Decomposition of Carbon Tetrachloride by a Pulsed Corona Reactor Incorporated with In Situ Absorption

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• 作者：Liwei Huang ; Katsuhiko Nakajyo ; Takaaki Hari ; Shoji Ozawa ; and Hitoki Matsuda
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2001
• 出版时间：November 14, 2001
• 年：2001
• 卷：40
• 期：23
• 页码：5481 - 5486
• 全文大小：84K
• 年卷期：v.40,no.23(November 14, 2001)
• ISSN：1520-5045

文摘

The decomposition of carbon tetrachloride by a wire-in-tube pulsed corona reactor was tested toinvestigate the influence of the reaction agents H₂ and O₂ on the plasma decomposition of carbontetrachloride, as well as on the control of unwanted products. It was found that the decompositionof carbon tetrachloride was higher with 2% H₂ in N₂ gas and lower with 2% O₂ in N₂ gas,compared to the decomposition in N₂ atmosphere. Cl₂ and ClCN were regarded as the majorproducts from CCl₄ decomposition in N₂ atmosphere. HCl was the major FTIR-detected productfrom CCl₄ decomposition in a 2% H₂/N₂ gas mixture, whereas the products CO₂, CO, and COCl₂were detected when carbon tetrachloride was decomposed in a 2% O₂/N₂ gas mixture. To preventthe production of unwanted byproducts such as ClCN and COCl₂ from CCl₄ decomposition, acombination of nonthermal plasma and in situ absorption by coating a layer of Ca(OH)₂ on thesurface of the grounding electrode was proposed. It was demonstrated that the Ca(OH)₂ sorbentin the plasma reactor played an effective role as a scavenger participating in the CCl₄decomposition reaction by in situ capturing of the unwanted intermediates.