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首页> 外文期刊>Separation and Purification Technology >Carbon monoxide reactive separation with basic 1-hexyl-3-methylimidazolium chlorocuprate(I) ionic liquid: Electrochemical determination of mass transport properties
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Carbon monoxide reactive separation with basic 1-hexyl-3-methylimidazolium chlorocuprate(I) ionic liquid: Electrochemical determination of mass transport properties

机译：碱性1-己基-3-甲基咪唑鎓氯铜（I）离子液体与一氧化碳的反应分离：传质性能的电化学测定

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摘要

The design of novel room temperature ionic liquid-based (RTIL) processes for gas separation relies on the correct knowledge of the mass transport properties. In the present study, the diffusivity and mass transfer coefficient of copper(I) ions in the ionic liquid 1-hexy1-3-methylimidazolium chlorocuprate are characterised since this knowledge is of great significance for the development of carbon monoxide reactive separation processes based on the selective and reversible reaction between this gas and the copper(l)-based RTIL. The diffusion coefficients were obtained from the reduction of copper(I) ions present in a 100 mmol copper(I) L-1 solution by chronopotentiometry (CP) and linear sweep voltammetry with rotating disk electrode (RDE) techniques. The diffusion coefficients obtained with CP are in the range 2.9 x 10(-9)-7.76 x 10(-9) cm(2) s(-1) for temperatures between 293 and 313 K. The effect of temperature on the diffusion coefficients is well-described by an Arrhenius-type behaviour with an activation energy of 37.0 kJ mol(-1). Mass transfer coefficients were determined by the linear sweep voltammetry method. Values obtained varied between 1.3 x 10(-6) and 7.8 x 10(-6) cm s(-1) in the temperature range 283-333 K. (C) 2014 Elsevier B.V. All rights reserved.
机译：用于气体分离的新型室温离子液体基（RTIL）工艺的设计依赖于对传质的正确认识。在本研究中，表征铜（I）离子在离子液体1-heyy1-3-甲基咪唑鎓氯铜酸盐中的扩散系数和传质系数，因为该知识对于开发基于该化合物的一氧化碳反应分离方法具有重要意义。该气体与基于铜（l）的RTIL之间的选择性和可逆反应。扩散系数是通过计时电位法（CP）和线性旋转伏安法（使用旋转圆盘电极（RDE）技术）从100 mmol铜（I）L-1溶液中存在的铜（I）离子还原获得的。对于293和313 K之间的温度，使用CP获得的扩散系数在2.9 x 10（-9）-7.76 x 10（-9）cm（2）s（-1）范围内。温度对扩散系数的影响由Arrhenius型行为很好地描述，其激活能为37.0 kJ mol（-1）。传质系数通过线性扫描伏安法测定。在283-333 K的温度范围内，获得的值在1.3 x 10（-6）和7.8 x 10（-6）cm s（-1）之间变化。（C）2014 Elsevier B.V.保留所有权利。

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