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Effects of Carbonization Conditions on Structure and Gas Adsorption of Carbon Membranes Derived from Polyvinyl Chloride
Author(s) -
Xu Beiyu,
Zhao Xinpeng,
Chen Hao,
Su Shengpei,
Yu Haibin
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201903637
Subject(s) - carbonization , polyvinyl chloride , adsorption , membrane , pyrolysis , carbon fibers , chemical engineering , fourier transform infrared spectroscopy , chemistry , chloride , materials science , activated carbon , inorganic chemistry , organic chemistry , composite material , biochemistry , composite number , engineering
Carbon membranes were fabricated through the pre‐oxidation and pyrolysis of polyvinyl chloride (PVC). Their chemical composition and structure morphology were characterized using FTIR, SEM and XRD; their CO 2 and N 2 adsorption isotherms were measured at 25 °C. The experimental results showed that heating rate and holding time have great influences on the pore structure during the pre‐oxidation process as well as the carbonization process. The pore structure of the carbon membrane is also influenced by carbonization temperature. The carbon membrane obtained at 700 °C has the largest CO 2 adsorption capacity of 1.45 mmol/g at 101 kPa. The carbon membrane prepared at heating rate of 3 °C/min and holding time of 0.5 h at 800 °C displayed an excellent adsorption selectivity of CO 2 over N 2 evidenced by the fact that its CO 2 adsorption capacity could reach 1.1 mmol/g and while it does not significantly adsorb N 2 .