(A)
Interpretation:
The labeled flow diagram should be drawn.
Concept Introduction:
Hydrocarbon gas enters at 500 o C and it is combined with light oil at 25 o C.
The combined stream leaves at 200 o C
Hydrocarbon gas Temperature, T1=500 oC
Light oil Temperature, T2 = 25 oC
Exit Combined stream Temperature, T3= 200 oC
(B)
Interpretation:
D/F ratio should be determined.
Concept Introduction:
The general energy balance of the mixing process is given as below for an adiabatic vessel: -
Where,
CPgas = Molar heat capacity of hydrocarbon gas=150 J/(mol.K)
CPoil = Molar heat capacity of light oil = 200 J/(mol.K)
R = Universal Gas Constant
T1 =Inlet temperature of Hydrocarbon gas = 500oC
T2 =Inlet temperature of Light oil = 25oC
T3 =Inlet temperature of Mixed stream = 200oC
F = Molar feed rate of hydrogen gas
D = Molar feed rate of light oil
(c)
Interpretation:
To explain the advantage of using a liquid rather than cooler gas
Concept Introduction:
Quenching is defines as rapid cooling of a substance using a medium such as oil in this case.
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Introduction to Chemical Engineering Thermodynamics
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