期刊
MATERIALS LETTERS
卷 237, 期 -, 页码 22-25出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.09.171
关键词
Needle coke; Steam activation; Activated carbon; Naphthalene; Pitch
资金
- Korea Institute of Energy Research [B7-5521]
Mesoporous activated carbon was prepared from needle coke via two-stage steam activation process under high temperature. Two-stage steam activation method involves three main steps: 1st steam activation to generate mesopores and macropores above 2 nm; coating and impregnation of substances with a low molecular weight into the pores; 2nd steam activation to expand the pore size and micropore volume. The needle coke was characterized by elemental analysis, polarized light microscopy, and thermogravimetric analysis, and the porosity structure was analyzed by the Brunauer-Emmett-Teller (BET) method, the t-plot method, the Barrett-Joyner-Halenda (BJH) method, and the scanning electron microscopy (SEM). The maximum specific surface area and mesopore volume ratio of activated carbon manufactured by two-stage steam activation method was 1134 m(2)/g and 78%, respectively. The mesopore volume and average pore diameter increased as more coating and impregnation agents were added. (C) 2018 Elsevier B.V. All rights reserved.
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