Laboratory-scale photomineralization of n-alkanes in gaseous phase by photocatalytic membranes immobilizing titanium dioxide
Kinetics of photocatalytic oxidation of methane, ethane, and n-heptane, to yield intermediates, and photomineralization of intermediates, to yield carbon dioxide and water, was studied in the gaseous phase, at 308±2 K, by a laboratory-scale photoreactor and photocatalytic membranes immobilizing 30±3...
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| Format: | Article |
| Language: | English |
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Wiley
2006-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/IJP/2006/73167 |
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| author | Ignazio Renato Bellobono Rodica Stanescu Cristina Costache Carmen Canevali Franca Morazzoni Roberto Scotti Riccardo Bianchi Emilia Simona Mangone Giulia de Martini Paola Maria Tozzi |
| author_facet | Ignazio Renato Bellobono Rodica Stanescu Cristina Costache Carmen Canevali Franca Morazzoni Roberto Scotti Riccardo Bianchi Emilia Simona Mangone Giulia de Martini Paola Maria Tozzi |
| author_sort | Ignazio Renato Bellobono |
| collection | DOAJ |
| description | Kinetics of photocatalytic oxidation of methane, ethane, and n-heptane, to yield intermediates, and photomineralization of intermediates, to yield carbon dioxide and water, was studied in the gaseous phase, at 308±2 K, by a laboratory-scale photoreactor and photocatalytic membranes immobilizing 30±3 wt.% of TiO2, in the presence of aerosolized stoichiometric hydrogen peroxide as oxygen donor, and at a relative humidity close to 100%. The whole volume of irradiated solution was 4.000±0.005 L, the ratio between this volume and the geometrical apparent surface of the irradiated side of the photocatalytic membrane was 3.8±0.1 cm, and the absorbed power was 0.30 W/cm (cylindrical geometry). The pinetic parameters of the present work substantially coincide with those of the same molecules previously studied in aqueous solution, within the limits of experimental uncertainty. Photocatalytic processes thus appear to be controlled by interface phenomena, which are ruled kinetically, and apparently also thermodynamically, by concentration gradients, independently on diffusion and other processes in the aqueous or gaseous bulk, if turbulence in these phases is adequately assured. |
| format | Article |
| id | doaj-art-d15ba2346e444a86924a91b7e7e3ee5e |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2006-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-d15ba2346e444a86924a91b7e7e3ee5e2025-02-03T06:13:11ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2006-01-01200610.1155/IJP/2006/7316773167Laboratory-scale photomineralization of n-alkanes in gaseous phase by photocatalytic membranes immobilizing titanium dioxideIgnazio Renato Bellobono0Rodica Stanescu1Cristina Costache2Carmen Canevali3Franca Morazzoni4Roberto Scotti5Riccardo Bianchi6Emilia Simona Mangone7Giulia de Martini8Paola Maria Tozzi9Environmental Research Centre, University of Milan, Via C. Golgi 19, Milan 20133, ItalyDepartment of Inorganic Technology and Environmental Protection, Faculty of Industrial Chemistry, Polytechnic University of Bucharest, Bucharest 011061, RomaniaDepartment of Inorganic Technology and Environmental Protection, Faculty of Industrial Chemistry, Polytechnic University of Bucharest, Bucharest 011061, RomaniaDepartment of Materials Science, University of Milano Bicocca, Milan 20126, ItalyDepartment of Materials Science, University of Milano Bicocca, Milan 20126, ItalyDepartment of Materials Science, University of Milano Bicocca, Milan 20126, ItalyCNR, ISTM, Institute of Molecular Sciences and Technologies, Milan 20133, ItalyR&D Group, BIT srl, Milan 20121, ItalyR&D Group, BIT srl, Milan 20121, ItalyR&D Group, BIT srl, Milan 20121, ItalyKinetics of photocatalytic oxidation of methane, ethane, and n-heptane, to yield intermediates, and photomineralization of intermediates, to yield carbon dioxide and water, was studied in the gaseous phase, at 308±2 K, by a laboratory-scale photoreactor and photocatalytic membranes immobilizing 30±3 wt.% of TiO2, in the presence of aerosolized stoichiometric hydrogen peroxide as oxygen donor, and at a relative humidity close to 100%. The whole volume of irradiated solution was 4.000±0.005 L, the ratio between this volume and the geometrical apparent surface of the irradiated side of the photocatalytic membrane was 3.8±0.1 cm, and the absorbed power was 0.30 W/cm (cylindrical geometry). The pinetic parameters of the present work substantially coincide with those of the same molecules previously studied in aqueous solution, within the limits of experimental uncertainty. Photocatalytic processes thus appear to be controlled by interface phenomena, which are ruled kinetically, and apparently also thermodynamically, by concentration gradients, independently on diffusion and other processes in the aqueous or gaseous bulk, if turbulence in these phases is adequately assured.http://dx.doi.org/10.1155/IJP/2006/73167 |
| spellingShingle | Ignazio Renato Bellobono Rodica Stanescu Cristina Costache Carmen Canevali Franca Morazzoni Roberto Scotti Riccardo Bianchi Emilia Simona Mangone Giulia de Martini Paola Maria Tozzi Laboratory-scale photomineralization of n-alkanes in gaseous phase by photocatalytic membranes immobilizing titanium dioxide International Journal of Photoenergy |
| title | Laboratory-scale photomineralization of n-alkanes in gaseous phase by photocatalytic membranes immobilizing titanium dioxide |
| title_full | Laboratory-scale photomineralization of n-alkanes in gaseous phase by photocatalytic membranes immobilizing titanium dioxide |
| title_fullStr | Laboratory-scale photomineralization of n-alkanes in gaseous phase by photocatalytic membranes immobilizing titanium dioxide |
| title_full_unstemmed | Laboratory-scale photomineralization of n-alkanes in gaseous phase by photocatalytic membranes immobilizing titanium dioxide |
| title_short | Laboratory-scale photomineralization of n-alkanes in gaseous phase by photocatalytic membranes immobilizing titanium dioxide |
| title_sort | laboratory scale photomineralization of n alkanes in gaseous phase by photocatalytic membranes immobilizing titanium dioxide |
| url | http://dx.doi.org/10.1155/IJP/2006/73167 |
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