Abstract
Convective drying of glass beads packed beds containing NaCl aqueous solution, under a wide range of gas temperature and humidity (room air to superheated steam), and the relationship between surface salt deposition, material temperature and moisture content changes, was investigated. In the case of high gas temperature and low humidity, salt deposition was evenly distributed across the bed surface, and salt crystallization was observed to begin at high moisture content. Drying proceeded over two stages of distinctly different drying rates. At high humidity, salt crystallization was observed to begin at lower moisture content, and was unevenly distributed across the bed surface.
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