Material and Energy Balances P2.17
Introduction To Material and Energy Balances by G.V. Reklaitis Problem 2.17 A slurry consisting of CaCO3 precipitate in a solution of NaOH and H2O is washed with an equal mass of a dilute solution of 5% (wt) NaOH in H2O. The washed and settled slurry which is withdrawn from the unit contains 2 lbm of solution per 1 lbm of solid (CaCO3). The clear solution withdrawn from the unit can be assumed to have the same concentration as the solution withdrawn with the solids (see the Figure P2.17). If the feed slurry contains equal mass fractions of all components, calculate the concentration of the clear solution. Answer (Figure P2.17) Let's make DOF (Degree Of Freedom) Subsidiary Relation 1. A slurry consisting of CaCO3 precipitate in a solution of NaOH and H2O is washed with an equal mass of a dilute solution of 5% (wt) NaOH in H2O. It’s made F1= F2 2. The washed and settled slurry which is withdrawn from the unit contains 2 lbm of solution per 1 lbm of solid (CaCO3...
