Page 159 - Chemical process engineering design and economics

142 Chapter 3

Table 3.5.8 Summary of Stream Properties—Methanol Synthesis
Process

Line Temperature Pressure 1 Flow Composition, Mole Fraction
No. »c bar Rate"
kgmol/h
CH« H 20 H, CO COj N 2 CHjOH
1 40 94.32 5184 0.0085 - 0.7800 0.0600 0.1500 0.00150 -
2 40 94.32 16816 0.03009 - 0.9041 0.0208 0.03972 0.005309 -
3 - 100.68 22000 0.02500 - 0.8748 0.03004 0.06571 0.004412 -
4 270 95.68 20000 0.0275 0.03597 0.8264 0.01901 0.03631 0.004853 0.0500
5 40 94.32 20000 0.0275 0.02500 0.8264 0.01901 0.03631 0.004853 0.0500
6 40 0.78 1719 - 0.4184 - - - - 0.5816
7 - 94.32 18281 0.03009 - 0.9041 0.0208 0.03972 0.005309 -
8 40 94.32 I46S 0.03009 - 0.9041 0.0208 0.03972 0.005309 -
a) Multiply by 0.9869 to convert to atmospheres.
b) Multiply by 2.205 to convert to lbmol/h.

Nomenclature

English

A area

a constant in the heat-capacity equation or in Redlic-Kwong's equation

b constant in the heat-capacity equation or in Redlic-Kwong's equation
c constant in the heat-capacity equation

heat capacity at constant pressure
C P
C cost

direct cost
C D
CG general cost

Q indirect cost

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