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Article: Vacuum ultraviolet-irradiated photocatalysis: advanced process for toluene abatement

TitleVacuum ultraviolet-irradiated photocatalysis: advanced process for toluene abatement
Authors
KeywordsAdvanced process
Air flow-rate
Catalytic ozonation
Energetic photons
Influencing factor
Issue Date2011
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.html
Citation
Journal of Environmental Engineering, 2011, v. 137 n. 11, p. 996-1001 How to Cite?
AbstractPhotocatalysis with irradiation of a vacuum ultraviolet (VUV) lamp (VUV-PCO) was used to remove toluene in air. Two parallel reactions with irradiation of a 254nm lamp (254nm-PCO) and without TiO 2 (i.e., VUV photolysis) were conducted for comparison. The influencing factors of relative humidity, initial toluene concentration, and air flow rate were investigated. The results showed that VUV-PCO achieved much higher toluene removal efficiency and better PCO durability than 254nm-PCO under different operating conditions. 82.3% toluene conversion was obtained with 1.8ppm outlet O 3 concentration in the former, but only 14.5% with 30ppm outlet concentration of O 3 was obtained in the latter under the conditions of 1% humidity, 50ppm initial toluene concentration, and 1 L/min flow rate. Energetic photons from the VUV lamp could efficiently destruct toluene directly. O 3 formed from VUV irradiation of O 2 enhanced the toluene abatement by catalytic ozonation and inhibited the recombination of electron/hole pairs and deactivation of the photocatalyst. VUV-PCO could simultaneously overcome the limitations of the conventional PCO process. It is a promising technology for toluene abatement. © 2011 American Society of Civil Engineers.
Persistent Identifierhttp://hdl.handle.net/10722/149105
ISSN
2015 Impact Factor: 1.125
2015 SCImago Journal Rankings: 0.462
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong200907176159
Funding Information:

The authors gratefully acknowledge the financial support from the conference and research grant of the University of Hong Kong (Grant No. 200907176159).

References

 

DC FieldValueLanguage
dc.contributor.authorHuang, HBen_HK
dc.contributor.authorLeung, DYCen_HK
dc.date.accessioned2012-06-22T06:23:45Z-
dc.date.available2012-06-22T06:23:45Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal of Environmental Engineering, 2011, v. 137 n. 11, p. 996-1001en_HK
dc.identifier.issn0733-9372en_HK
dc.identifier.urihttp://hdl.handle.net/10722/149105-
dc.description.abstractPhotocatalysis with irradiation of a vacuum ultraviolet (VUV) lamp (VUV-PCO) was used to remove toluene in air. Two parallel reactions with irradiation of a 254nm lamp (254nm-PCO) and without TiO 2 (i.e., VUV photolysis) were conducted for comparison. The influencing factors of relative humidity, initial toluene concentration, and air flow rate were investigated. The results showed that VUV-PCO achieved much higher toluene removal efficiency and better PCO durability than 254nm-PCO under different operating conditions. 82.3% toluene conversion was obtained with 1.8ppm outlet O 3 concentration in the former, but only 14.5% with 30ppm outlet concentration of O 3 was obtained in the latter under the conditions of 1% humidity, 50ppm initial toluene concentration, and 1 L/min flow rate. Energetic photons from the VUV lamp could efficiently destruct toluene directly. O 3 formed from VUV irradiation of O 2 enhanced the toluene abatement by catalytic ozonation and inhibited the recombination of electron/hole pairs and deactivation of the photocatalyst. VUV-PCO could simultaneously overcome the limitations of the conventional PCO process. It is a promising technology for toluene abatement. © 2011 American Society of Civil Engineers.en_HK
dc.languageengen_US
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.htmlen_HK
dc.relation.ispartofJournal of Environmental Engineeringen_HK
dc.rightsJournal of Environmental Engineering. Copyright © American Society of Civil Engineers.-
dc.subjectAdvanced processen_HK
dc.subjectAir flow-rateen_HK
dc.subjectCatalytic ozonationen_HK
dc.subjectEnergetic photonsen_HK
dc.subjectInfluencing factor-
dc.titleVacuum ultraviolet-irradiated photocatalysis: advanced process for toluene abatementen_HK
dc.typeArticleen_HK
dc.identifier.emailHuang, HB: harbor@hku.hken_HK
dc.identifier.emailLeung, DYC: ycleung@hku.hk-
dc.identifier.authorityLeung, DYC=rp00149en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1061/(ASCE)EE.1943-7870.0000415en_HK
dc.identifier.scopuseid_2-s2.0-84055177472en_HK
dc.identifier.hkuros200100en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84055177472&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume137en_HK
dc.identifier.issue11en_HK
dc.identifier.spage996en_HK
dc.identifier.epage1001en_HK
dc.identifier.isiWOS:000298247700003-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK
dc.identifier.scopusauthoridHuang, HB=36607846400en_HK

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