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Updated: May 14, 2026
08:00
A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica Composites for Carbon Capture
Published on: September 29, 2023
Post-Synthetic Modification of Dibromomethane Knitted Hyper-Cross-Linked Polymers With Sulfonic and Nitro Groups for
Yahya Alemin1,2,3, Jiarui Hu1,2,3, Peixuan Xie1,2,3
1Key Laboratory of Material Chemistry For Energy Conversion and Storage, Ministry of Education, Wuhan, China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|May 12, 2026
Summary
This study enhances carbon dioxide (CO2) capture using functionalized porous polymers. Post-synthetic sulfonation and nitration improve CO2 adsorption capacity and CO2/N2 selectivity for post-combustion applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Efficient carbon dioxide (CO2) capture is vital for mitigating post-combustion emissions.
- Porous polymers offer potential for CO2 capture but face trade-offs between capacity and selectivity.
Purpose of the Study:
- To develop a porous polymer with enhanced CO2 adsorption capacity and CO2/N2 selectivity.
- To investigate the impact of post-synthetic functionalization on polymer performance for CO2 capture.
Main Methods:
- Synthesis of a hyper-cross-linked polymer (HCP-TPB) using triphenylbenzene (TPB) and dibromomethane.
- Post-synthetic functionalization of HCP-TPB via sulfonation and nitration.
- Characterization of textural properties and gas adsorption performance (CO2, N2).
Main Results:
- HCP-TPB exhibited high surface area (2738 m2 g-1) and CO2 uptake (21.3 wt%).
- Sulfonated (HCP-TPB-SO3H) and nitrated (HCP-TPB-NO2) polymers showed increased CO2 capacity (23.7 wt% and 23.3 wt%) and significantly enhanced CO2/N2 selectivity (32 and 42, respectively).
- IAST-predicted selectivity for CO2/N2 mixtures also improved after functionalization.
Conclusions:
- Post-synthetic sulfonation and nitration effectively overcome the capacity-selectivity trade-off in porous polymers.
- Functionalized porous polymers demonstrate promising performance for selective CO2 capture in post-combustion applications.
- Established a clear structure-property relationship between functional groups and gas separation performance.
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