AI Article Synopsis
- The gas-phase oxidation of HCl to Cl(2) is a sustainable method for recovering chlorine from HCl waste in the chemical industry, addressing increased chlorine demand and HCl byproduct excess.
- Over the years, the process faced challenges due to the limited performance of traditional catalysts, particularly Cu-based ones.
- Recent advancements have led to the development of highly effective and durable RuO(2)-based catalysts, alongside a new CeO(2)-based catalyst that shows potential for cost-effective chlorine recycling.
Article Abstract
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.
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| http://dx.doi.org/10.2533/chimia.2012.694 | DOI Listing |
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