Question

Copper can be cemented onto iron particles by the reaction. Cu2+ + Fe = Cu + Fe2+. A dilute copper solution containing 0.50 g/L of copper is flowed continuously at a rate of 1 m3/h through a stirred tank reactor of volume 10 m3 containing 10 kg of suspended spherical iron particles with a diameter of Imm. The mass transfer coefficient of Cu2+ is 6 x 10-3 cm sl. (i) Calculate the concentration of copper ions in the discharge solution (solution leaving the reactor). You may need some of the information given below. (ii) What factors would you change to improve the reaction rate? Total surface area = 6m/(pd), d is the particle diameter Ps = 7.9 g cm² is the density of the solid particles and PL = 1.0 g cm’ is the density of the solution, C= {C/(1+kA/v)}