期刊
CHEMICAL ENGINEERING JOURNAL
卷 195, 期 -, 页码 233-240出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2012.04.094
关键词
Gaseous 1,2-DCBz; Ozone-assisted photocatalysis; Intermediate products; Degradation pathways
资金
- National State Basic Research Program of China (973 Program) [2011CB201500]
- National Project of Scientific and Technical Supporting Program [2007BAC27B04]
- Zhejiang University Y.C. Tang Disciplinary Development Fund
- Program of Introducing Talents of Discipline to University [B08026]
Gaseous 1,2-dichlorobenzene (1,2-DCBz) was photocatalytically decomposed on a powdered TiO2 layer using UV-light, or the latter combined with ozone addition. The effect of various experimental parameters was studied, including inlet concentrations of ozone, UV irradiation or not, carrier gas (dry air or nitrogen) and treatment time period. A temperature of 150 degrees C is selected, to replicate flue gas conditions after bag house filter. An optimum ozone addition of ca. 165 ppm was established, higher concentrations barely improving photocatalytic removal. Possible pathways and mechanisms are discussed on the basis of the intermediate products identified, the chloride ions distribution in the effluent and catalyst surface, and a carbon conversion balance. (c) 2012 Elsevier B.V. All rights reserved.
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