The feed to an methanol synthesis reactor contains hydrogen, carbon monoxide and carbon dioxide (which is kept at 0.54 mole %).. The mole ratio of hydrogen to carbon monoxide is 2.05:1. The flow rate of the stream is 3000 kg h1. Calculate the flow rate of carbon dioxide in kg h1.

Molecular weight of carbon monoxide = 28, Molecular weight of hydrogen = 2 Molecular weight of carbon dioxide = 44

(10 marks)

(b) For the chemical reaction A P, it has been found that for a fixed initial concentration of A (CA0) and a fixed reaction temperature T, the concentration of P, CP varies with time t according to the formula

C =C (1expkt) P A0

where k is known as the reaction rate constant, and is a function of T only..

A laboratory collected experimental results of CP vs t for a fixed CA0 and T. If the given formula is

correct, what plot would yield a straight line and how can that be used go determine the constants CA0 and k from the experimental data?

(7 marks)

(c) A perfectly mixed vessel initially contains 200 kg of a saturated solution of NaNO3 (i.e. 90 kg NaN03 in 100 kg water). Pure water is added at a rate of 100 kg min1 and the solution is withdrawn at 100 kg min1. Determine the mass fraction of NaNO3 in the tank after 5 minutes..