For the vinyl-chloride process, using heats of formation, heat capacities, and latent heats, carry-out energy balances to determine the heats liberated and absorbed in the two reaction operations. Those computed using ASPEN PLUS, as shown in Figure 2.3, are:

(a) Direct chlorination \(=150\) million \(\mathrm{Btu} / \mathrm{hr}\); note the reactants are at \(25^{\circ} \mathrm{C}\) and the effluent stream is at \(90^{\circ} \mathrm{C}\); the pressure is \(1.5 \mathrm{~atm}\).

(b) Pyrolysis \(=52\) million Btu/hr; the reactant is at \(90^{\circ} \mathrm{C}\) and the effluent stream is at \(500^{\circ} \mathrm{C}\); assume the pressure is \(1 \mathrm{~atm}\).

Figure 2.3:-

Transcribed Image Text:

Heat Liberated by Reaction = 150 x 10 Btu/hr Heat Absorbed during Reaction = 52 x 10' Btu/hr HCI 58,300 lb/hr Cl 113,400 lb/hr Direct Chlorination 90C, 1.5 atm CHC Pyrolysis 500C HCI CHCI 158,300 lb/hr 26 atm CHCh CH 44,900 lb/hr CHCI 100,000 lb/hr CH+Cl CHCh CHC CHCl + HCl 105,500 lb/hr