Conversion of emitted dimethyl sulfide into eco-friendly species using low-temperature atmospheric argon micro-plasma system

Hsin Hung Chen, Chih Chiang Weng, Jiunn Der Liao, Liang Ming Whang, Wei Hung Kang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A custom-made atmospheric argon micro-plasma system was employed to dissociate dimethyl sulfide (DMS) into a non-foul-smelling species. The proposed system takes the advantages of low energy requirement and non-thermal process with a constant flow rate at ambient condition. In the experiments, the compositions of DMS/argon plasma, the residual gaseous phases, and solid precipitates were respectively characterized using an optical emission spectrometer, various gas-phase analyzers, and X-ray photoemission spectroscopy. For 400ppm DMS introduced into argon plasma with two pairs of electrodes (90W), a complete decomposition of DMS was achieved; the DMS became converted into excited species such as C*, C 2*, H*, and CH*. When gaseous products were taken away from the treatment area, the excited species tended to recombine and form stable compounds or species, which formed as solid particles and gaseous phases. The solid deposition was likely formed by the agglomeration of C-, H-, and S-containing species that became deposited on the quartz inner tube. For the residual gaseous phases, low-molecular-weight segments mostly recombined into relatively thermodynamic stable species, such as hydrogen, hydrogen sulfide, and carbon disulfide. The dissociation mechanism and treatment efficiency are discussed, and a treatment of converting DMS into H 2-, CS 2-, and H 2S-dominant by-products is proposed.

Original languageEnglish
Pages (from-to)185-192
Number of pages8
JournalJournal of Hazardous Materials
Volume201-202
DOIs
Publication statusPublished - 2012 Jan 30

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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