It is desired to produce a hot vapor stream of benzene to feed a reactor for a certain petrochemical process. The benzene is available from an off-site storage facility at 1 atm pressure and ambient temperature (assume 25°C), and the reactor requires the benzene to be at 250°C at 10 atm. Two possible process schemes are being considered to heat and pressurize the feed: 

(1) Pump the liquid benzene to pressure and then vaporize it in a heat exchanger, and 

(2) Vaporize the benzene first and then compress it to the desired pressure. Answer the following:

1. Discuss qualitatively which scheme (if either) is better.

2. Confirm your answer to Part (a) by comparing the costs using both schemes to feed 1000 kg/h of benzene to the reactor. (Assume that the cost of heating is $15/GJ and that electricity costs $0.06/kWh.)