Consulting of Purification of gases

1. Tail Gas Plant for Biogas to Produce Food Grade CO2 and Pure Methane

Process Overview:

• Biogas Composition: Typically contains CH₄ (50-60%) and CO₂ (30-40%) along with impurities.

• Separation Process:

  • CO₂ Capture: Chemical absorption (amines) or membrane separation.

  • CH₄ Purification: PSA (Pressure Swing Adsorption) or cryogenic separation.

Key Equipment:

• Gas Compressors

• Absorption Columns

• Membrane Modules

• PSA or Cryogenic Distillation Unit

2. Gasoline Vapor Recovery Unit (VRU) for Truck and Railway Terminals

Process Overview:

• Purpose: Recover volatile organic compounds (VOCs) from gasoline storage and transfer operations.

Recovery Methods:

• Absorption (Activated Carbon or Oil)

• Condensation (Chilled Recovery)

• Membrane Separation

Key Equipment:

• Activated Carbon Adsorbers

• Refrigeration Units

• Condensers

• Compressors

3. Dehydration Unit for Gases (Refrigeration & Desiccant Drying)

Process Overview:

• Purpose: Remove moisture from gases such as Natural Gas, Biogas, Tail Gas, and Hydrogen.

Methods:

• Refrigeration Drying (Cooling and condensation)

• Desiccant Drying (Silica gel, Molecular Sieves)

Key Equipment:

• Chillers & Heat Exchangers

• Moisture Separators

• Adsorption Columns

• Regeneration Heaters

4. Deoxo System and Dehydration for Hydrogen Purification

Process Overview:

• Purpose: Remove oxygen and moisture from Hydrogen.

Process:

• Catalytic Deoxidation (Palladium or Platinum catalyst)

• Dehydration via Molecular Sieves or PSA

Key Equipment:

• Deoxo Reactors

• PSA Units

• Molecular Sieve Beds

5. Deoxo System and Dehydration for Nitrogen Purification

Process Overview:

• Purpose: Remove oxygen and moisture from Nitrogen gas.

Process:

• Catalytic Oxidation (Hydrogen dosing with catalyst)

• Moisture Removal using Drying Units

Key Equipment:

• Deoxo Catalytic Reactors

• PSA Units

• Drying Columns

6. H₂S Removal from Biogas, Tail Gas, and Natural Gas

Process Overview:

• Purpose: Remove hydrogen sulfide (H₂S) to prevent corrosion and environmental hazards.

Common Methods:

• Absorption (Iron Sponge, Amine Treatment)

• Adsorption (Activated Carbon, Molecular Sieves)

• Biological Treatment

Key Equipment:

• Absorbers & Scrubbers

• Catalytic Reactors

• Regeneration Units

7. Cryogenic Distillation for Gas Purification Process Overview:

• Purpose: Separate gases based on their boiling points (e.g., Oxygen, Nitrogen, Argon, etc.).

Process:

• Gas cooling to cryogenic temperatures.

• Fractional distillation under high pressure.

Key Equipment:

• Cryogenic Heat Exchangers

• Distillation Columns

• Compressors & Expanders

8. Recovery and Removal of VOCs

Process Overview:

• Purpose: Capture and remove volatile organic compounds from industrial emissions.

Methods:

• Adsorption (Activated Carbon)

• Condensation (Cryogenic Cooling)

• Oxidation (Thermal or Catalytic)

Key Equipment:

• Adsorption Towers

• Refrigeration Compressors

• Oxidation Chambers

9. COS Removal from Biogas, Tail Gas, and Natural Gas:

• Purpose: Remove Carbonyl Sulfide (COS) to prevent catalyst poisoning and corrosion.