A stream of hydrocarbon gas at 500oC is cooled by continuously combining it with a stream of light oil in an adiabatic tower. The light oil enters as a liquid at 25oC; the combined stream leaves as a gas at 200oC.
(a) Draw a carefully labeled flow diagram for the process.
(b) Lei F and D denote respectively the molar mass of hot hydrocarbon gas and light oil. Use data given below to determine a numerical value for the oil-to-gas ratio D/F. Explain your analysis.
(c) What is the advantage to quenching the hydrocarbon gas with a liquid rather than with another (cooler) gas? Explain.
Data CEP (ave) = 150 J mol-1 K-1 for the hydrocarbon gas.
CEP (ave) = 200 J mol-1 K-1 for the oil vapor.
ΔH1e (oil) = 35.000 J mol-1 at 25 C.