Question 4 (20 points): a) Below is a sketch showing the exit conversion as a function of catalyst particle size in a packed bed reactor. Why does the conversion increase with increasing particle size in region A? A B X Dp b) The species A and B react to form species C, D, and E in a packed bed reactor. The catalyst does not decay. The following profiles were obtained. Explain what might cause the conversion to level off? Also comment if decreasing the flow rate will increase the conversion. X 4 0 W