Effects of the heating history of impregnated lignocellulosic material on pore development during phosphoric acid activation

Effects of the heating history of impregnated lignocellulosic material on pore development during phosphoric acid activation
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浸渍木质纤维素材料的加热历史对磷酸活化过程中孔发育的影响

DOI:
10.1016/j.carbon.2010.04.042
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发表时间:
2010-09
期刊:
影响因子:
10.9
通讯作者:
Liu, Junli
Liu, Junli
中科院分区:
材料科学2区
文献类型:
--
作者:
Zuo, Songlin;Yang, Jianxiao;Liu, Junli

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采用磷酸浸渍杉木制备活性炭,研究浸渍材的加热历史对活性炭多孔结构的影响。根据氮吸附等温线对活性炭的孔结构的分析表明,使用中间等温处理和将加热速率减慢至300°C都有利于孔的形成,但在300°C以上具有不利影响。因此,建议采用两步加热程序进行磷酸活化。
Activated carbon samples have been prepared by heating China fir (Cunninghamia lanceolata) wood impregnated with phosphoric acid in an effort to elucidate the effect of the heating history of impregnated material on the porous texture of the activated carbon. Analysis of the pore structure of the activated carbon in terms of nitrogen adsorption isotherms showed that both using an intermediate isothermal treatment and slowing the heating rate up to 300°C favor pore development but have a detrimental effect above 300°C. Therefore, it is recommended that a two-step heating program is applied for phosphoric acid activation.
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