Page 333 - Petroleum and Gas Field Processing

12.6 SIMULATION PROBLEM FOR TEG DEHYDRATOR

In a gas field, natural gas is available at a flow rate of 10 MMSCFD and

at operating conditions of 900 psia and 80 F. The gas composition is given
as follows (mole fractions):
0.001 0.0148
N 2 C 3 H 8
0.0284 0.0059
CO 2 iC 4 H 10
H 2 S 0.0155 nC 4 H 10 0.0030 TEG 0.000
0.898 0.001 H 2 O 0.000
CH 4 iC 5 H 12
C 2 H 6 0.031 nC 5 H 12 0.005
The operating and design conditions of the TEG absorber are:
The flow rate of the TEG fed to the column is 2 gpm (US gallon)
at 900 psia and 120 F.

Number of trays are 14; with a tray efficiency 50% except the top
and bottom trays are 100% each.

SOLUTION

Using HYSYS process simulator licensed by Hypotech, the process flow
sheet for the proposed dehydration plant along with material and energy
balance calculations for all streams, are produced as presented in Figure
12 and Table 3.

REFERENCES

1. Engineering Data Book, 15th ed., Gas Processing Supplies Association, Tulsa,
OK, 1987.
2. Arnold, K. and Stewart, M., Surface Production Operations, Gulf Publishing,
Houston, TX, 1988, Vol. 2.
3. Abdel-Aal, H.K., Surface Petroleum Operations, Saudi Publishing and
Distributing House, Jeddah, 1998.
4. Sivalls. C.R., Glycol Dehydration Design Manual, Sivalls Inc., Odessa, TX, 1976.
5. Campbell, J.M., Gas Conditioning and Processing, Campbell Petroleum Series,
Vol. 1, Norman, OK, 1978.

Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved.