Topic
Deacon process
About: Deacon process is a research topic. Over the lifetime, 189 publications have been published within this topic receiving 2891 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: In this paper, the authors reviewed the new generation of technologies for chlorine recycling under the umbrella of Catalysis Engineering, that is, tackling the microlevel (catalyst design), mesolevel (reactor design), and macrolevel (process design).
Abstract: The heterogeneously catalysed oxidation of HCl to Cl2 comprises a sustainable route to recover chlorine from HCl-containing streams in the chemical industry. Conceived by Henry Deacon in 1868, this process has been rejuvenated in the last decade due to increased chlorine demand and the growing excess of by-product HCl from chlorination processes. This reaction suffered from many sterile attempts in the past two centuries to obtain sufficiently active and durable catalysts. Intense research efforts have culminated in the recent industrial implementation of RuO2-based catalysts for HCl oxidation. This paper reviews the new generation of technologies for chlorine recycling under the umbrella of Catalysis Engineering, that is, tackling the microlevel (catalyst design), mesolevel (reactor design), and macrolevel (process design). Key steps in the development are emphasised, including lab-scale catalyst screening, advanced catalyst characterisation, mechanistic and kinetic studies over model and real systems, strategies for large-scale catalyst production, mini-plant tests with a technical catalyst, and reactor design. Future perspectives, challenges, and needs in the field of catalysed Cl2 production are discussed. Scenarios motivating the choice between catalysed HCl oxidation and HCl electrolysis or their integration for optimal chlorine recycling technology are put forward.
202 citations
TL;DR: In this article, a fixed-bed reactor at ambient pressure was used to test RuO 2 powder for the Deacon reaction and showed that it is highly active for Cl 2 production, which can be attributed to the lower recombination energy of chlorine atoms to gas phase Cl 2 at high coverages and the faster surface reoxidation due to higher partial oxygen pressures.
183 citations
TL;DR: In this paper, the authors developed a low energy consuming and green process for the catalytic oxidation of HCl to Cl2, especially when compared with the electrolysis process, by using ultra-fine RuO2 crystallites that cover the surface of the TiO2 primary particles with strong interaction.
Abstract: Sumitomo Chemical has developed a low energy consuming and green process for the catalytic oxidation of HCl to Cl2, especially when compared with the electrolysis process. The RuO2/rutile-TiO2 catalyst has high catalytic activity and thermal stability due to ultra-fine RuO2 crystallites that cover the surface of the TiO2 primary particles with strong interaction. In addition, the silica modified RuO2/rutile-TiO2 catalyst shows higher thermal stability by preventing the RuO2 sintering due to using dispersed SiO2 particles. With these catalysts, high reaction rates required for industrial applications are achieved, even at low temperatures.
166 citations
TL;DR: CeO 2 and Ru doped CeO 2 nanoparticles with small particle sizes and high surface area were prepared by a simple precipitation/coprecipitation method and aqueous NaOH solution (10−wt%) as the precipitating agent, and characterized by XRD, N 2 adsorption, TEM/HRTEM, Raman, XPS and H 2 -TPR as discussed by the authors.
Abstract: CeO 2 and Ru doped CeO 2 nanoparticles with small particle sizes (∼7 nm) and high surface area (∼100 m 2 g −1 ) were prepared by a simple precipitation/coprecipitation method and aqueous NaOH solution (10 wt%) as the precipitating agent, and characterized by XRD, N 2 adsorption, TEM/HRTEM, Raman, XPS and H 2 -TPR. The catalytic combustion of chlorobenzene (CB) was investigated for the first time. The results revealed that the Ru doped CeO 2 catalysts exhibit an outstanding catalytic activity ( T 90% below 250 °C) and stability (at least 82 h at 275 °C) for CB decomposition. The better stability of the Ru-CeO 2 catalysts can be ascribed to the inorganic chlorine species or dissociative Cl adsorbed on active sites can be removed rapidly via the Deacon process catalysized by RuO 2 component with extraordinary stability (limited chlorination and easier Cl 2 evolution).
150 citations
Patent•
16 Feb 1999TL;DR: In this article, a ruthenium catalyst was used for producing chlorine by oxidation of hydrogen chloride with oxygen, which process comprises using a RUThenium catalytic catalyst.
Abstract: The present invention provides a process for producing chlorine by oxidation of hydrogen chloride with oxygen which process comprises using a ruthenium catalyst.
138 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 2 |
| 2020 | 3 |
| 2019 | 1 |
| 2018 | 3 |
| 2017 | 3 |
| 2015 | 3 |