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首页> 外文期刊>Environmental Science & Technology >Removal of acetaldehyde vapor with impregnated activated carbons: Effects of steric structure on impregnant and acidity
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Removal of acetaldehyde vapor with impregnated activated carbons: Effects of steric structure on impregnant and acidity

机译：用浸渍的活性炭除去乙醛蒸气：空间结构对浸渍剂和酸度的影响

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摘要

The acetaldehyde adsorption capacities of activated carbons impregnated with various amines were experimentally studied by using fixed beds, It was found that the adsorption capacity of impregnated activated carbons is influenced by the steric structure of impregnants as well as their acidity. For activated carbons impregnated with aromatic amines, ortho and meta substituents on the benzene ring hindered the condensation reaction with acetaldehyde. The activated carbon impregnated with aminobenzenesulfonic acids differed from that impregnated with the other amines in the acetaldehyde adsorption mechanism in that a Doebner-Miller reaction was involved. Also, aminobenzenesulfonic acids were not only the reactant but also the acid catalyst in the removal of acetaldehyde. Since paminobenzenesulfonic acid reacts with acetaldehyde without steric hindrance in the Doebner-Miller reaction, it is the most suitable impregnant for the chemisorption of acetaldehyde.
机译：通过固定床实验研究了用各种胺浸渍的活性炭对乙醛的吸附能力，发现浸渍后的活性炭的吸附能力受浸渍剂的空间结构及其酸度的影响。对于用芳族胺浸渍的活性炭，苯环上的邻位和间位取代基阻碍了与乙醛的缩合反应。在乙醛吸附机理中，用氨基苯磺酸浸渍的活性炭与用其他胺浸渍的活性炭的不同之处在于参与了Doebner-Miller反应。同样，氨基苯磺酸在除去乙醛中不仅是反应物，而且还是酸催化剂。由于在Doebner-Miller反应中对氨基苯磺酸与乙醛反应没有空间位阻，因此它是化学吸附乙醛的最合适的浸渍剂。

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  • 来源
    《Environmental Science & Technology》 |2005年第14期|p. 5436-5441|共6页
  • 作者

    Hayashi T; Kumita M; Otani Y;

  • 作者单位

    Toyobo Co Ltd, Res Ctr, Otsu, Shiga 5200292, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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