Photocatalytic oxidation of 2-propanol/toluene binary mixtures at indoor air concentration levels
[Display omitted] ► A mixture of 2-propanol and toluene, at indoor air levels, was tested by PCO. ► Almost total conversion and mineralization of the mixtures were achieved at 0% RH. ► A significant negative effect of water vapour was observed. ► Water vapour increases the number and concentration o...
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| Veröffentlicht in: | Applied catalysis. B, Environmental Environmental, 2011-09, Vol.107 (3-4), p.347-354 |
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| container_title | Applied catalysis. B, Environmental |
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| creator | Vildozo, Daniel Portela, Raquel Ferronato, Corinne Chovelon, Jean-Marc |
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► A mixture of 2-propanol and toluene, at indoor air levels, was tested by PCO. ► Almost total conversion and mineralization of the mixtures were achieved at 0% RH. ► A significant negative effect of water vapour was observed. ► Water vapour increases the number and concentration of intermediates. ► The by-products react between themselves to form new products.
Photocatalytic oxidation (PCO) technology has a great potential for indoor air purification. However, the presence of humidity and different concentrations of a variety of pollutants are critical parameters that must be addressed for indoor air cleaning applications. In this work, the photodegradation over a commercial air cleaning TiO2 filter of a mixture of two common volatile organic compounds (VOCs), 2-propanol and toluene, at indoor air concentration levels was tested and the role played by water vapour on the PCO performance was discussed. Transient and steady state experiments were performed using different inlet VOCs concentrations (80–400ppbv) and relative humidity values (RH, 0% and 60% at 25°C) in a gas flow rate of 300mLmin−1. The adsorption, conversion and mineralization efficiencies were studied. The reaction products at ppbv levels were analysed by automated thermal desorption coupled to gas chromatography–mass spectrometry (ATD–GC–MS) and gas chromatography equipped with a pulsed discharge helium photoionization detector (GC–PDHID). Almost total conversion and mineralization of the less concentrated mixtures was achieved at 0% RH. A significant negative effect of water vapour was observed. This effect can be attributed to the weak adsorption and low solubility of toluene and to the fast desorption of 2-propanol reaction intermediates. The presence of different surface species, in the photocatalytic degradation tests performed in dry and humid conditions, suggests the occurrence of different reaction pathways depending on RH. |
| doi_str_mv | 10.1016/j.apcatb.2011.07.035 |
| format | Article |
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► A mixture of 2-propanol and toluene, at indoor air levels, was tested by PCO. ► Almost total conversion and mineralization of the mixtures were achieved at 0% RH. ► A significant negative effect of water vapour was observed. ► Water vapour increases the number and concentration of intermediates. ► The by-products react between themselves to form new products.
Photocatalytic oxidation (PCO) technology has a great potential for indoor air purification. However, the presence of humidity and different concentrations of a variety of pollutants are critical parameters that must be addressed for indoor air cleaning applications. In this work, the photodegradation over a commercial air cleaning TiO2 filter of a mixture of two common volatile organic compounds (VOCs), 2-propanol and toluene, at indoor air concentration levels was tested and the role played by water vapour on the PCO performance was discussed. Transient and steady state experiments were performed using different inlet VOCs concentrations (80–400ppbv) and relative humidity values (RH, 0% and 60% at 25°C) in a gas flow rate of 300mLmin−1. The adsorption, conversion and mineralization efficiencies were studied. The reaction products at ppbv levels were analysed by automated thermal desorption coupled to gas chromatography–mass spectrometry (ATD–GC–MS) and gas chromatography equipped with a pulsed discharge helium photoionization detector (GC–PDHID). Almost total conversion and mineralization of the less concentrated mixtures was achieved at 0% RH. A significant negative effect of water vapour was observed. This effect can be attributed to the weak adsorption and low solubility of toluene and to the fast desorption of 2-propanol reaction intermediates. The presence of different surface species, in the photocatalytic degradation tests performed in dry and humid conditions, suggests the occurrence of different reaction pathways depending on RH.