Page 162 - Gas Purification 5E

Table 2-26
Organic Suhr Removal by DGA Solution

cos CH3SH

Sour Gas, ppmv
Te.st A 44.1 85.2 28.4
Test B 54.2 78.1 33.5
Test C 54.4 85.0 29.9
Sw7eet Gas, ppmv
Test A 4.4 63.3 27.5
Test B 4.2 74.5 29.4
Test C 7.4 75.6 23.6
Average Removal, '32 90 14 12
Abres:
I. Tests -4, B. and C were conducted about I week apart on the Beiri gas plant in Saudi Arabia.
2. Inlet gas averaged about 6.8% H-S.
3. Solution contained j&S% DG.4.
Source: Hwal and van de Venne (1981)

Table 2-27
Operating Data from a Commercial MDEA Selective Natural Gas Treater

Gas Feed Rate, MMscfd 80
Absorber Pressure, psig 940
Feed Gas Temperatures,"F 90
Feed Gas Analysis
HIS. ppm 40-60
co:, vol% 3.83
Test Number 1 2 3 4 5 6 7 8
Feed Tray 0 10 10 10 0 0 20 10
Amheconcentration, %MDEA 39 53 53 49 49 46 46 43
Amine Feed Temperature,"F 117 117 116 111 132 114 114 116
Amine Circulation Rate(') I I L I 1 I 1 H
CO-, Slippage %(2) 61 70 75 70 65 70 53 60
,Votes:
1. L = low amine circulation rate (I pump), I = intermediate amine circulation rate @pumps), H =
high amine circulation rate (3 pumps). dcmaljlow rates not reported.
2. H-S in product gas less than 1 ppm unless shipping is inadequate. At minimum amine solution
flow rate and mininium number of trqs, a steam rate of 1.2 Ib/gallon caused H$ content ofprod-
iict gas IO be Ippm, but increasing steam rate to 1.44-1.56 Ib/gallon produced gas conraining
less than 1 ppm H,S at all absorber conditions.
Source: Table based on data reported by Ammons and Sitton (1981)