Modeling of Gas-Phase Photodegradation of Chloroform and Carbon Tetrachloride

Abstract

The relationship between the irradiance in a photoreactor and the rate of photodegradation of organics is essential in the scaling-up of photoreactors to treat large volumes of air contaminated with organic pollutants. In this study, the analysis is adopted to compare results obtained from

Modelling methane and ethane photolysis in waste gas: Optimization of reaction networks

“…One application of the projected model is to determine the possibility of removing impurities of natural gas without degrading the main component (CH 4 ). This was tested by running the model for a mixture of CH 4 and C 2 H 6 in air, in the absence of elevated NO x .…”

“…Few modelling studies with detailed kinetic analysis based on a comprehensive reaction network have been developed to investigate gas phase photolysis. Gas phase photo-dissociation of volatile organic compounds (VOCs) with a low-pressure mercury UV lamp, [2] the destruction of chlorobenzene (C 6 H 5 Cl), [3] the UV photo-oxidation of chloroform (CHCl 3 ) and carbon tetrachloride (CCl 4 ), [4] benzene (C 6 H 6 ), [5] and H 2 S and NO x [6] are examples of these modelling research studies. Among these, only the latest models [4][5][6] contain detailed chemical mechanisms and kinetics.…”

“…Gas phase photo-dissociation of volatile organic compounds (VOCs) with a low-pressure mercury UV lamp, [2] the destruction of chlorobenzene (C 6 H 5 Cl), [3] the UV photo-oxidation of chloroform (CHCl 3 ) and carbon tetrachloride (CCl 4 ), [4] benzene (C 6 H 6 ), [5] and H 2 S and NO x [6] are examples of these modelling research studies. Gas phase photo-dissociation of volatile organic compounds (VOCs) with a low-pressure mercury UV lamp, [2] the destruction of chlorobenzene (C 6 H 5 Cl), [3] the UV photo-oxidation of chloroform (CHCl 3 ) and carbon tetrachloride (CCl 4 ), [4] benzene (C 6 H 6 ), [5] and H 2 S and NO x [6] are examples of these modelling research studies.…”

“…The objective of this research study is to develop a mechanistic model for the ultraviolet degradation of CH 4 and C 2 H 6 in waste gas, and to determine which reactions can be removed from the model without significantly affecting the simulation outcome, either in the presence or the absence of NO x . Based on the outcome, a generic alkane photodegradation reaction scheme is proposed which can be used to develop models for higher alkane degradation.…”

Study on photocatalytic degradation of several volatile organic compounds

“…The use of photochemical conversion and photocatalytic oxidation technology to eliminate organic hazardous chemicals has attracted considerable interests in recent years [1][2][3]. Photolytic degradation of a variety of VOCs has been well studied, and it was demonstrated to be a simple and efficient technique to purify the polluted air [4][5][6][7][8]. Nevertheless, only some particular molecules with photochemical activity could be degraded through photolysis, and a large number of VOCs were still hard to be processed.…”