Due to the steadily increasing production capacities of polycarbonates and polyurethanes, the volume of hydrogen chloride (HCl), which emerges as byproduct from these processes, is experiencing a significant growth. Owing to the oversaturation of the market for HCl and hydrochloric acid, the question on how to utilize this byproduct in a sustainable and energy-efficient way is becoming more and more important. The oxidation of HCl to chlorine, which can be redirected as an educt to these above mentioned processes, offers a feasible solution to this problem and can be carried out either heterogeneously catalyzed at high temperatures or through electrolysis. Up to now, the most energy-efficient industrially employed electrochemical variant is the Bayer UHDENORA process, based on aqueous hydrochloric acid as a feed stock. The major objective of this work is to propose a novel electrochemical process utilizing HCl as a gaseous reactor feed in order to significantly reduce the electrical energy demand of the reactor combined with new and more energy-efficient subsequent separation sequences. For this purpose, flowsheet simulations of the Bayer UHDENORA process and two novel process variants based on the gas phase reactor and two different separation sequences were carried out and followed by a detailed exergy analysis. The analysis shows significant exergetic savings of up to 38 % in this novel process variants compared to the Bayer UHDENORA process, including not only the electrochemical reactor but also the subsequent separation steps. The novel process therefore allows for a more sustainable and energy-efficient production of the base chemical chlorine and, contrary to the heterogeneously catalyzed high temperature process, for the utilization of electrical energy from advancing renewable sources like wind and sun.

由于聚碳酸酯和聚氨酯的生产能力不断提高，作为这些工艺副产品出现的氯化氢（HCl）的体积正经历着显着增长。由于HCl和盐酸市场的过度饱和，关于如何以可持续和节能的方式利用这种副产物的问题变得越来越重要。HCl氧化成氯，可以将其作为离析物重新定向到上述方法中，为解决该问题提供了可行的解决方案，可以在高温下进行非均相催化或通过电解进行。迄今为止，工业上使用的最节能的电化学方法是基于盐酸水溶液作为原料的拜耳UHDENORA工艺。这项工作的主要目的是提出一种新颖的电化学方法，该方法利用HCl作为气态反应器进料，以显着降低反应器的电能需求，并结合新的，更节能的后续分离程序。为此，对拜耳UHDENORA工艺以及基于气相反应器和两种不同分离顺序的两种新型工艺进行了流程模拟，然后进行了详细的火用分析。分析表明，与拜耳UHDENORA工艺相比，这种新颖的工艺方案可节省多达38％的显着能量，不仅包括电化学反应器，而且包括后续的分离步骤。因此，新工艺可以更可持续和更节能地生产基础化学氯，并且