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XC-1
XICHENG
Purpose: Removes acidic contaminants (H₂S, CO₂, SO₂, HCl) from industrial gas streams in oil/gas, biogas, and waste-to-energy plants.
| Type | Amine Used | Target Gases | Efficiency | Pros & Cons |
|---|---|---|---|---|
| MEA (Monoethanolamine) | 15-20% aqueous solution | CO₂, H₂S | >90% CO₂ removal | ✅ High efficiency ❌ High energy regeneration |
| DEA (Diethanolamine) | 20-30% solution | CO₂, H₂S | 85-95% | ✅ Less corrosive ❌ Lower H₂S selectivity |
| MDEA (Methyldiethanolamine) | 30-50% solution | Selective H₂S | >95% H₂S (low CO₂ co-absorption) | ✅ Energy-efficient ❌ Slower reaction |
Process Flow:
Absorption: Acid gases dissolve in amine solution (40-60°C).
Regeneration: Rich amine heated (100-120°C) to release acid gases.
Recycling: Lean amine reused.
Applications:
Natural gas sweetening
Biogas upgrading (CO₂ removal)
Refinery gas treatment
| Reagent | Reaction | Efficiency | Waste Byproduct |
|---|---|---|---|
| NaOH | SO₂ + 2NaOH → Na₂SO₃ + H₂O | >99% | Na₂SO₃ (reusable) |
| Ca(OH)₂ | 2HCl + Ca(OH)₂ → CaCl₂ + 2H₂O | 95-98% | CaCl₂ sludge |
Design Types:
Packed Tower: High efficiency, large footprint.
Venturi Scrubber: Compact, handles particulates.
Applications:
Waste incineration flue gas
Chemical manufacturing exhaust
| Solvent | Target Gases | Pressure | Temp |
|---|---|---|---|
| Selexol (DMPEG) | CO₂, H₂S | High (20-70 bar) | -10°C to 50°C |
| Rectisol (Methanol) | CO₂, H₂S, COS | Cryogenic (-30°C) | High purity |
Advantages:
Low energy consumption (no heating for regeneration).
Selective H₂S removal.
Applications:
Syngas purification
LNG production
Process:
Thiobacillus bacteria oxidize H₂S → Sulfur/water.
Efficiency: 99% at low costs.
Systems:
Biofilter (packed bed with microbes).
Bioscrubber (liquid-phase bioreactor).
Pros:
✅ No chemicals
✅ Low OPEX
| Parameter | Amine Scrubbing | Caustic Scrubbing | Physical Solvents | Biological |
|---|---|---|---|---|
| CapEx | High | Medium | Very High | Low |
| OpEx | High (energy) | Medium (chemicals) | Low | Very Low |
| Footprint | Large | Medium | Compact | Large |
| Best For | High-purity gas | Acidic flue gases | High-pressure gas | Biogas |
Amine units: Stainless steel 316L (resists amine corrosion).
Caustic scrubbers: PP/FRP (for HCl/SO₂).
Heat integration: Reuse regeneration heat.
Hybrid systems: Amine + membrane for CO₂ capture.
Amine waste: Reclaim or incinerate.
Caustic sludge: Neutralize before disposal.
Phase-change solvents: Reduce regeneration energy by 40%.
Membrane hybrids: Lower footprint for offshore platforms.
AI monitoring: Predictive amine degradation control.
Choose amine scrubbing for high-purity H₂S/CO₂ removal, caustic scrubbers for acidic flue gases, and biological systems for biogas. For Vietnam’s oil/gas and WTE sectors, UOP’s AmineGuard and Evoqua’s bioscrubbers offer cost-effective compliance with environmental regulations.
Purpose: Removes acidic contaminants (H₂S, CO₂, SO₂, HCl) from industrial gas streams in oil/gas, biogas, and waste-to-energy plants.
| Type | Amine Used | Target Gases | Efficiency | Pros & Cons |
|---|---|---|---|---|
| MEA (Monoethanolamine) | 15-20% aqueous solution | CO₂, H₂S | >90% CO₂ removal | ✅ High efficiency ❌ High energy regeneration |
| DEA (Diethanolamine) | 20-30% solution | CO₂, H₂S | 85-95% | ✅ Less corrosive ❌ Lower H₂S selectivity |
| MDEA (Methyldiethanolamine) | 30-50% solution | Selective H₂S | >95% H₂S (low CO₂ co-absorption) | ✅ Energy-efficient ❌ Slower reaction |
Process Flow:
Absorption: Acid gases dissolve in amine solution (40-60°C).
Regeneration: Rich amine heated (100-120°C) to release acid gases.
Recycling: Lean amine reused.
Applications:
Natural gas sweetening
Biogas upgrading (CO₂ removal)
Refinery gas treatment
| Reagent | Reaction | Efficiency | Waste Byproduct |
|---|---|---|---|
| NaOH | SO₂ + 2NaOH → Na₂SO₃ + H₂O | >99% | Na₂SO₃ (reusable) |
| Ca(OH)₂ | 2HCl + Ca(OH)₂ → CaCl₂ + 2H₂O | 95-98% | CaCl₂ sludge |
Design Types:
Packed Tower: High efficiency, large footprint.
Venturi Scrubber: Compact, handles particulates.
Applications:
Waste incineration flue gas
Chemical manufacturing exhaust
| Solvent | Target Gases | Pressure | Temp |
|---|---|---|---|
| Selexol (DMPEG) | CO₂, H₂S | High (20-70 bar) | -10°C to 50°C |
| Rectisol (Methanol) | CO₂, H₂S, COS | Cryogenic (-30°C) | High purity |
Advantages:
Low energy consumption (no heating for regeneration).
Selective H₂S removal.
Applications:
Syngas purification
LNG production
Process:
Thiobacillus bacteria oxidize H₂S → Sulfur/water.
Efficiency: 99% at low costs.
Systems:
Biofilter (packed bed with microbes).
Bioscrubber (liquid-phase bioreactor).
Pros:
✅ No chemicals
✅ Low OPEX
| Parameter | Amine Scrubbing | Caustic Scrubbing | Physical Solvents | Biological |
|---|---|---|---|---|
| CapEx | High | Medium | Very High | Low |
| OpEx | High (energy) | Medium (chemicals) | Low | Very Low |
| Footprint | Large | Medium | Compact | Large |
| Best For | High-purity gas | Acidic flue gases | High-pressure gas | Biogas |
Amine units: Stainless steel 316L (resists amine corrosion).
Caustic scrubbers: PP/FRP (for HCl/SO₂).
Heat integration: Reuse regeneration heat.
Hybrid systems: Amine + membrane for CO₂ capture.
Amine waste: Reclaim or incinerate.
Caustic sludge: Neutralize before disposal.
Phase-change solvents: Reduce regeneration energy by 40%.
Membrane hybrids: Lower footprint for offshore platforms.
AI monitoring: Predictive amine degradation control.
Choose amine scrubbing for high-purity H₂S/CO₂ removal, caustic scrubbers for acidic flue gases, and biological systems for biogas. For Vietnam’s oil/gas and WTE sectors, UOP’s AmineGuard and Evoqua’s bioscrubbers offer cost-effective compliance with environmental regulations.
| | N0.34 Zhenxing Road (Shengtaian Heavy Industrial Park B), Loucun, Guangming New Dist, Shenzhen, Guangdong, China |
| | +86 18028775826 |
| | Leyte@china-xicheng.com |