Air Products' PRISM Biogas Upgrading Membrane Separators Biogas Purification Membrane

PRISM membrane separators for biogas upgrading contain thousands of tiny hollow fibers. Smaller gas molecules, like carbon dioxide and water vapor, diffuse through the membrane walls while the larger methane molecules are transported the length of the tube and exit from the end of the module.

In the process of upgrading biogas to high purity biomethane, balancing the relationship among purification efficiency, operational energy consumption, and investment costs has always been a challenge for the industry. PRISM^® Biogas Upgrading Membrane Separators break this "impossible trinity" through exceptional modular design and highly flexible customization capabilities. By precisely selecting different membrane separators based on specific project scales, raw gas compositions, and target product gas standards, PRISM^® enables a diverse range of solutions from "single-focus excellence" to "comprehensive balance."

This combination maximizes the removal of impurities like carbon dioxide and hydrogen sulfide, ensuring the methane concentration in the product methane purity up to 99.8%, while minimizing methane loss and achieving maximum resource utilization.

Power = 0.22 kW/Nm³/hr raw biogas

For projects sensitive to operating costs or with limited power resources, the low-power advantage of PRISM^® membranes becomes prominent. By optimizing the arrangement and combination of membrane modules and inlet biogas flow rate, the load on compressors and refrigeration equipment is significantly reduced.

Power = 0.15 kW/Nm³/hr raw biogas

For budget-conscious projects with sensitive payback periods, the PRISM^® membrane system offers highly cost-effective standardized or simplified 2-stage purification configurations. While ensuring basic purification effects, this approach streamlines post-treatment steps, significantly reducing initial equipment investment. 

Power = 0.17 kW/Nm³/hr raw biogas