CO₂ Capture & Utilization

CO₂ produced during natural gas acid gas removal should not be vented. We compress, dry, and liquefy it to produce industrial or food-grade liquid CO₂ (LCO₂), or inject it at elevated pressure into oil reservoirs for enhanced oil recovery (CO₂-EOR), enabling resource utilization.

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Product & Technical Features

CO₂ Compression
- Screw or oil-free piston compressors raise CO₂ pressure to 2.0–3.0 MPaG to meet liquefaction conditions
Refining
- Molecular sieve drying (H₂O < 10 ppm) + activated carbon adsorption, followed by distillation to remove non-condensables; product purity up to 99.9%
Liquefaction & Storage
- Refrigeration system condenses CO₂ into liquid stored in −30°C cryogenic pressure vessels for transport and sales
EOR Injection
- CO₂ compressed to supercritical state (> 6 MPa) and injected via gas injection wells into reservoir formations to enhance oil recovery

Core Advantages

Product Route	Key Specification	Main Application
Industrial/Food-grade LCO₂	Purity > 99.9%, H₂O < 10 ppm	Food & beverage, welding shielding, dry ice
CO₂-EOR	Injection pressure > 6 MPa	Enhanced oil recovery, carbon emission reduction
Comprehensive CO₂ utilization	Recovery rate > 85%	Waste-to-value, improved project economics

Key Applications

We undertake CO₂ capture and utilization projects for natural gas processing plants and ammonia plants, including LCO₂ production units and CO₂-EOR injection systems design and supply.