Removal of low-concentration BTX in air using a combined plasma catalysis system.
The behavior of non-thermal plasma (NTP) and combined plasma catalysis (CPC) was investigated for removal of low-concentration benzene, toluene and p-xylene (BTX mixture) in air using a link tooth wheel-cylinder plasma reactor. Combining NTP with MnO(x)/Al(2)O(3) catalyst after the discharge zone (CPC) significantly promoted BTX conversion and improved the energy efficiency. For a specific input energy (SIE) of 10 JL(-1), the conversion of benzene, toluene and p-xylene reached 94%, 97% and 95%, respectively. The introduction of MnO(x)/Al(2)O(3) catalyst also moved the BTX conversion towards total oxidation and reduced the emission of O(3) and NO(2) as compared to NTP alone. For an SIE of 10 JL(-1), the O(3) outlet concentration decreased from 46.7 for NTP alone to 1.9 ppm for CPC, while the NO(2) emission correspondingly decreased from 1380 to 40 ppb.
School of Chemistry and Environment, Beihang University, Beijing 100191, China. fanxing0711@sina.com
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D000388:Air; D016902:Air Pollution, Indoor / Q000032:analysis* / Q000517:prevention & control; D000537:Aluminum Oxide / Q000737:chemistry; D001554:Benzene / Q000032:analysis*; D002384:Catalysis; D004735:Energy Transfer; D052918:Environmental Restoration and Remediation / Q000379:methods*; D017895:Manganese Compounds / Q000737:chemistry; D009569:Nitric Oxide / Q000032:analysis; D010087:Oxides / Q000737:chemistry; D010126:Ozone / Q000032:analysis; D014050:Toluene / Q000032:analysis*; D014992:Xylenes / Q000032:analysis*
D017895:Manganese Compounds; D010087:Oxides; D014992:Xylenes; D009569:Nitric Oxide; D014050:Toluene; C027424:manganese oxide; D010126:Ozone; C031286:4-xylene; D001554:Benzene; D000537:Aluminum Oxide