Degradation Of Volatile Organic Compounds In The Gas Phase By Heterogeneous Photocatalysis With Titanium Dioxide/ultraviolet Light

dc.creatorRochetto
dc.creatorUrsula Luana; Tomaz
dc.creatorEdson
dc.date2015
dc.date2016-06-07T13:32:55Z
dc.date2016-06-07T13:32:55Z
dc.date.accessioned2018-03-29T01:48:40Z
dc.date.available2018-03-29T01:48:40Z
dc.identifier
dc.identifierDegradation Of Volatile Organic Compounds In The Gas Phase By Heterogeneous Photocatalysis With Titanium Dioxide/ultraviolet Light. Taylor & Francis Inc, v. 65, p. 810-817 2015.
dc.identifier1096-2247
dc.identifierWOS:000356374800007
dc.identifier10.1080/10962247.2015.1020117
dc.identifierhttp://www.tandfonline.com/doi/full/10.1080/10962247.2015.1020117
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/243571
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1307269
dc.descriptionThis work presents an overview over heterogeneous photocatalysis performed in gas phase towards the degradation of o-xylene, n-hexane, n-octane, n-decane, methylcyclohexane and 2,2,4-trimethylpentane. The experimental set-up composed by a titanium plug flow reactor vessel contained a quartz tube with a 100 W UV lamp placed at center position from 1.7 cm to the quartz wall. A titanium dioxide film was immobilized on the internal walls of the reactor and used as catalyst. All measurements were taken after reaching steady state condition and evaluated at the inlet and outlet of the system. Conversion rates were studied in a wide range of residence times yielding to a 90% or above conversion as from 20 seconds of residence time. During experiments the temperature of reactor's wall was monitored and remained between 52 and 62 degrees C. Temperature influence over degradation rates was negligible once a control experiment performed at 15 degrees C did not modify outgoing results. Humidity effect was also evaluated showing an ideal working range of 10 - 80% with abrupt conversion decay outside the range. By varying inlet concentration between 60 and 110 ppmv the VOC degradation curves remained unchanged. Loss over catalytic activity was only observed for o-xylene after 30 minutes of reaction, the catalyst was reactivated with a solution of hydrogen peroxide and UV light followed by additional deposition of the catalytic layer. The kinetic study suggests a first order reaction rate.Implications: The study of effective and economically viable techniques on the treatment of volatile organic compounds (VOCs) has being highlighted as an important parameter on the environmental research. The heterogeneous photocatalysis in gas phase was proved to be an effective process for the degradation of the nonaromatic VOCs tested, yielding high conversion values for the optimized systems.
dc.description65
dc.description7
dc.description
dc.description810
dc.description817
dc.description
dc.description
dc.description
dc.languageen
dc.publisherTAYLOR & FRANCIS INC
dc.publisher
dc.publisherPHILADELPHIA
dc.relationJOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
dc.rightsembargo
dc.sourceWOS
dc.subjectOxidation
dc.subjectDioxide
dc.subjectTio2
dc.subjectAir
dc.subjectTrichloroethylene
dc.subjectPhotooxidation
dc.subjectBenzene
dc.subjectVocs
dc.titleDegradation Of Volatile Organic Compounds In The Gas Phase By Heterogeneous Photocatalysis With Titanium Dioxide/ultraviolet Light
dc.typeArtículos de revistas


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