Drying Rate and Product Quality Evaluation of Roselle (Hibiscus sabdariffa L.) Calyces Extract Dried with Foaming Agent under Different Temperatures

Table 3

The constants of roselle extract drying at different temperature.

T (°C)	Nonfoam					Foam
	(min^−1)	0^9; (m^2 min^−1)			Ea; (kJ mol^−1)	(min^−1)	0^9; (m^2 min^−1)			Ea; (kJ mol^−1)
40	0.017	3.13	0.90	2.38	29.77	0.052	8.56	0.92	3.12	19.92
50	0.026	4.28	0.86			0.071	11.69	0.93
60	0.030	4.94	0.87			0.076	12.51	0.87