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Recovery of Aluminum and Preparation of Porous Carbon from Tetra Pak Waste
Author(s) -
Huo Hanxin,
Ma Yuhui,
Wang Xunliang
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202004624
Subject(s) - char , carbonization , pyrolytic carbon , pyrolysis , materials science , adsorption , porosity , chemical engineering , carbon fibers , activated carbon , specific surface area , langmuir , polymerization , sorbent , langmuir adsorption model , nuclear chemistry , organic chemistry , chemistry , composite material , polymer , catalysis , composite number , engineering
Pyrolysis of paper and polyethylene in Tetra Pak waste occurred at 368 and 490 °C, respectively, while aluminum did not melted until the temperature reached 660 °C, thus aluminum and char can be obtained by carbonization of Tetra Pak waste at 550 °C. Pyrolytic char was processed into porous carbons by different methods. Specific surface area of the porous carbon prepared by carbonization of acid‐washed char at 850 °C achieved 741 m 2 g −1 , and the specific surface area of the porous carbon prepared from char by successively carbonization at 850 °C and acid‐washing was 732 m 2 g −1 . The developed porous structure was formed due to the polymerization of char above 650 °C, while the etching of char by CO 2 generated via decomposition of inherent calcite led to a lower microporosity. Methylene blue adsorption capacity of the optimized sample reached 140 mg g −1 , and the equilibrium data followed Langmuir model.