Answer Happy

3. You plan to use a reactor which was purchased from a now-defunct company to carry out the elementary liquid phase reaction A+B under isothermal conditions, where k=0.2 min.'. The reactor is in a fancy-looking case and is welded shut so you can't see inside. There is a motor on it and it has ports labeled "feed" and "effluent”. A pulse tracer experiment at a volumetric flow rate of v=0.1 dm /min yielded the following experimental tracer data: t(min) 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 C (mol/L) 0 0 2.6 3.8 4.3 4.1 3.5 3.2 2.6 1.7 1.1 0.6 0.2 0 0 (a) Using this tracer data, (i) plot E(t) and F(t) for 0 <t<24 min, (ii) calculate the mean residence time (tm) and variance (), and estimate the total reactor volume assuming t= tm, and (iii) calculate predicted conversion assuming complete segregation. (7 pts) (b) You suspect that the black-box reactor contains multiple CSTR reactors in series. Using results from (a), employ the tanks in series (TIS) model for this reactor. (i) How many CSTRs do you think are in the box based on the E(t) data? What is the approximate volume and space time of each CSTR? (ii) Plot the model Eſt) with the tracer Et). Calculate the predicted conversion using the TIS model and compare with the result from (a). Why might differences arise? (8 pts)