</description><identifier>ISSN: 0926-3373</identifier><identifier>EISSN: 1873-3883</identifier><identifier>DOI: 10.1016/j.apcatb.2011.07.035</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>2-Propanol ; Catalysis ; Chemistry ; Cleaning ; Exact sciences and technology ; General and physical chemistry ; Indoor ; Indoor air ; Mineralization ; Photocatalysis ; Photochemistry ; Physical chemistry of induced reactions (with radiations, particles and ultrasonics) ; Relative humidity ; Surface chemistry ; Surface physical chemistry ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; TiO2 ; Titanium dioxide ; Toluene ; Volatile organic compounds</subject><ispartof>Applied catalysis. B, Environmental, 2011-09, Vol.107 (3-4), p.347-354</ispartof><rights>2011 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c467t-c83c9f1da59d7a000f1698234c9df35789c4391b1b2b428932e9bdafbddc5cd93</citedby><cites>FETCH-LOGICAL-c467t-c83c9f1da59d7a000f1698234c9df35789c4391b1b2b428932e9bdafbddc5cd93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.apcatb.2011.07.035$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24505717$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Vildozo, Daniel</creatorcontrib><creatorcontrib>Portela, Raquel</creatorcontrib><creatorcontrib>Ferronato, Corinne</creatorcontrib><creatorcontrib>Chovelon, Jean-Marc</creatorcontrib><title>Photocatalytic oxidation of 2-propanol/toluene binary mixtures at indoor air concentration levels</title><title>Applied catalysis. B, Environmental</title><description>[Display omitted]
► A mixture of 2-propanol and toluene, at indoor air levels, was tested by PCO. ► Almost total conversion and mineralization of the mixtures were achieved at 0% RH. ► A significant negative effect of water vapour was observed. ► Water vapour increases the number and concentration of intermediates. ► The by-products react between themselves to form new products.
Photocatalytic oxidation (PCO) technology has a great potential for indoor air purification. However, the presence of humidity and different concentrations of a variety of pollutants are critical parameters that must be addressed for indoor air cleaning applications. In this work, the photodegradation over a commercial air cleaning TiO2 filter of a mixture of two common volatile organic compounds (VOCs), 2-propanol and toluene, at indoor air concentration levels was tested and the role played by water vapour on the PCO performance was discussed. Transient and steady state experiments were performed using different inlet VOCs concentrations (80–400ppbv) and relative humidity values (RH, 0% and 60% at 25°C) in a gas flow rate of 300mLmin−1. The adsorption, conversion and mineralization efficiencies were studied. The reaction products at ppbv levels were analysed by automated thermal desorption coupled to gas chromatography–mass spectrometry (ATD–GC–MS) and gas chromatography equipped with a pulsed discharge helium photoionization detector (GC–PDHID). Almost total conversion and mineralization of the less concentrated mixtures was achieved at 0% RH. A significant negative effect of water vapour was observed. This effect can be attributed to the weak adsorption and low solubility of toluene and to the fast desorption of 2-propanol reaction intermediates. The presence of different surface species, in the photocatalytic degradation tests performed in dry and humid conditions, suggests the occurrence of different reaction pathways depending on RH.</description><subject>2-Propanol</subject><subject>Catalysis</subject><subject>Chemistry</subject><subject>Cleaning</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Indoor</subject><subject>Indoor air</subject><subject>Mineralization</subject><subject>Photocatalysis</subject><subject>Photochemistry</subject><subject>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</subject><subject>Relative humidity</subject><subject>Surface chemistry</subject><subject>Surface physical chemistry</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>TiO2</subject><subject>Titanium dioxide</subject><subject>Toluene</subject><subject>Volatile organic compounds</subject><issn>0926-3373</issn><issn>1873-3883</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp9kE2LFDEQhoMoOK7-Aw-5iF66Nx_dk-QiyOIXLOhBz6G6ksYMmWRMMsvuvzdDLx73UNTleateHkLecjZyxvfXhxFOCG0ZBeN8ZGpkcn5GdlwrOUit5XOyY0bsBymVfEle1XpgjAkp9I7Azz-55R6G-NAC0nwfHLSQE80rFcOp5BOkHK9bjmefPF1CgvJAj-G-nYuvFBoNyeVcKIRCMSf0qZXtQvR3PtbX5MUKsfo3j_uK_P7y-dfNt-H2x9fvN59uB5z2qg2oJZqVO5iNU9D7rXxvtJATGrfKWWmDkzR84YtYJqGNFN4sDtbFOZzRGXlF3m93e-e_Z1-bPYaKPkZIPp-r7QJEn1l18sOTJFdKcW6Ynjo6bSiWXGvxqz2VcOwGLGf24t4e7ObeXtxbpmx332PvHj9ARYhrgYSh_s-KaWaz4pcmHzeue_J3wRdbMfju0IXisVmXw9OP_gFDQp2P</recordid><startdate>20110921</startdate><enddate>20110921</enddate><creator>Vildozo, Daniel</creator><creator>Portela, Raquel</creator><creator>Ferronato, Corinne</creator><creator>Chovelon, Jean-Marc</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7SU</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope><scope>L7M</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>20110921</creationdate><title>Photocatalytic