Page 326 - Petroleum and Gas Field Processing

Figure 10 Temperature profile for a two-tower operation.

1. For given gas flow rate V (MMSCF/d) and water content Y 1
(lbs H 2 O/MMSCF), calculate the water to be adsorbed from the
gas as

Water adsorbed VY 1
¼ ð9Þ
Cycle 3
Assuming three cycles, each cycle is 8 h in one day.
2. If the particle size of the bed is known D P (ft), calculate the
superfacial velocity
1=2

ft D P
V g as V g ¼ 540 ð10Þ
min g
3
where g is the gas density (lb/ft ).
3. Calculate the bed diameter d (ft) from
1=2
25VZ g T g
d ¼ ð11Þ
PV g
2
4. Calculate the water loading q (lbs/ft h) using

VY 1
q ¼ 0:053 ð12Þ
d 2

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