Page 174 - Gas Purification 5E

Alkanolamines for Hydrogen Sulfide and Carbon Dioxide Removal 161

Table 2-30
Comparison of LPG Treater Operating Data with LLE Calculations

Case 1 2 3
Plant Plant Plant
Data Calculated Data Calculated Data Calculated
Hydrocarbon
Rate, am 100 103 780 780 208 210
T,"F 50-60 55 90 90 77-89 83
P, psig 500 500 535 535 835 835
COz in, ppm 10,000 10,000 2,030 2,023 33,000 33,000
H2S in, ppm - - Trace 2.7
CO, out, ppm 0 0.056 e100 0.42 Trace 0.4
H2S out. ppm - - - 0.01 - -
Amine MEA MEA MEA MEA MEA MEA
wt% 20 20 15 15 20 20
Flow, gal/min 10.8 10 34 34 54 50
Ideal Stages** - 3 - 2 - 2
Lean Loading* 0.10 0.108 0.10 0.13 0.10 0.1 1
Rich Loading* 0.44 0.44 0.28 0.32 0.53 0.53
Contactor three 124 sections of two 124 sections of
psckitlg Packing 18 ft of packing
Packing Type 1-in. Intalox - -
-
..
Contactor. Diam., in. 30 - 48
Case 4 5 6
Plant Plant Plant
Data Calculated Data Calculated Data Calculated
Hydrocarbon
Rate, gpm 265 273 42 44 21 22
T,"F - 80 80-90 85 - 85
P: psig 305 305 - 200 265 265
COz in, ppm 2,460 2,450 5,000 5,020 nil -
H2S in. ppm 270 270 - - 1,080 1,080
C02 out, ppm Trace 1.2 100 47 - -
H2S out, ppm nil 5.9 - - nil 9.2
Amine DEA DEA MEA MEA MEA MEA
wt%. 20 20 a 8 5 5
Flow,gal/min. 20 20 5.3 5.3 5 5
Ideal Stages** - 2 - 1 - 1
LeanLoading* 0.07 0.05 0.10 0.10 0.07 0.07
Rich Loading* 0.30 0.27 0.44 0.13 0.13 0.13
Contactor two 8-ft sections of packing 10 perforated trays jet eductor-mixer
Packing Type 1%" ceramic
Contactor Diam.. in 66

(table continued on nextpage)