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Appendix C: Key Parameters for the Fractionation Train
2.C
Table 2.C.1 Fractionation train column parameters for the base case (Feed #3).
| Column | Feed flow rate (MMSCFD) | T (°F) | P (psig) | Number of trays | Light/heavy key |
| Deethanizer | 27.1 | 38.8–159 | 285–292 | 35 | Ethane/propane |
| Depropanizer | 17.9 | 104–187 | 190–193 | 36 | Propane/i‐butane |
| Debutanizer | 8.09 | 163–219 | 135–140 | 60 | n‐Butane/pentane |
| C4 splitter | 5.74 | 147–179 | 120–140 | 60 | i‐Butane/n‐butane |
Feed flow rate is a standard vapor volumetric flow rate.
Appendix D: Key Parameters for the Acid Gas Removal System
2.D
Table 2.D.1 Acid gas removal column parameters.
| Column | Feed flow rate (MMSCFD) | T (°F) | P (psig) | Number of trays |
| Contactor | 150 | 100–110 | 796–800 | 7 |
| Regenerator | 150.18 | 210 | 8–12 | 10 |
Feed flow rate is a standard vapor volumetric flow rate.
Table 2.D.2 Makeup composition.
| Stream | Water (mass%) | MDEA (mass%) | Piperazine (mass%) |
| 18 – Makeup | 55 | 40 | 5.0 |
Table 2.D.3 Key heat exchange equipment outlet temperatures.
| Stream | T (°F) |
| 8 | 210 |
| 22 | 110 a |
a Set at 10 °F warmer than inlet gas.
Abbreviations
| AFC | annualized fixed cost (depreciation) |
| AOC | annual operating cost |
| Btu | British thermal unit |
| CO2 | carbon dioxide |
|
|
purchased cost of equipment q |
| FCI | fixed capital investment |
| FCIi | fixed capital investment for a given processing unit |
| FCIS | salvage value of the fixed capital investment |
| ΔFLmix | average explosiveness of a mixture |
|
|
Hand factor for equipment q |
| gal | gallons |
| GJ | gigajoules |
| h | hours |
| H2S | hydrogen sulfide |
| HA | high acid |
| HVm | average mass heating value |
| IROI | incremental return on investment |
| kWh | kilowatt hours |
| lb | pounds |
| LFLmix | lower flammability level of a mixture |
|
|
mass flow rate |
| MDEA | methyl diethanolamine |
| MM$ | million dollars |
| MMBtu | million British thermal units |
| MMSCFD | million standard cubic feet per day |
| MSCF | thousand standard cubic feet |
| N | plant lifetime (number of years) |
