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Chemosphere

Title:		VOC destruction by water diluted hydrogen mild combustion
Author(s):		Sabia P; Romeo F; de Joannon M; Cavaliere A;
Address:		"CIRPS-Universita La Sapienza, Roma, Italy. psabia@unina.it"
Journal Title:		Chemosphere
Year:		2007
Volume:		20070206
Issue:		2
Page Number:		330 - 337
DOI:		10.1016/j.chemosphere.2006.12.061
ISSN/ISBN:		0045-6535 (Print) 0045-6535 (Linking)
Abstract:		"This study represents a preliminary numerical evaluation of the effect of steam dilution and hydrogen addition on the oxidation of formaldehyde and benzene, chosen as representative of the volatile organic compounds (VOC), in mild condition by evaluating the autoignition time and the steady state attainment. These parameters are important in the design of thermal VOC destruction plants since they influence the abatement efficiency and, therefore, the plant dimension. It has come out that, in comparison with the system diluted in nitrogen, steam induces lower autoignition times and, on the other hand, longer times for the attainment of the steady state. In contrast, for very high water content the autoignition time slightly increases. In particular results have shown that is possible to identify an optimum value of steam content that allows for the attainment of the steady state condition by the lowest residence time. Hydrogen addition to systems diluted in nitrogen promotes the oxidation reactions and anticipates the steady state condition. In steam diluted systems hydrogen delays the autoignition of the mixtures even though anticipates the attainment of the complete destruction of the VOC. The rate of production analysis has showed that the H(2)/O(2) reactions, that promote the ignition and the destruction of VOC, are sensibly modified by the presence of water and hydrogen"
Keywords:		Benzene/*chemistry Computer Simulation Formaldehyde/*chemistry Hydrogen/*chemistry Oxidation-Reduction Steam Volatilization;
Notes:		"MedlineSabia, P Romeo, F de Joannon, M Cavaliere, A eng Evaluation Study England 2007/02/09 Chemosphere. 2007 Jun; 68(2):330-7. doi: 10.1016/j.chemosphere.2006.12.061. Epub 2007 Feb 6"