Destruction of styrene in an air stream by packed dielectric barrier discharge reactors

Chung Liang Chang*, Hsun-Ling Bai, Shu Jen Lu

*Corresponding author for this work

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

This study presents the decomposition rates of styrene vapors with non-packed and packed bed dielectric barrier discharge reactors. The concentrations of intermediate byproducts at various plasma operation conditions were evaluated. The results showed that although styrene vapors could be almost completely removed at low styrene inlet concentration of 132ppm, the selectivity of CO2 as the major product was rather low in a non-packed bed reactor. It was found that solid carbon containing compound was the major byproduct. An increase in the styrene inlet concentration tended to reduce the styrene removal efficiency, it also led to increase in the solid byproduct. The reactors that packed with glass, Al2O3 or Pt-Pd /Al2O3 pellets could improve the styrene decomposition efficiency and reduce the formation of intermediate products, of which the best oxidation of styrene to CO2 could be achieved with a Pt-Pd /Al2O3 packed bed reactor. The carbon byproducts could also be reduced if the rector length was increased. The concentrations of ozone formed during the plasma process were also evaluated for the non-packed and packed bed reactors. The plasma reactor that packed with Pt-Pd /Al 2O3 pellets was proved to have the lowest O3 concentration.

Original languageEnglish
Pages (from-to)641-657
Number of pages17
JournalPlasma Chemistry and Plasma Processing
Volume25
Issue number6
DOIs
StatePublished - 1 Dec 2005

Keywords

  • Carbon balance
  • Catalyst
  • Dielectric barrier discharge
  • Styrene

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