An Aromatic Fluoropolymer for Hydrogen Separation from Hydrocarbons. Issue 6 (22nd January 2022)

• Record Type: Journal Article
• Authors: Guan, Jian; Lu, Yanqiu; Du, Lijun; Liang, Canzeng; Wu, Ji; Li, Dongfei; Zhang, Sui
• Is Part Of: Macromolecular rapid communications. Volume 43:Issue 6(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-22
• Subjects: fluoropolymers -- hydrocarbons -- hydrogen separation -- membranes -- plasticization; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.202100796
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract: Plasticization is a critical challenge in membrane‐based gas separation. Here a novel fluoropolymer, poly(trifluoro styrene) (PTFS), is reported for hydrogen separation from hydrocarbons. The polymer structure is first characterized by different techniques such as nuclear magnetic resonance (NMR) and positron annihilation lifetime spectroscopy (PALS). Then, gas separation performances of the polymer are studied. The separation of H2 /CH4 is found to outperform most other fluorinated polymers and surpass the Robeson 1991 upper bound. Furthermore, the polymer demonstrates stable or increasing selectivity for hydrogen over hydrocarbons (e.g., CH4, C2 H6, and C3 H8 ) at higher pressure, suggesting excellent resistance to plasticization. Abstract : The aromatic fluoropolymer, poly(trifluoro styrene), shows H2 permeability of barrer, a H2 /CH4 selectivity of 52.4, and good resistance to hydrocarbons.