Effects of the crystallinity of lignocellulosic material on the porosity of phosphoric acid-activated carbon

Effects of the crystallinity of lignocellulosic material on the porosity of phosphoric acid-activated carbon
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木质纤维素材料结晶度对磷酸活性炭孔隙率的影响

DOI:
10.1016/j.carbon.2009.08.026
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发表时间:
2009-12
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;Cai, Xuan;Yang, Jianxiao;Liu, Junli

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由三种不同的木质纤维素材料或通过磷酸活化以不同长度的浸渍时间制备活性炭。根据氮气吸附等温线分析了活性炭的多孔结构,并通过X射线衍射法测量了木质纤维素材料的结晶度。结果表明,降低木质纤维素材料的结晶度可促进孔隙发育,尤其是中孔。然而,过度浸渍不利于活化。浸渍和母体木质纤维素材料的选择对磷酸活化过程中孔隙度的形成具有类似的影响。
Activated carbons were prepared from three different lignocellulosic materials or in various lengths of impregnation time by phosphoric acid activation. The porous texture of activated carbon was analyzed in terms of the adsorption isotherm of nitrogen, and the crystallinity of lignocellulosic material was measured by X-ray diffraction method. The results showed that decreasing the crystallinity of lignocellulosic material promotes pore development, especially of mesopores. However, excessive impregnation is detrimental to activation. Impregnation and the selection of parent lignocellulosic material have a similar effect on developing porosity during phosphoric acid activation.
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