oxidation of 2-propanol/toluene binary mixtures at indoor air concentration levels</title><author>Vildozo, Daniel ; Portela, Raquel ; Ferronato, Corinne ; Chovelon, Jean-Marc</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c467t-c83c9f1da59d7a000f1698234c9df35789c4391b1b2b428932e9bdafbddc5cd93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>2-Propanol</topic><topic>Catalysis</topic><topic>Chemistry</topic><topic>Cleaning</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Indoor</topic><topic>Indoor air</topic><topic>Mineralization</topic><topic>Photocatalysis</topic><topic>Photochemistry</topic><topic>Physical chemistry of induced reactions (with radiations, particles and ultrasonics)</topic><topic>Relative humidity</topic><topic>Surface chemistry</topic><topic>Surface physical chemistry</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>TiO2</topic><topic>Titanium dioxide</topic><topic>Toluene</topic><topic>Volatile organic compounds</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Vildozo, Daniel</creatorcontrib><creatorcontrib>Portela, Raquel</creatorcontrib><creatorcontrib>Ferronato, Corinne</creatorcontrib><creatorcontrib>Chovelon, Jean-Marc</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Environmental Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Applied catalysis. B, Environmental</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Vildozo, Daniel</au><au>Portela, Raquel</au><au>Ferronato, Corinne</au><au>Chovelon, Jean-Marc</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photocatalytic oxidation of 2-propanol/toluene binary mixtures at indoor air concentration levels</atitle><jtitle>Applied catalysis. B, Environmental</jtitle><date>2011-09-21</date><risdate>2011</risdate><volume>107</volume><issue>3-4</issue><spage>347</spage><epage>354</epage><pages>347-354</pages><issn>0926-3373</issn><eissn>1873-3883</eissn><abstract>[Display omitted]
► A mixture of 2-propanol and toluene, at indoor air levels, was tested by PCO. ► Almost total conversion and mineralization of the mixtures were achieved at 0% RH. ► A significant negative effect of water vapour was observed. ► Water vapour increases the number and concentration of intermediates. ► The by-products react between themselves to form new products.
Photocatalytic oxidation (PCO) technology has a great potential for indoor air purification. However, the presence of humidity and different concentrations of a variety of pollutants are critical parameters that must be addressed for indoor air cleaning applications. In this work, the photodegradation over a commercial air cleaning TiO2 filter of a mixture of two common volatile organic compounds (VOCs), 2-propanol and toluene, at indoor air concentration levels was tested and the role played by water vapour on the PCO performance was discussed. Transient and steady state experiments were performed using different inlet VOCs concentrations (80–400ppbv) and relative humidity values (RH, 0% and 60% at 25°C) in a gas flow rate of 300mLmin−1. The adsorption, conversion and mineralization efficiencies were studied. The reaction products at ppbv levels were analysed by automated thermal desorption coupled to gas chromatography–mass spectrometry (ATD–GC–MS) and gas chromatography equipped with a pulsed discharge helium photoionization detector (GC–PDHID). Almost total conversion and mineralization of the less concentrated mixtures was achieved at 0% RH. A significant negative effect of water vapour was observed. This effect can be attributed to the weak adsorption and low solubility of toluene and to the fast desorption of 2-propanol reaction intermediates. The presence of different surface species, in the photocatalytic degradation tests performed in dry and humid conditions, suggests the occurrence of different reaction pathways depending on RH.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><doi>10.1016/j.apcatb.2011.07.035</doi><tpages>8</tpages></addata></record> |
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| subjects | 2-Propanol Catalysis Chemistry Cleaning Exact sciences and technology General and physical chemistry Indoor Indoor air Mineralization Photocatalysis Photochemistry Physical chemistry of induced reactions (with radiations, particles and ultrasonics) Relative humidity Surface chemistry Surface physical chemistry Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry TiO2 Titanium dioxide Toluene Volatile organic compounds |
| title | Photocatalytic oxidation of 2-propanol/toluene binary mixtures at indoor air concentration levels |
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