Moisture retention of blended cut tobacco dried by different methods

In order to investigate the effects of drying methods on the moisture retention of the same blended cut tobacco, a dynamic moisture detection method was used to study the adsorption and desorption performance of blended cut tobacco dried by pneumatic drying and cylinder drying under different RH conditions. The results showed that: 1) In the process of adsorption and desorption, the mass change rate (dm) of tobacco dried by pneumatic drying was higher than that by cylinder drying, the exchange capacity between tobacco dried by pneumatic drying and the water vapor in air was larger. 2) In the process of adsorption and desorption, the variation of equilibrium moisture content in tobacco dried by pneumatic drying was higher than that by cylinder drying, and the difference of equilibrium moisture content between the two kinds of tobacco increased with the increase of RH. 3) The moisture ratio (MR) curves of the two kinds of tobacco in the process of adsorption and desorption presented the same trend. 4) Under the initial condition (RH 40%), the moisture retention of tobacco dried by pneumatic drying was better. 5) In the process of adsorption and desorption, the moisture retention of tobacco dried by cylinder drying was slightly better than that by pneumatic drying at higher RH (>60%); while it was contrary at lower RH (≤60%).