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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Facilitated-transport supported ionic liquid membranes for the simultaneous recovery of hydrogen and carbon monoxide from nitrogen-enriched gas mixtures
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Facilitated-transport supported ionic liquid membranes for the simultaneous recovery of hydrogen and carbon monoxide from nitrogen-enriched gas mixtures

机译：Facilitated-transport支持离子液体膜的同时恢复氢气和一氧化碳氮气体混合物

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摘要

Off-gases with high content of carbon monoxide and hydrogen are often generated after a partial combustion of hydrocarbons in some industrial processes performed in reductive conditions. In these mixtures, both gases are usually accompanied by nitrogen. The selective recovery of these valuable compounds, H2 and CO, employing an efficient membrane technology is sought as a means to reduce the environmental footprint of the industrial activity. In this respect, this work provides fundamental knowledge on the transport properties of H2 through supported ionic liquid membranes (SILMs) prepared with an imidazolium-based room-temperature ionic liquid (RTIL) combined with either a chloride or a chlorocuprate(I) anion; this latter anion has already proved to enhance CO permeability across these SILMs due to a facilitated transport mechanism. Results showed that H2 is more permeable than CO and N2 through these RTILs due to its higher diffusivity. The H2/N2 and H2/CO selectivities through the chloride-based RTIL are 11 and 6, respectively. However, when the RTIL with the chlorocuprate(I) anion is employed instead of the chloride anion, the H2/N2 selectivity does not change whereas the H2/CO selectivity decreases, hence allowing obtaining a gas permeate stream with high content of both H2 and CO, and very low content of N2.
机译：高的废气一氧化碳和内容氢通常后生成部分在一些工业燃烧的碳氢化合物在还原条件下流程执行。这些混合物,通常是两种气体伴随着氮。这些有价值的化合物,H2和CO,雇佣一个高效的膜技术是寻求意味着减少环境足迹工业活动。工作提供了基础知识通过支持运输氢气的性质离子液体膜(SILMs)准备的imidazolium-based室温离子液体(RTIL)与氯或相结合chlorocuprate(我)阴离子;已经被证明是提高公司渗透率这些SILMs由于方便运输机制。通过这些RTILs由于渗透性比公司和N2其较高的扩散率。通过选择性chloride-based RTIL分别为11和6。采用阴离子chlorocuprate(我)而不是氯离子,H2 / N2选择性不改变而H2 / CO选择性降低,因此允许获得气体渗透流与H2含量高有限公司和N2含量很低。

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