Page 136 - Chemical process engineering design and economics

120 Chapters

Table 3.4.1 Summary of Equations for Calculating Heat Transfer to a
Reactor___________________________________

Subscripts: CH 3OH = 1,0 2 = 2, CH 2O = 3, H 2O = 4, N 2 = 5

Mole Balances

Ys.i m 3 = y 4,i m, + x/ y 3>1 m 3 (3.4.4)

(3.4.5)
y 3, 2 m 3 = y 4>2 m, + (1 /2) x t' y 3>i m 3
x/ y 3,i m 3 = y 4, 3 m, (3.4.6)

xi' y 3,i m 3 = y 4;4 m, (3.4.7)
y3,s m 3 = y 4j5 iru (3.4.8)

yj,i + Y3.2 + y 3;5 = 1 (3.4.9)
y4,i + y 4,2 + y4,3 + y^ + y 4,5 = 1 (3.4. i o)

Reaction Specification

y 3 ,2/y3,i= (0.80) (1/2) (3.4.11)

Energy Balance

Ah 3 m 3 + Ah R' x^ y 3 ] m 3 = Q - Ali» m, (3.4.12)

Thermodynamic Properties

(3.4.13)
ha = ys,i h 3,i + y 3, 2 h 3>2 + y 3>5 h 3, 5
lu = ^i ^i + y 4;2114,2 + y 4, 3 h4 j3 + y 4i4 \ A + y 4j5 h 4 (3.4.14)

h 3,, = f(T 3') (3.4.15)
h 3>2=f(T 3') (3.4.16)

h 3,5 = f(T 4') (3.4.17)

Copyright © 2003 by Taylor & Francis Group LLC