1. Effect of Different Oxygen-Containing Groups on the Nanopore Diameter of Hyper-Crosslinked Resins for Gas Adsorption/Separation.
- Author
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Wang, Chuanhong, Chen, Xuefang, Yao, Shimiao, Peng, Fen, Xiong, Lian, Guo, Haijun, Zhang, Hairong, and Chen, Xinde
- Abstract
Few studies have been conducted on the effect of nonamine groups on the nanopore environment and gas adsorption/separation ability of normal spherical hyper-crosslinked resins. Here, hyper-crosslinked resins (HCP@COOH and HCP@CO), modified with a COOH-containing structure (A) and a CO-containing structure (B), were synthesized by the Friedel–Crafts acylation reaction. According to static adsorption and dynamic separation tests, different oxygen-containing groups have different impacts on the nanopore diameter and small gas adsorption/separation behavior. Structure (A), benefiting from its suitable nanoscale size, was verified to be effective in narrowing the size of nanopores to 1–2 nm and increasing the adsorption capacity of CO
2 , CH4 , and CO, while Structure (B) seems to have a positive influence only on CH4 . The uptake of CO2 and the separation ratio of CO2 /CO in HCP@COOH reach 32 cm3 /g and 12.2, respectively, at 298 K and 1 bar. The IAST selectivity of CH4 /CO in HCP@O-1 is up to 3.4, increasing from 1.9 for HCP-1. HCP@COOH can separate syngas efficiently at ambient temperature and can be regenerated by simple vacuum operation. The interaction mechanism was also analyzed by experiments and electrostatic potential simulation. [ABSTRACT FROM AUTHOR]- Published
- 2024
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