Polymeric substrates and methods of making and using thereof
PES substrates with highly interconnected pores address the mass transfer and lateral diffusion resistance issues in composite membranes, enhancing CO2 separation efficiency in flue gas applications.
WO2025064987A9PCT designated stage expired Publication Date: 2026-07-09OHIO STATE INNOVATION FOUND
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- OHIO STATE INNOVATION FOUND
- Filing Date
- 2024-09-23
- Publication Date
- 2026-07-09
AI Technical Summary
Technical Problem
Existing composite membranes for gas separation, such as CO2 separation from flue gas, face challenges due to high mass transfer resistance and lateral diffusion resistance, which can be improved by using substrates with highly interconnected pores to enhance gas transport characteristics.
Method used
The development of polyethersulfone (PES) substrates with highly interconnected pores, prepared through methods involving phase separation and solvent removal, which are used as support layers in composite membranes for gas separation.
Benefits of technology
The PES substrates with highly interconnected pores result in improved gas permeance, specifically CO2 permeance, making them effective for CO2 separation from flue gas in coal- and natural gas-fired power plants.
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Abstract
Porous polymer membranes, methods of making porous polymer membranes, and methods of using the membranes are described herein. Generally, composite membranes used for gas separation include a dense top layer responsible for gas separation and a porous substrate layer that provides mechanical support. Although the major separation is achieved by the selective top layer, the pore structure of the substrate has a significant effect on the gas transport performance of the composite membrane
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