Removal of NOx by photocatalytic processes |
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| Institution: | 1. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan;2. Institute for Chemical Processing of Coal, ul. Zamkowa 1, 41-803 Zabrze, Poland;1. Institute of Nanoscience and Nanotechnology, NCSR “Demokritos”, P.O. Box 60037, 153 10, Ag. Paraskevi, Attiki, Greece;2. Department of Chemistry, University of Ioannina, P.O. Box 1186, 451 10, Ioannina, Greece;1. Grupo de Fotocatálisis y Espectroscopia Aplicada al Medioambiente (FEAM, Unidad Asociada al CSIC por el Instituto de Ciencias de Materiales de Sevilla), Centro Instrumental Químico—Físico para el Desarrollo de Investigación Aplicada (CIDIA)—Dpto. de Química, Edificio Central del Parque Científico Tecnológico, Universidad de Las Palmas de Gran Canaria, Campus Universitario de Tafira, 35017 Las Palmas, Spain;2. Instituto de Ciencia de Materiales de Sevilla, Centro Mixto CSIC-Universidad de Sevilla and Dpto. de Química Inorgánica, Universidad de Sevilla, Avda. Américo Vespucio s/n, 41092 Sevilla, Spain;3. Departamento de Química Física, Instituto Universitario de Materiales y Nanotecnología, Astrofísico F. Sánchez s/n, 38205 La Laguna, Tenerife, Canary Islands, Spain;1. Institute of Nanoscience and Nanotechnology, NCSR Demokritos, Agia Paraskevi 15341, Greece;2. State Key Laboratory for Advanced Technology Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;3. Department of Chemical Engineering, National Technical University of Athens, Athens 15780, Greece;1. Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy;2. Consorzio INSTM, Via Giusti 9, 50121 Firenze, Italy;3. Dipartimento di Chimica and NIS, Center of Excellence, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy;4. Consorzio INSTM, 50121 Firenze, Italy;5. Graniti Fiandre SpA, Via Radici Nord 112, 42014 Castellarano, Italy;1. Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933, Móstoles, Madrid, Spain;2. FOTOAIR-Ciemat, Renewable Energy Division, CIEMAT, Madrid, Spain |
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| Abstract: | The photocatalytic methods for nitrogen oxides removal were recently very intense areas of scientific research. Photo-deNOx processes offer interesting ways for abatement of these harmful gases. This review describes several methods for removing NO by photocatalytic reactions. These methods can be classified into three major groups: photo selective catalytic reduction (photo-SCR), photo-oxidation and photo-decomposition. The application of photocatalysts and photo-processes for NOx abatement in real-scale cases are presented. The fast-growing development of these methods is revealed by the large number of issued patents in photo-deNOx applications. The mechanism of NO creation and the traditional methods (primary and secondary) of NOx removal are summarized and discussed. A cooperative system that combines the traditional (thermal) process and a photo-process is then proposed for improving NOx removal efficiency. |
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