Abstract
A novel hybrid system was established to degrade adsorbed toluene efficiently. A double dielectric barrier discharge (DDBD) reactor was filled with two common adsorbents, γ-Al2O3 and ZSM-5, in various combinations. Packing material, high-voltage electrode structure, and gas-flow mode were investigated to optimize this reactor. The reactor packed with a mixture of γ-Al2O3 and ZSM-5 provided a mineralization rate 6.1% to –14.1% greater than one using a single material. Specifically, the highest mineralization rate was obtained in a DDBD reactor packed with γ-Al2O3 in the inner tube and ZSM-5 in the outer tube. Using the optimal combination of packing material, two high-voltage electrodes were compared. A higher mineralization rate was observed in the reactor with a rod electrode (63.3%) than in one equipped with a coil electrode (53.7%), The total amounts of O3 and N2O generated were much less in the reactor with a rod electrode. The effect of gas-flow mode on toluene decomposition was investigated and the result showed that mode 1 (with the gas flowing from the inner tube into the outer tube during both adsorption and discharge phases) could not only improve the degradation of toluene, but could also suppress the generation of O3 and N2O. A possible mechanism for toluene decomposition in the packed-bed DDBD reactor was proposed based on the analysis of organic intermediates remaining in the adsorbents.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.