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Published on: February 12, 2019
Precise Construction of Nitrogen-Enriched Porous Ionic Polymers as Highly Efficient Sulfur Dioxide Adsorbent
Sen Chen1,2, Shicheng Huang1, Zhenglu Yang1,2
1Engineering Research Center of Functional Materials Intelligent Manufacturing of Zhejiang Province, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310012, China.
A new nitrogen-rich porous ionic polymer efficiently removes low-concentration sulfur dioxide (SO2). This material demonstrates high SO2 selectivity and adsorption capacity, offering a promising solution for gas separation challenges.
Area of Science:
- Materials Science
- Polymer Chemistry
- Environmental Engineering
Background:
- Porous ionic polymers show promise in various applications.
- Fabricating functional polymers for efficient low-concentration sulfur dioxide (SO2) removal is challenging.
Purpose of the Study:
- To develop a novel nitrogen-enriched porous ionic polymer (NH2Py-PIP) for efficient SO2 removal.
- To investigate the structure-property relationship for enhanced SO2 adsorption and separation.
Main Methods:
- Synthesized a novel nitrogen-enriched porous ionic polymer (NH2Py-PIP) using a tailored nitrogen-functionalized cross-linker (NH2Py).
- Characterized the polymer's nitrogen content, ionic sites, and hierarchical porous structure.
- Evaluated SO2 adsorption capacity, SO2/CO2 selectivity, and dynamic separation performance.
- Utilized modeling studies to understand the SO2 adsorption mechanism.
Main Results:
- NH2Py-PIP exhibits high nitrogen content (15.9 wt.%) and ionic sites (1.22 mmol g-1).
- Achieved excellent SO2/CO2 selectivity (1165) and high SO2 adsorption capacity (1.13 mmol g-1 at 0.002 bar).
- Demonstrated highly efficient and reversible dynamic separation performance.
- Modeling revealed collaborative promotion of SO2 adsorption by nitrogen sites and bromide anions.
Conclusions:
- The novel NH2Py-PIP offers a promising platform for high-efficiency SO2 separation.
- The tailored design approach provides insights for creating functional porous materials.
- This work advances the development of advanced materials for environmental applications.
