Premium
Pore structure and VOCs adsorption characteristics of activated coke powders derived via one‐step rapid pyrolysis activation method
Author(s) -
Fu Jiapeng,
Jin Chunjiang,
Zhang Jingru,
Wang Zhiqiang,
Wang Tao,
Cheng Xingxing,
Ma Chunyuan,
Chen Huimin
Publication year - 2020
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.2503
Subject(s) - adsorption , pyrolysis , benzene , chemistry , fourier transform infrared spectroscopy , scanning electron microscope , activated carbon , ethyl acetate , bet theory , coke , specific surface area , xylene , coal , chemical engineering , organic chemistry , nuclear chemistry , materials science , catalysis , composite material , engineering
Three kinds of activated coke powders (ACPs) were prepared from different coal by a one‐step rapid pyrolysis activation method. Detailed pore structure and surface characteristics of the ACPs were characterized by BET specific surface area test, scanning electron microscope (SEM), and Fourier transform infrared spectrometer (FTIR). Adsorption capacity of ethyl acetate, benzene, and p ‐xylene onto the ACPs was tested. Results demonstrated that the ACPs had well‐developed pore structures, with considerable specific surface area and pore volume. Volatile contents in the feed coal had promotion effect on the fast formation and development of the pore structure. Shengli lignite (SLC) showed the largest specific surface area and pore volume, which reached 351.07 m 2 /g and 0.1698 m 3 /g, separately. Surfaces of ACPs were rich of functional groups as carboxyl, lactone, phenolic hydroxyl (or ether), and carbonyl, the types of which kept relatively constant regardless of the change of the feed coal. ACPs presented good VOCs adsorption performance. With the most micropore structures, SLC sample presented the best adsorption capacity for ethyl acetate, benzene, and p ‐xylene, which is 222.23, 149.87, and 217.63 mg/g, respectively. All ACPs presented preferential VOC adsorption order of ethyl acetate > p ‐xylene > benzene, which suggested that ACPs presented favorable adsorption ability to VOC species of polar and large molecules.