Consider a chemical process to produce bentene at a rate of 9500 kefhr with product benaene (purity 99.774). A process based on hydroalkylation (HAD) is considered. Figure 1 shows a simplified PFD diagram for HDA process. The basic unit operations of this process: reactor, fumace, vapor liquid separator, recycle compresior, two heat exchangers and three distillation columns. Two rarw materials, hydrogen and toluene, are converted into bentene (main product), with methane and diphenyl produced as by products. The two vapor-phase reactions are: C4+H2C4H4+CH4(1)2C4HlsC22H2n+H2(2) The kinetic rate expressions are functions of the partial paresure (in psia) of tolisene Ple. r2=5.987104exp(T25,616)Pher2.553104exp(T25.616)PDpPMHrm=0 Where rr and rz have units of fbmol/min. ft3 and T(K) The flowiseet and key process streams for the process is ghea in Figure 1 and Table 1. i. Evaluate the equilibrium conversion at 1150F. ii. If the amount of hydrogen in the feed to the reactor is reduced to the stoichioenetric amount determine the etfect on the equilarium comversion at 1150F. iii. What is the effect of reducing temperature from 1150F to 750F on the reaction rate, and reactor size? comment on your anwer. iv. Determine the etfect of reducing reaction pressure (to atmospheric) on the reaction rate? comment on your answer. v. It was decided to reduce the pressure of stream 3 price to venting to atmosphere. Use heuristics 41 and 42 to determine whether or not an expander should be put in glace, or a simple valve? 41. Determine the temperatute of the feed entering the heat exchanger [Hit.Ex.] (assume 7 pai pressure drop across the ewchanger). Do you consider the heat integration for this exchanger "good or or poor" one. vii. Why does the stabilizer operate at 113F and 480 psia? viii. Why does the product column operate with the top pressure (5tream 5) at 30 psia? Table 1 Key process streams for the conventional HDA Process