Paper Title:
Estimation of Effective Moisture Diffusivity in Starchy Materials Following Hydrothermal Treatments
  Abstract

Two hydrothermal treatment processes (DV-HMT and DIC treatment) were investigated on standard maize starch for three processing temperatures; 100, 110 and 120°C. The gravimetric change of starch powder during the treatment was analyzed by a simultaneous water diffusion and starch reaction model. The effective diffusivity coefficient (Deff) and reaction rate constant (k) were estimated by minimizing the error between experimental and analytical results. The values of Deff and k clearly increased with temperature. The degree of starch melting was evaluated for the two treatments using the first-order reaction model as a function of processing time. The results suggest that the absorption process is controlled by water–starch reactivity that induces melting phenomenon of starch crystallites, which progresses when temperature increases. The two hydrothermal treatments considerably differ: DIC being more prone to water absorption as demonstrated by the values of Deff and k.

  Info
Periodical
Defect and Diffusion Forum (Volumes 312-315)
Edited by
Andreas Öchsner, Graeme E. Murch and João M.P.Q. Delgado
Pages
364-369
DOI
10.4028/www.scientific.net/DDF.312-315.364
Citation
S. A. Bahrani, C. Loisel, J. Y. Monteau, S. A. Rezzoug, Z. Maache-Rezzoug, "Estimation of Effective Moisture Diffusivity in Starchy Materials Following Hydrothermal Treatments", Defect and Diffusion Forum, Vols. 312-315, pp. 364-369, 2011
Online since
April 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Xin Yi He, Jin Fu Liu, Li Li Cheng, Bu Jiang Wang
Abstract:Drying characteristics of crispy winter jujube dried by explosion puffing drying at different vacuum drying temperature were investigated....
2505
Authors: Miloš Vasić, Zagorka Radojević
Chapter 3: Characterization, Modeling and Simulation of Mechanical Processes
Abstract:This paper represents the upgrade of our previous study in which we have presented a model for simulation of the drying kinetic and...
506
Authors: Yan Hua Dong, Rui Yun Yang, Juan Wei, Yong Xue, Ru Xiang Wang, Zhen Tao Zhang, Lu Wei Yang
Chapter 8: Environmental Engineering, Eco-Protection, Environment Management and Biotechnology
Abstract:Drying characteristics of Thomson seedless grape at different drying temperatures (45°C, 40 °C, 35 °C and 30 °C) were investigated in a...
3036
Authors: R.J. Brandão, L.D.M. Santos, L.G. Marques, M.M. Prado
Abstract:A hybrid drying process based on the application of infrared (IR) radiation combined to non-heated air flow was proposed for bee-pollen...
9