DRYING CHARACTERISTICS OF CORIANDER (CORIANDERUM SATIVUM L.) WASTE AND PEA SHELLS USING INFRARED AND HOT AIR DRYING
Thin layer experiments were carried out to determine the fundamental drying characteristics of coriander waste (stems and roots after removing leaves and soft stems) and green pea shells (after removing green peas).Drying was conducted at varying drying temperatures (50,60,70 and 760C) in a hot air convective drier and using infrared dryer.It was found that the drying rate increases with increase in drying temperature.Drying took place in the falling rate period during hot air drying and falling as well as constant rate period during infrared drying (4.2 kw/m2) for coriander waste.In case of green pea shell,both falling rate and constant rate drying was observed during infrared (3.6 kW/m2) as well as during hot air drying.Several thin layer drying model namely Newton,Page,modified Page,modified Page II,Henderson and Pabis were fitted into the data and good agreement with models were observed.For each model R2,chi square,RSME and Po(%) were calculated.Effective diffusivities were found in the range of 1.24 to 6.62x10-10 m2/s and 1.94 to 4.67x10-10 m2/s for coriander waste and green pea shell respectively.Temperature dependence of the rate constant was adequately described by the Arrhenius equation and the activation energy values for coriander waste and green pea waste were 35.69 and 28.55 kJ/ mol respectively.
coriander leaves green pea waste drying Page’s model effective diffusivity
S.P.Shingare B.N.Thorat
Advanced Drying Laboratory,Department of Chemical Engineering,Institute of Chemical Technology Matunga(E),Mumbai-400019,India
国际会议
The 18th International Drying Symposium Conference(第十八届国际干燥学术大会(IDS2012))
厦门
英文
1-8
2012-01-11（万方平台首次上网日期，不代表论文的发表时间）