. The Weibull model described the drying behaviour of bean seeds at all temperatures better than the other models. The effective moisture diffusivities (D-eff) of bean seeds were determined using Fick's law of diffusion. The values of D-eff were between 1.25x10(-9) and 3.58x10(-9)m(2)/s. Activation energy was estimated by an Arrhenius-type equation and was determined as 24.62, 21.06, and 20.36kJ/mol for citric acid, blanch, and control samples, respectively.