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Polybenzimidazole Membranes for Hydrogen Production in the Hybrid Sulfur Electrolyzer

机译：混合硫电解槽中用于制氢的聚苯并咪唑膜

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摘要

The hybrid sulfur (HyS) thermochemical cycle has been studied as a means to produce large quantities of clean hydrogen at higher efficiencies than those possible from water electrolysis. Unfortunately, perfluorosulfonic acid polymers (e.g., Nafion) studied previously in SO2-depolarized electrolyzers for the HyS process suffer from poor proton conductivity at high acid concentrations. Therefore, alternative membranes are needed to obtain high efficiency in the electrolyzer used in the HyS process. Recent studies have shown that the HyS electrolyzer can operate with sulfuric acid-doped polybenzimidazole membranes, which have good proton conductivity when in contact with concentrated acid. Here we show model results that indicate s-PBI membranes can operate at up to 160℃ at similar acid concentrations, which can reduce kinetic resistance and should improve overall system efficiency.
机译：已经研究了杂化硫（HyS）热化学循环，作为一种以比水电解法更高的效率生产大量清洁氢气的方法。不幸的是，先前在用于HyS方法的SO 2去极化电解器中研究的全氟磺酸聚合物（例如，Nafion）在高酸浓度下质子传导性差。因此，在HyS工艺中使用的电解槽中需要替代膜来获得高效率。最近的研究表明，HyS电解槽可与掺杂硫酸的聚苯并咪唑膜一起使用，该膜与浓酸接触时质子传导性良好。在这里，我们显示了模型结果，这些结果表明s-PBI膜在相似的酸浓度下可以在高达160℃的温度下运行，这可以降低动力学阻力，并应提高整体系统效率。

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  • 会议地点 Chicago IL(US)
  • 作者

    Taylor R. Garrick; Alex Gulledge; John A. Staser; B. Benicewicz; John W. Weidner;

  • 作者单位

    Center for Electrochemical Engineering, Department of Chemical Engineering, University of South Carolina Columbia, SC, 29208, USA;

    Department of Chemistry, University of South Carolina, Columbia, SC, 29208, USA;

    Center for Electrochemical Engineering Research, Department of Chemical and Biomolecular Engineering, Ohio University, Athens, OH, 45701, USA;

    Department of Chemistry, University of South Carolina, Columbia, SC, 29208, USA;

    Center for Electrochemical Engineering, Department of Chemical Engineering, University of South Carolina Columbia, SC, 29208, USA;

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