Volatile organic compounds (VOCs) of anthropogenic origin are important air pollutants emitted largely by industries, vehicles and domestic cooking using fossil fuels, especially bio-fuels. Many VOCs (e.g., benzene, toluene, ethylbenzene and xylene (BTEX)) are toxic and some are carcinogenic, mutagenic or teratogenic. http://moef.gov.in/wp-content/uploads/2019/02/Final-Technical-Report.pdf
Volatile Organic Compounds (VOCs) are harmful air pollutants and affect skin, central nervous system, kidney and liver. The half life period of these VOCs in the atmosphere is about six years. It thus becomes necessary to reduce VOCs concentration at source and in the atmosphere as well. While much research has been going on TiO2 based Photocatalytic Oxidation (PCO) of VOCs, its commercial application has remained a challenge. A Photocatalytic Oxidation (PCO) technology for industrial use for controlling VOCs at source and in situ ambient air using nano-semiconductor catalysts (TiO2) and ultraviolet (UV) radiation (external source and/or solar UV radiation) has been developed. Anatase phase, nanosized TiO2 catalysts with high surface roughness and BET surface area were synthesized over borosilicate glass substrate. The photocatalytic activity of the coating was evaluated by gas phase degradation of volatile organic compounds (VOC) in presence of UV light. A carbon balance was carried out with the help of meathanizer for the continuous reactor system to ensure quality of experimental work. The developed continuous reactor was effective in degrading VOCs, within a short retention time of seven minutes. IIT Kanpur, through a Ministry of Environment and Forests (MoEF) sponsored project and Aarti Industries Limited, Vapi, Gujarat, has developed a pilot testing set-up for industrial application of the technology. The technology has achieved an overall efficiency of 61 and 77 per cent with one and two reactors (in series).
Link: An overall efficiency of 61 and 77 per cent with one and two reactors (in series). A cylindrical batch reactor (made of glass B-50) having a dimension of 50 mm internal diameter and 370 mm height (actual volume 700 cm3 and effective volume 676 cm3 ) was used The TiO2-coated aluminum sheet was placed inside the reactor https://www.researchgate.net/profile/Indramani_Dhada/publication/273159529_Photo- catalytic_oxidation_of_individual_and_mixture_of_benzene_toluene_and_p- xylene/links/55539fc308ae980ca6085938/Photo-catalytic-oxidation-of- individual-and-mixture-of-benzene-toluene-and-p-xylene.pdf
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