Chemical Process Design

SHORT CUT for ABSORBERS COLUMS SIZING
Sizing similar to the distillation columns
N T Kremser equation
n n n n
⎡l
+ ( r − A ) v ⎤
0
E N+
1
n
N = ln⎢
/ ln( A )
n n
n n
E
l A ( 1 r ) v
⎥
⎣ − −
0 E
N+
1 ⎦
• Assumption: v-l equilibrium but actually there is mass transfer phenomena (e.g.
simulation of CO 2 - MEA absorption) 20% efficiency in nº trays N = N T /0.2
• Calculate H and D for costing vessel and stack trays (24” spacing)
E1
20