Study on the moisture sorption isotherm and net isosteric heat of sorption of tobacco
ZHANG Jun-song
LI Hao
HUO Xian-kuan
CUI Kai
HOU Peng-juan
LI Qiang
MA Ji
LI Shu-heng
LI Jun
Abstract：The change regularity of heat in adsorption and desorption process of tobacco was investigated,flue-cured tobacco,tobacco sheet,expanded stem,burley tobacco,oriental tobacco as the research objects.With equilibrium water content and water activity with different relative humidity were determined by static sulfuric acid method.The moisture sorption isotherms of tobacco,the water content of the single molecule layer and net isosteric heat of sorption were studied.Results indicated that:1 )GAB isotherm model was the tobacco optimal moisture sorption isotherms;2 )The variation range of single molecular layer water in tobacco samples was 0.046~0.1 03 g/g;3)The net isosteric heat of sorption decreased with the increase of water content.Under the normal water content conditions,burley tobacco,oriental tobacco,flue-cured tobacco,tobacco sheet, expanded stem required for moisture evaporation energy were in descending order.
Keywords：tobaccomoisture sorp-tion isothermwater activitynet isosteric heat of sorption
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 28-34 )