Mondelli Cecilia, Amrute Amol P, Moser Maximilian, Schmidt Timm, Pérez-Ramírez Javier
Institute for Chemical and Bioengineering, Department of Chemical and Applied Biosciences, ETH Zurich, Zürich, Switzerland.
Chimia (Aarau). 2012;66(9):694-8. doi: 10.2533/chimia.2012.694.
The heterogeneously catalyzed gas-phase oxidation of HCl to Cl(2) offers an energy-efficient and eco- friendly route to recover chlorine from HCl-containing byproduct streams in the chemical industry. This process has attracted renewed interest in the last decade due to an increased chlorine demand and the growing excess of byproduct HCl from chlorination processes. Since its introduction (by Deacon in 1868) and till recent times, the industrialization of this reaction has been hindered by the lack of sufficiently active and durable materials. Recently, RuO(2)-based catalysts with outstanding activity and stability have been designed and they are being implemented for large-scale Cl(2) recycling. Herein, we review the main limiting features of traditional Cu-based catalysts and survey the key steps in the development of the new generation of industrial RuO(2)-based materials. As the expansion of this technology would benefit from cheaper, but comparably robust, alternatives to RuO(2)-based catalysts, a nov el CeO(2)-based catalyst which offers promising perspectives for application in this field has been introduced.
将HCl非均相催化气相氧化为Cl₂为化学工业中从含HCl的副产物流中回收氯提供了一条节能且环保的途径。由于氯需求的增加以及氯化过程中副产HCl过量的不断增长，该过程在过去十年中重新引起了人们的关注。自其被提出（由迪肯于1868年提出）直至最近，该反应的工业化一直受到缺乏足够活性和耐久性材料的阻碍。最近，已设计出具有出色活性和稳定性的RuO₂基催化剂，并正在将其用于大规模的Cl₂回收。在此，我们综述了传统铜基催化剂的主要限制特性，并概述了新一代工业RuO₂基材料开发中的关键步骤。由于该技术的扩展将受益于比RuO₂基催化剂更便宜但同样坚固的替代品，因此已引入了一种新型的CeO₂基催化剂，该催化剂在该领域的应用具有广阔前景。
