Typical operating conditions and utility requirements for various gas processing units.
| Property | MEA | DEA | MDEA | DGA |
|---|---|---|---|---|
| MW | 61.08 | 105.14 | 119.16 | 105.14 |
| Typical Strength (wt%) | 15-20 | 25-35 | 40-50 | 50-60 |
| Max Loading (mol/mol) | 0.30-0.35 | 0.35-0.40 | 0.40-0.55 | 0.35-0.40 |
| Regen Temp (°F) | 240-250 | 240-250 | 240-260 | 310-320 |
| Heat of Reaction (Btu/lb) | 825 | 650 | 500 | 550 |
| Relative Solvent Rate | 1.0 | 0.8 | 0.6 | 0.5 |
| CO₂ Selectivity | None | Slight | High | None |
| Degradation Temp (°F) | 250 | 250 | 260 | 320 |
| Amine Type | Pure Amine (gal/lb acid gas) | Mixed Solvents (gal/lb acid gas) |
|---|---|---|
| MEA (20%) | 3.0-4.0 | 2.5-3.5 |
| DEA (35%) | 2.0-2.8 | 1.8-2.5 |
| MDEA (50%) | 1.5-2.2 | 1.3-2.0 |
| DGA (60%) | 1.2-1.8 | 1.0-1.5 |
| MDEA + Piperazine | - | 1.0-1.5 |
| Formulated MDEA | - | 1.2-1.8 |
| Property | MEG | DEG | TEG | TREG |
|---|---|---|---|---|
| MW | 62.1 | 106.1 | 150.2 | 194.2 |
| Boiling Pt @ 760 mmHg (°F) | 387 | 475 | 546 | 610 |
| Boiling Pt @ 50 mmHg (°F) | 266 | 345 | 404 | 460 |
| Freezing Pt (°F) | 8 | -18 | 19 | 7 |
| Viscosity @ 77°F (cP) | 16.5 | 28.2 | 37.3 | 44.6 |
| Decomp. Temp (°F) | 329 | 328 | 404 | 446 |
| Vapor Pressure @ 77°F (mmHg) | 0.12 | 0.002 | <0.001 | <0.001 |
| Typical Regen Conc (wt%) | 95-98 | 97-98.5 | 98.5-99.9 | 99+ |
| TEG Conc (wt%) | Water Dewpoint @ 100°F Contact (°F) | lb H₂O/MMscf |
|---|---|---|
| 98.0 | 24 | 11.8 |
| 98.5 | 19 | 9.3 |
| 99.0 | 13 | 6.9 |
| 99.5 | 4 | 4.5 |
| 99.9 | -10 | 2.1 |
| 99.95 | -20 | 1.2 |
| 99.98 | -30 | 0.7 |
| Process | Pressure (psig) | Temperature (°F) | Key Parameters |
|---|---|---|---|
| Inlet Separation | 600-1200 | 60-100 | Retention: 1-3 min |
| Amine Treating | 200-1000 | 90-120 | L/G: 2-5 gal/MMscf |
| Glycol Dehydration | 500-1500 | 80-110 | TEG: 2-4 gal/lb H₂O |
| Molecular Sieve | 400-1000 | 70-100 | Cycle: 8-24 hours |
| JT Plant | 800-1200 | -20 to 20 | ΔP: 400-800 psi |
| Refrigeration | 600-900 | -20 to 35 | Propane levels |
| Turbo-Expander | 600-1000 | -100 to -150 | Efficiency: 80-85% |
| Stabilization | 50-300 | 200-400 | RVP: 10-12 psia |
| Fractionation | 100-400 | 100-450 | Product specs |
| Claus Unit | 15-20 | 2000-2800 | H₂S > 20% |
| Storage | 0-250 | Ambient | Product dependent |
| Process | Steam | Cooling | Power | Fuel |
|---|---|---|---|---|
| Amine Unit | 0.8-1.2 lb/gal | 80-120 MBtu/MMscfd | 5-10 kW/MMscfd | Minimal |
| Glycol Unit | N/A | 20-40 MBtu/MMscfd | 2-5 kW/MMscfd | 1-2 MBtu/MMscfd |
| Refrigeration | N/A | 200-400 MBtu/MMscfd | 50-100 kW/MMscfd | Minimal |
| Expander Plant | N/A | 100-200 MBtu/MMscfd | -20 to -50 kW/MMscfd | Minimal |
| Stabilizer | 50-100 lb/bbl | 20-40 MBtu/bbl | 0.5-1 kW/bbl | 0.5-1 MBtu/bbl |
| Fractionation | 30-60 lb/bbl | 30-60 MBtu/bbl | 0.5-1.5 kW/bbl | Varies |
| Compression | N/A | 2-5 MBtu/hp | 0.7-0.8 kW/hp | If gas engine |