Application of Electron Beams for the Treatment of VOC Streams

Abstract

Electron-beam technology is based on using radical reactions to destroy air pollutants. Twenty volatile organic compounds (VOCs) were irradiated with electron beams in a laboratory-scale apparatus to examine the influence of the chemical structures of the VOCs from an energetic point of view. The experiments showed that the electron-beam energy required for 90% treatment could be roughly estimated from their chemical structures. The unification of a self-shielding electron accelerator with a reactor could reduce capital costs for electron-beam systems. Electronbeam technology is a promising method for the treatment of VOCs.

Energy Efficient Removal of Volatile Organic Compounds (VOCs) and Organic Hazardous Air Pollutants (o-HAPs) from Industrial Waste Streams by Direct Electron Oxidation

“…The diagram of the test system is shown in Figure 3 and results are shown in Figure 4. The data were DE-EE0003494 consistent with prior published work [2][3][4][5][6][7][8] and confirmed that it is important to characterize the electron beam oxidation for the family of compounds that will be used in the final application if absolute destruction efficiencies are to be determined. Note that, within a compound family, relative destruction efficiency (i.e., ease of oxidation) increases with increasing molecular complexity.…”

“…Typical dose requirements for VOC/o-HAP oxidation by electrons are 5 to 15kGy. [4][5][6][7] For a fixed energy, increased dose is applied by increasing the electron current that is drawn from the filament and delivered through the emitter window.…”

Organic Pollutants Treatment from Air Using Electron Beam Generated Nonthermal Plasma – Overview

“…The order of decomposition efficiency of these compounds was: TCE > PCE > DCE. Hirota et al (2004) studied dichloromethane decomposition under EB irradiation and found that it was very difficult to treat dichloromethane. For non-chlorinated organic compounds, 20 VOCs divided into five groups were investigated by Hirota et al(2004), among them, 13 VOCs were alipahtic organic compounds.…”

“…Hirota et al (2004) studied dichloromethane decomposition under EB irradiation and found that it was very difficult to treat dichloromethane. For non-chlorinated organic compounds, 20 VOCs divided into five groups were investigated by Hirota et al(2004), among them, 13 VOCs were alipahtic organic compounds. The order of decomposition VOCs in air was: cyclohexadiene > cyclohexane > benzene (group I); trans-hexane > 1-hexane (group II); heptane > hexane > pentane (group IV); and trichloroethylene > methanol >> acetone > CH 2 Cl 2 (group V).…”

“…3.4 Aromatic organic pollutants degradation in batch system under EB-irradiation 3.4.1 Concentration of aromatic organic pollutants vs. dose Decomposition of aromatic organic compounds in a batch system vs. dose under EBirradiation was studied by Hirota et al (2002Hirota et al ( , 2004, Ostapczuk et al(1999), Sun et al (2008) and Hashimoto et al (2000). Decomposition efficiency of these compounds increase with the absorbed dose increase, 4-chlorotoluene (4-CTO) decomposition as an example was presented in Fig.…”