Methane concentration technology – gas

1. Product Overview

This system is designed for the treatment and concentration of oxygen-containing low-concentration coalbed methane. It adopts a micro-pressure Pressure Swing Adsorption (PSA) process to selectively separate methane (CH₄) from nitrogen (N₂) and oxygen (O₂).

Compared with conventional methods such as membrane separation, deoxygenation, and direct liquefaction, this system focuses on low-energy, low-pressure methane enrichment.

Developed by Chengdu Huaxi Chemical Technology Co., Ltd., the system is suitable for industrial-scale coalbed methane utilization and energy recovery.

2. Process Description

• Feed gas: Oxygen-containing coalbed methane

• Methane content range: 10–15% (typical), up to 30% applicable

• Separation method: Micro-pressure PSA / Vacuum PSA optional

• Output: Enriched methane gas for combustion or further upgrading

Process function:

• One-stage concentration: ≥30% CH₄ for power generation fuel use

• Two-stage concentration: Upgraded to natural gas quality

3. Equipment Capacity

• Standard capacity range: 2,000 – 30,000 Nm³/h

• Operating mode: Continuous or flexible load operation

4. Technical Features

4.1 Low Energy Consumption Operation

• No high-pressure feed compression required

• Low-pressure PSA operation reduces overall power consumption

• Improved system safety due to reduced pressure risk

4.2 Adjustable Gas Purity Output

• Methane concentration can be adjusted based on process requirements

• Supports different end-use scenarios:

• Boiler / combustion fuel gas

• Power generation fuel

• Pipeline-grade upgrading feed gas

4.3 Strong Feed Gas Adaptability

• Applicable methane concentration range: 10% – 30% CH₄

• Operating pressure: approximately 20 kPa (gauge pressure)

• Supports vacuum PSA configuration for low-pressure gas sources

4.4 Wide Operating Range

• Stable operation range: 30% – 110% load flexibility

• Suitable for fluctuating coalbed methane production conditions

5. Application Scope

• Oxygen-containing coalbed methane systems (CH₄ ≥ 10%)

• Coal mine gas utilization projects

• Low-concentration methane recovery and energy conversion systems

• Industrial fuel gas upgrading systems

6. Output Gas Usage

• Industrial boiler fuel

• Gas turbine / power generation fuel

• Further natural gas upgrading feedstock

• Distributed energy systems

7. Manufacturer

Chengdu Huaxi Chemical Technology Co., Ltd.

Specialized in low-concentration methane separation, PSA gas purification systems, and coalbed methane utilization technologies.

Process Diagram

Typical Performance