Diselenide Membrane for Carbon Capture Research
Official patent title
Polyimide membranes incorporating diselenide functionality for selective separation of CO2
Arabic title: أغشية بوليميد تدمج وظيفة ثنائي السيلينيد للفصل الانتقائي لغاز CO2
Invention
Invention
Problem
Industrial carbon-dioxide separation needs membrane materials that can adsorb CO2 selectively while remaining practical to synthesize, cast, and integrate into a treatment process.
Why it matters
Selective CO2 capture can support purification of industrial gas streams and provide a separated feed for storage, conversion, or further processing.
Approach
The patent discloses polyimide membranes containing diselenide-linked structures, methods for synthesizing and casting those polymers, and a method of contacting the membrane with CO2 for adsorption.
Who may benefit
Potential beneficiaries include membrane manufacturers, industrial-gas processors, carbon-management developers, power and process-plant research teams, and specialty-polymer producers.
Potential value
The asset combines a diselenide-functional polyimide chemistry with defined polymerization and membrane-casting routes, providing a focused material platform for CO2 adsorption studies.
Background
Background
CO2 capture from power and industrial sources is studied as a way to separate carbon dioxide before storage or conversion. Conventional separation processes can require substantial energy or repeated sorbent regeneration, while membrane approaches offer a compact alternative but must balance permeability, selectivity, stability, and manufacturability. The patent focuses on polyimides because their backbone chemistry can be tailored. It introduces diselenide diamines and selected dianhydrides to form multifunctional polyimides intended to adsorb CO2 after being processed into membranes.
Technology overview
Technology overview
Diselenide diamines are reacted with pyromellitic dianhydride or 3,4,9,10-perylenetetracarboxylic dianhydride at a 1:1 molar ratio. A polyamic-acid intermediate is stirred under argon and heated at 180–190 °C for at least nine hours to form the polyimide. Membranes are cast from a 20 wt.% polyimide solution in 5 mL DMF on glass, then heated progressively at about 60, 100, and 150 °C. The claimed polymer structures have n values from 2 to 100 and are configured for CO2 adsorption.
Potential applications
Potential applications
- Potential use in membrane-based CO2 capture from industrial gas streams.
- Potential use in gas-purification research before carbon storage or conversion.
- Potential use as a test platform for selective polyimide adsorbent membranes.
- Potential integration into laboratory modules for comparing CO2-separation materials.
Evidence-supported advantages
Evidence-supported advantages
- Introduces diselenide functionality directly into the polyimide structures.
- Provides several diamine and dianhydride combinations for material optimization.
- Defines polymerization, precipitation, casting, and staged-heating conditions.
- Claims both the membrane composition and a CO2-contact adsorption method.
Development stage
Development stage
Patent publication describing polymer synthesis and membrane casting; commercialization and independent CO2-separation performance validation were not established.
Commercial opportunity
Commercial opportunity
The membrane chemistry may support licensing or collaborative evaluation with gas-separation, carbon-management, or specialty-polymer companies. Development should establish CO2 capacity and selectivity against relevant gas mixtures, permeability, mechanical integrity, thermal and chemical life, selenium handling, solvent recovery, membrane-module fabrication, regeneration, and scale-up economics.
Patent classifications
Patent classifications
WIPO IPC
- B01J20/26Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01D53/02Separation
CPC
- B01D53/02Separation
- B01D53/228Separation
- B01J20/262Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/28033Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/3007Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- B01J20/3085Chemical or physical processes, e.g. catalysis or colloid chemistry; their relevant apparatus
- C08G73/1028Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C08G73/1057Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C08G73/1082Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C08J5/18Working-up; general compounding processes; after-treatment of macromolecular compounds
- B01D2253/202Separation
- B01D2257/504Separation
- C08J2379/08Working-up; general compounding processes; after-treatment of macromolecular compounds
Inventors
Inventors
- First inventorTarek Ahmed Yousef
- InventorSaad Shaaban
- InventorFaisal Khuwayshan L Algethami
Keywords
Keywords
- polyimide membrane
- diselenide
- CO2 adsorption
- carbon capture
- gas separation
- DMF casting
- specialty polymer
Patent document and drawings
Patent document and drawings
The patent publication is mapped to this record. Patent drawings remain within that publication; no separately cleared public media package has been supplied.