Hollow fibers and processes for the production of hollow fibers

The hollow fiber manufacturing process with a semi-permeable lumen coating addresses incomplete amination in existing technologies, achieving efficient carbon dioxide capture by functionalizing fillers and using a semi-permeable layer, enhancing capture efficiency and versatility.

WO2026114990A2 Publication Date: 2026-06-04NEOCARBON GMBH
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Patent Information

Application Number
PCT/EP2025/084435
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2025-04-11
Filing Date
2025-11-26
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing hollow fiber technologies for carbon capture lack tunable amination conditions, resulting in incomplete amination of the shell and inefficient carbon dioxide capture, and are limited to specific polymer types like polyimides.

Method used

A process for manufacturing hollow fibers with a semi-permeable lumen coating that includes functionalizing fillers with nucleophilic groups and extruding a dope mixture through a spinneret, followed by lumen coating with a semi-permeable layer impermeable to liquid heat transfer media but permeable to vapor, using materials like polyetherimide and fillers such as metal organic frameworks or zeolites.

Benefits of technology

The process enables complete amination throughout the hollow fiber shell, enhancing carbon dioxide capture efficiency and versatility across various polymer types, including polyetherimide and fillers, with improved stability and vapor permeability.

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Abstract

The present invention relates to hollow fibers and processes for the production of hollow fibers. The present invention also relates to carbon capture using the hollow fibers. In one aspect, we describe a HF for capturing carbon dioxide. The HF comprises a hollow fiber structure capable of carbon dioxide capture; and a semi-permeable layer coating an inside of a lumen disposed within the hollow fiber structure. We also describe a process for manufacturing a HF for capturing carbon dioxide. The process comprises extruding a dope mixture through a spinneret to form a hollow fiber structure; and coating an inside of a lumen of the hollow fiber structure with a semi-permeable layer. The semi-permeable layer comprises a material that is impermeable to a liquid heat transfer medium but permeable to a vapor state of the heat flow transfer medium.
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