Drying Kinetics and Desorption Isotherms of Chondracanthus chamissoi (C. Agardh) Kützing, 1843 at Different Temperatures

This study is aimed at modeling the water sorption isotherms and air-drying kinetics of Chondracanthus chamissoi in tetrasporophyte and carposporophyte stages. A convective dryer was used for the desorption experiments at 25°C, 40°C, and 55°C, using the GAB (Guggenheim–Anderson–de Boer), BET (Brunauer–Emmett–Teller), Halsey, and Oswin equations. The best fit for both phases was achieved using the GAB model, as evidenced by the highest R² values (0.9988 for the tetrasporophyte at 55°C and 0.9985 for the carposporophyte at 40°C) and the lowest RMSE values (0.0058 for the tetrasporophyte at 55°C and 0.0075 for the carposporophyte at 40°C). Drying experiments were conducted in a climatic chamber at four different air temperatures: 40°C, 50°C, 60°C, and 70°C. The drying behavior was analyzed using Newton, Henderson–Pabis, Page, and Modified Page models. When comparing experimental moisture ratio values with calculated MR values, the Modified Page model was found to have the best fit with the same statistical test for both phases. Therefore, both equations efficiently simulate the C. chamissoi drying process and are an excellent tool for estimating drying time.