Product Overview
The CO₂ membrane is an advanced gas separation system designed for the efficient separation and recovery of carbon dioxide (CO₂) using selective membrane technology. By exploiting the membrane’s preferential permeability to CO₂, the system achieves precise gas separation in natural gas processing, biogas upgrading, and industrial flue gas treatment. Featuring a compact design, stable operation, low energy consumption, and minimal maintenance, the CO₂ membrane system significantly reduces emissions, enhances resource utilization, and helps industries achieve energy-saving and carbon-reduction goals.
Working Principle
The membrane-based CO₂ separation process relies on differences in gas diffusion and solubility within the membrane material. Under a pressure gradient, CO₂-rich gas enters the membrane module. Because CO₂ molecules diffuse and permeate faster than other gases, they preferentially pass through the membrane, forming a CO₂-enriched permeate stream. The remaining gas on the retentate side becomes CO₂-depleted, yielding purified product gas. This fully physical process operates without phase changes, under mild conditions at near-ambient temperature and pressure, ensuring continuous, energy-efficient, and sustainable operation.
Key Features
l Compact and lightweight equipment with minimal footprint
l Simple process flow, high system reliability, and low maintenance cost
l Flexible configuration to meet diverse CO₂ purity requirements
l High methane purity in the product gas, meeting natural gas quality standards
l Strong CO₂ selectivity and excellent separation efficiency for maximum recovery
l Optional two-stage membrane system combined with cryogenic recovery for CO₂ purity above 99.9%
l Modular design, allowing easy installation, expansion, and integration with other systems
Applications
l Thermal Power Plants: Flue gas CO₂ capture and emission reduction
l Iron and Steel Industry: Purification and recovery of blast furnace gas and tail gases
l Cement Production: CO₂ removal and emission control from process exhaust
l Petrochemical Industry: CO₂ separation and recovery in natural gas and synthesis gas processing
| Project | Coal-fired Power Plant Flue Gas | LNG Flue Gas | Cement Kiln Flue Gas | Petrochemical Flue Gas |
| Process | 2-stage | 3-stage | 3-stage | 3-stage |
| Raw Gas Validation Scale | 110m³/hr | 400m³/hr | 2,000m³/hr | 300m³/hr |
| CO₂ Concentration | 13.6~15% | 4.5~8% | 15~22.6% | 13~14% |
| O₂ Concentration | 0.7~3.4% | 5.5~12.8% | 9.9~14.3% | 4~5% |
| NOx | / | / | 45~54ppm | ~50ppm |
| Dust | 15~22mg/m³ | ~2mg/m³ | Severe | <1mg/m³ |
| CO₂ Concentration (Output) | 83.9~84.2% | 65~84.9% | 85.4~90.4% | 90~95% |
| CO₂ Recovery Rate | 84~86.5% | 69~82% | 71~92% | 80% |
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