Transport Processes and Separation Process Principles (Includes Unit Operations) Fourth Edition

PROBLEMS

14.2-1.	Constant-Pressure Filtration and Filtration Constants. Data for the filtration of CaCO3 slurry in water at 298.2 K (25°C) are reported as follows (R1, R2, M1) at a constant pressure (−Δp) of 46.2 kN/m2 (6.70 psia). The area of the plate-and-frame press was 0.0439 m2 (0.473 ft2) and the slurry concentration was 23.47 kg solid/m3 filtrate. Calculate the constants α and Rm. Data are given as t = time in s and V = volume of filtrate collected in m3. V × 103 t V × 103 t V × 103 t 0.5 17.3 1.5 72.0 2.5 152.0 1.0 41.3 2.0 108.3 3.0 201.7
A1:	Ans. α = 1.106 × 1011 m/kg (1.65 × 1011 ft/lbm), Rm = 6.40 × 1010 m−1 (1.95 × 1010 ft−1)
14.2-2.	Filtration Constants for Constants-Pressure Filtration. Data for constant-pressure filtration at 194.4 kN/m2 are reported ...