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Elaboration of FAU-type zeolite beads with good mechanical performances for molecular decontamination

机译：具有良好的机械性能的FAU型沸石珠子的阐述，用于分子去污

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摘要

FAU-type zeolite beads were formed through an shearer/mixer using organic binder (carboxymethylcellulose (CMC)) or inorganic binder (anhydrous sodium metasilicate (Na2SiO3)). Mechanical and adsorption properties of these beads represent necessary characteristics for applications inmolecular decontamination. The amount of binder and the size of beads were investigated to determine the optimum conditions to elaborate mechanically stable beads with high adsorption capacities. The size of beads varies from 0.25 mm to 2 mm and the amount of binder was tuned from 5 to 15 wt% of the total bead weight. Nitrogen adsorption-desorption measurements reveal no loss of micropore volume when 5 wt% of binder is used. Adsorption of pollutants were successfully carried out using n-hexane and 1,2-dichlorobenzene as probe molecules. Indeed, FAU-type zeolite adsorbs 26 molecules of n-hexane and 29 molecules of 1,2-dichlorobenzene per unit-cell, whereas the beads prepared with 5 wt% of CMC or Na2SiO3 adsorb about 24 molecules of n-hexane and 25 molecules of 1,2-dichlorobenzene per unit-cell, respectively. The mechanical performances are improved with the addition of only 5 wt% of binder in the mixture. Uniaxial compression tests show that the ultimate compressive strength was multiplied by 4 or 7 when only 5 wt% of CMC or sodium silicate are respectively involved for the conception of 1-2 mm zeolite beads.
机译：通过使用有机粘合剂（羧甲基纤维素（CMC））或无机粘合剂（无水偏硅酸钠（NA2SIO3））通过剪切器/混合器形成FAU型沸石珠粒。这些珠子的机械和吸附性能代表了透射性净化的应用的必要特征。研究了粘合剂的量和珠子的尺寸以确定具有高吸附能力的机械稳定珠粒的最佳条件。珠粒的尺寸从0.25mm到2mm之间变化，并且粘合剂的量从总珠重的5-15重量％调谐。氮吸附 - 解吸测量揭示当使用5wt％的粘合剂时不会缺失微孔体积。使用正己烷和1,2-二氯苯作为探针分子成功地进行污染物的吸附。实际上，FAU型沸石吸附26分子的正己烷和29分子为每单位细胞的1,2-二氯苯，而用5wt％的CMC或Na 2 SiO 3制备的珠子吸附约24分子的正己烷和25分子每单位细胞的1,2-二氯苯。在混合物中加入仅加入5wt％的粘合剂，改善了机械性能。单轴压缩试验表明，当仅5wt％的CMC或硅酸钠涉及1-2mM沸石珠的概念时，最终抗压强度乘以4或7。

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  • 来源
    《RSC Advances》 |2016年第3期|共9页
  • 作者

    Rioland G.; Bullot L.; Daou T. J.; Simon-Masseron A.; Chaplais G.; Faye D.; Fiani E.; Patarin J.;

  • 作者单位

    UHA Univ Strasbourg UdS Equipe Mat Porosite Controlee MPC Inst Sci Mat Mulhouse IS2M ENSCMu F-68093 Mulhouse France;

    UHA Univ Strasbourg UdS Equipe Mat Porosite Controlee MPC Inst Sci Mat Mulhouse IS2M ENSCMu F-68093 Mulhouse France;

    UHA Univ Strasbourg UdS Equipe Mat Porosite Controlee MPC Inst Sci Mat Mulhouse IS2M ENSCMu F-68093 Mulhouse France;

    UHA Univ Strasbourg UdS Equipe Mat Porosite Controlee MPC Inst Sci Mat Mulhouse IS2M ENSCMu F-68093 Mulhouse France;

    UHA Univ Strasbourg UdS Equipe Mat Porosite Controlee MPC Inst Sci Mat Mulhouse IS2M ENSCMu F-68093 Mulhouse France;

    CNES Serv Labs &

    Expertise F-31401 Toulouse 9 France;

    French Agcy Environm &

    Energy Management ADEME F-49004 Angers 01 France;

    UHA Univ Strasbourg UdS Equipe Mat Porosite Controlee MPC Inst Sci Mat Mulhouse IS2M ENSCMu F-68093 Mulhouse France;

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