Effects of Zeolitic Parameters and Irradiation on the Retention Properties of Silver Zeolites Exposed to Molecular Iodine,Industrial & Engineering Chemistry Research

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Effects of Zeolitic Parameters and Irradiation on the Retention Properties of Silver Zeolites Exposed to Molecular Iodine
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-01-24 00:00:00 , DOI: 10.1021/acs.iecr.7b03579
Bruno Azambre ₁ , Mouheb Chebbi ₁ , Olivia Leroy ₂ , Laurent Cantrel ₂

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We have investigated the iodine retention behavior of silver zeolite sorbents under a variety of conditions. First, a preliminary study was achieved for the liquid phase in order to determine (i) the main kinetic and thermodynamic characteristics pertaining to the adsorption behavior and (ii) the influence of some zeolitic parameters (nature of the framework, silver content, preparation method, etc.) on the adsorption capacities. Thanks to the online monitoring of gas-phase I₂ concentrations by UV–vis spectroscopy, the iodine dynamic adsorption/desorption behavior of some selected sorbents was then studied at 100 °C. It was found that faujasite sorbents with silver content higher than 20 wt % could maintain a high working capacity (up to 330 mg/g) and present a high ability for irreversible trapping. Finally, the stability of trapped iodine species was evidenced using additional tests performed at 120 °C in the presence of irradiation and humidity.

中文翻译：

沸石参数和辐照度对分子碘作用下银沸石保留性能的影响

我们已经研究了在各种条件下银沸石吸附剂的碘保留行为。首先，对液相进行了初步研究，以确定（i）与吸附行为有关的主要动力学和热力学特征，以及（ii）某些沸石参数（骨架的性质，银含量，制备方法）的影响。等）的吸附能力。多亏了在线监测气相I ₂通过紫外可见分光光度法测定浓度，然后在100°C下研究了某些选定吸附剂的碘动态吸附/解吸行为。已发现银含量高于20 wt％的八面沸石吸附剂可保持较高的工作能力（高达330 mg / g），并且具有不可逆捕集的高能力。最后，在有辐射和潮湿的情况下，在120°C进行的其他测试证明了被困碘物种的稳定性。

更新日期：2018-01-24

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