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A comparative study of two methods for the synthesis of fly ash-based sodium and potassium type zeolites

机译：粉煤灰钠钾钾沸石两种合成方法的比较研究

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摘要

Fly ash (FA) from the Rugeley Power Station, West Midlands (England) was used in a study on synthesis at laboratory scale of zeolitic materials under various conditions by two different routes. Zeolitic materials were synthesized from FA by hydrothermal treatment in NaOH (Na-phillipsite, hydroxysodalite, hydroxycancrinite, tobermorite, analcime and herschelite) and KOH (hydroxysodalite, zeolite Barrer-KF, K-chabazite and zeolite Linde Type F) solutions. By fusion with NaOH followed by hydrothermal reaction, FA was converted into faujasite and hydroxysodalite. No zeolitic materials were obtained by this method using KOH as alkali activator. The process of synthesis was optimised by applying a wide range of experimental conditions with a wide range of reaction temperature, time, alkali hydroxide concentration and solid/solution ratio. The efficiency FA-based zeolites (FAZs) for heavy metal and ammonium uptake from synthetic solutions at laboratory scale have been investigated by the authors, revealing that these FAZs may reach appropriate cation exchange capacities for their application in industrial wastewa-ter treatment.
机译：来自英格兰西米德兰兹郡Rugeley发电厂的粉煤灰（FA）用于在两种条件下通过两种不同途径在实验室规模合成沸石材料的研究。沸石材料是通过在NaOH（Na-磷铝石，羟基钠苏打石，羟基钙铝石，硅铁矿，方钠铁矿和钙长石）和KOH（羟基钠苏打石，Barrer-KF沸石，K-菱沸石和Linde型F型沸石）溶液中进行水热处理从FA合成的。通过与NaOH熔融，然后进行水热反应，将FA转化为八面沸石和羟基苏打石。使用KOH作为碱活化剂，通过该方法没有获得沸石材料。通过应用广泛的实验条件，广泛的反应温度，时间，碱金属氢氧化物浓度和固/液比来优化合成过程。作者已经研究了在实验室规模上从合成溶液中吸收重金属和铵的FA基沸石（FAZ）的效率，发现这些FAZ可能达到适当的阳离子交换能力，可用于工业废水处理。

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  • 来源
    《Fuel》 |2009年第8期|1403-1416|共14页
  • 作者

    Carlos A. Rios R.; Craig D. Williams; Clive L. Roberts;

  • 作者单位

    Escuela de Geologia, Universidad Industrial de Santander, A.A 678, Bucaramanga, Colombia School of Applied Sciences, The University of Wolverhampton, Wulfruna Street, City Campus - South, Wolverhampton WV1 1LY, UK;

    School of Applied Sciences, The University of Wolverhampton, Wulfruna Street, City Campus - South, Wolverhampton WV1 1LY, UK;

    School of Applied Sciences, The University of Wolverhampton, Wulfruna Street, City Campus - South, Wolverhampton WV1 1LY, UK;

  • 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

    fly ash; synthesis; zeolitic materials; hydrothermal; fusion;

    机译：粉煤灰合成;沸石材料;水热融合;

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