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Effect of deashing rice straws on their derived activated carbons produced by phosphoric acid activation

机译:稻草脱灰对磷酸活化产生的稻草衍生活性炭的影响

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摘要

We studied the effect of physically and/or chemically deashing rice straw (RS) on the adsorption capacity of their derived activated carbons (ACs) produced by chemical activation with H3PO4. Surface area and pore volumes were determined by nitrogen adsorption at 77 K. Methylene blue adsorption isotherms onto ACs were carried out, and we applied Langmuir and Freundlich models to fit the adsorption data. We showed that preliminary deashing does not bring significant improvement to the resultant ACs' properties. ACs prepared by H_3PO_4 activation of raw and deashed RS have intermediate performances between those of ACs prepared by 1- and 2-step KOH activation, but are much cheaper to produce.
机译:我们研究了物理和/或化学除灰对稻草(RS)的影响,这些稻草通过H3PO4进行化学活化而产生的衍生活性炭(AC)的吸附能力。表面积和孔体积通过在77 K下的氮吸附确定。在AC上进行亚甲基蓝吸附等温线,并应用Langmuir和Freundlich模型拟合吸附数据。我们表明,初步除灰不会显着改善所得AC的性能。通过原始和脱灰的RS的H_3PO_4活化制备的AC具有通过1步和2步KOH活化制备的AC的中间性能,但生产成本低得多。

著录项

  • 来源
    《Biomass & bioenergy》 |2011年第5期|p.1954-1959|共6页
  • 作者单位

    National Research Centre, Cellulose & Paper Dept., El-Tahrir Street, Dokki 12622, Cairo, Egypt;

    Institut Jean Lamour - UMR CNRS 7198, CNRS - Nancy-Uniuersite - UPV-Metz, Departement Chimie et Physique des Solides et des Surfaces. ENSTIB, 27 ruePhilippe Seguin, BP 1041, 88051 Epinal cedex 9, Trance;

    National Research Centre, Cellulose & Paper Dept., El-Tahrir Street, Dokki 12622, Cairo, Egypt;

    Institut Jean Lamour - UMR CNRS 7198, CNRS - Nancy-Uniuersite - UPV-Metz, Departement Chimie et Physique des Solides et des Surfaces. ENSTIB, 27 ruePhilippe Seguin, BP 1041, 88051 Epinal cedex 9, Trance;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    activated carbon; rice straw; chemical activation; phosphoric acid; adsorption;

    机译:活性炭;稻草;化学活化;磷酸;吸附;

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