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.
Fan
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School of Chemistry and Environment, Beihang University, Beijing 100191, China. fanxing0711@sina.com
Zhu
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TL
Wang
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MY
Li
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XM
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