Water sorption isotherms and air drying kinetics modelling of the brown seaweed Bifurcaria bifurcata

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• 作者：Ramón Moreira ; Francisco Chenlo ; Jorge Sineiro…
• 关键词：Enthalpy ; Entropy ; Equilibrium moisture content ; Page model ; Thermodynamics ; Water activity
• 刊名：Journal of Applied Phycology
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：28
• 期：1
• 页码：609-618
• 全文大小：563 KB
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• 作者单位：Ramón Moreira (1)
  Francisco Chenlo (1)
  Jorge Sineiro (1)
  Marivel Sánchez (1)
  Santiago Arufe (1)
  
  1. Chemical Engineering Department, University of Santiago de Compostela, Rúa Lope Gómez de Marzoa s/n, 15782, Santiago de Compostela, Spain
  
• 刊物主题：Plant Sciences; Freshwater & Marine Ecology; Plant Physiology; Ecology;
• 出版者：Springer Netherlands
• ISSN：1573-5176

文摘

Air drying kinetics at 35, 50, 60 and 75 °C and water adsorption and desorption isotherms at 5, 25, 40 and 55 °C of the brown seaweed Bifurcaria bifurcata were obtained. Water sorption isotherms were modelled by means of the two-parameter Halsey model. A model to estimate equilibrium moisture content of adsorption and desorption processes as function of water activity and temperature simultaneously was obtained by means of linear correlations of Halsey model parameters with temperature. Water sorption isotherms were analysed by a thermodynamic approach to obtain properties such as net isosteric heat of sorption, net equilibrium heat, differential and integral entropy. Monolayer moisture content evaluated by BET model corresponded to the moisture content at which local minimum integral entropy value was observed for sorption processes. Air drying kinetics at different temperatures were modelled using the Page model. The two parameters of the Page model were linearly correlated with temperature. The goodness of the fits was evaluated by evaluation of the coefficients of determination and root mean square errors. Keywords Enthalpy Entropy Equilibrium moisture content Page model Thermodynamics Water activity