A Simple Freeze Dryer for Dehydration of Roses

Chemical Product Design and Engineering (CPD&E)

Chemical Product Design & Engineering - Poster (CPD&E - P)

Dr Seyed Hassan Hashemabadi
Iran University of Science & Technology ( IUST )
Chemical Engineering
Tehran
Islamic Republic of Iran

Mr Farzin Aghili
Iran University of Science and Technology
Chemical Engineering

Islamic Republic of Iran

Mr Fatemeh Shams
Iran University of Science and Technology
Chemical Engineering

Islamic Republic of Iran

Keywords: freeze dryer, dry ice, rose, drying curve

In this work, with a simple freeze dryer has been reported drying curve of roses. Powdered dry ice which has -78.5 ºC sublimation temperature, has been used for freezing cycles and vacuum oven as freeze drying chamber. During the process, the pressure of chamber has been kept below the triple point of water (< 0.01 atm). Primary and secondary stages of drying for two samples of roses in drying curve have been specified. The results show in constant drying condition, sample weight affects the drying curve and in constant chamber pressure, increasing of temperature decreases the drying time.

Presented Wednesday 19, 13:30 to 15:00, in session Chemical Product Design & Engineering - Poster (CPD&E - P).