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Title	Photothermal Detoxification of Air Toxics
Creator	Chen, Chien T.; Graham, John L.; Dellinger, Barry
Publisher	Digitized by J. Willard Marriott Library, University of Utah
Date	1993
Spatial Coverage	presented at Tulsa, Oklahoma
Abstract	There has long been interest in utilizing photochemical methods for the detoxification of hazardous organic materials. Unfortunately, classical, low temperature (i.e., ambient or near ambient) photochemical processes are either too slow or fail to completely mineralize the targeted wastes to be practical for wide spread use. Researchers at the University of Dayton Research Institute have recenty developed a photothermal process that overcomes the problems previously encountered with photochemical detoxification techniques. Specifically, it has been demonstrated that elevated temperatures (i.e., > 200 °C) increases the intensity of light absorption by typical hazardous organic chemicals, and that the spectral region of absorption broadens, and shifts towards the visible portion of the electromagnetic spectrum. This results in a far greater potential for air toxics to absorb near ultraviolet radiation than w as previously thought. It has also been shown elevated temperatures significantly increase the rate of photothermal reactions, making this process a viable technique for the destruction of air toxics. In this paper the authors will discuss the theoretical foundation for the photothermal detoxification process, and present a summary of the work in progress to develop a Photothermal Detoxification Unit (PDU) which will include examples of high temperature absorption spectra, and the results from actual trials with a Laboratory Scale Photothermal Detoxification Unit (LS-PDU).
Type	Text
Format	application/pdf
Language	eng
Rights	This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
Conversion Specifications	Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician	Cliodhna Davis
ARK	ark:/87278/s6hd7z7p
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ID	9245
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6hd7z7p

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Title	Page 29
Format	application/pdf
OCR Text	Show o o N CD O N CD O 100- 80- 60- 40- 20- 100 200 300 400 500 600 700 800 Temperature, °C o o N CD o o •D O 4- 3- 2- 1 - 0 •- - •- - • - - - A - - - •- - o- - Q. . - - A - • - - -V- - X - - 1-Butene-3-yne - 1-Ethynyl-4-methyl-benzene - 2-Methyl-naphthalene - 1-Methylnaphthalene - 1-Propenyl-benzene - 2-Chlorophenol • - 3-Chlorophenol - Acenaphthalene - Benzene - Naphthalene - Phenol I I I I T I I I 100 200 ! I I I I ! I I I I I TT i ' ' ' I 'I IT I 300 400 500 Temperature, °C 600 700 800 Figure 13. LS-PDU thermal decomposition data for monochlorobenzene (top) and its PICs (bottom) exposed for 10 s in air.
Setname	uu_afrc
ID	9238
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6hd7z7p/9238