CORESTA Meeting, Smoke Science/Product Technology, 2013, Seville, ST 11

Research on dynamic changes of cut tobacco physical and chemical properties during the over-drying process

QIU Changgui(1); FENG Wenchao(1,3); LIU Ze(2); ZHU Yong(2); HE Banghua(2); WANG Hui(2); LI Jun(1); HOU Ying(1)
(1) Yunnan Reascend Tobacco Technology (Group) Co., Ltd., Kunming, P.R. China; (2) Technology Centre of Hongyun Honghe Tobacco (Group) Co., Ltd., Kunming, P.R. China; (3) Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, P.R. China

In order to investigate the dynamic changes of cut tobacco physical and chemical properties during the over-drying process, the moisture content, the filling values, the microstructure, the routine chemical components, the polyphenols content and the sensory quality were studied for cut tobacco during the over-drying process. The results showed that the physical properties significantly changed when the moisture content of cut tobacco during the over-drying process was 11.50% which was the critical point of the physical properties (the moisture content). The chemical properties and the sensory quality showed significant change also when the moisture content was 8.00% with the physical properties variation. The moisture content of 8.00% was the critical point of intrinsic quality of cut tobacco. The ratio of tissue vacuity in the microstructure of cut tobacco increased significantly when the moisture content was 6.00%, which was the critical point of microstructure of cut tobacco. And the processability of cut tobacco decreased significantly. Comprehensive evaluation was that 8.00% was the critical point of moisture content considering the sensory quality.