Plasma-catalysis destruction of aromatics for environmental clean-up: Effect of temperature and configuration

Harling, Alice M.; Demidyuk, Vladimir; Fischer, Stuart J.; Whitehead, J. Christopher

doi:10.1016/j.apcatb.2008.01.017

Cited by 90 publications

(63 citation statements)

References 30 publications

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“…Remarkably, Figures 3 and 4 and Table 1 evidence that the in-situ configuration (IPC) offers the highest mineralization yield and efficiency under lean conditions of ozone. These findings are supported by the works of Harling et al [44], using Ag/TiO 2 and Ag/Al 2 O 3 , and Van Durme et al [45], using TiO 2 , who similarly report an increase in the energy efficiency of toluene degradation for lower SIE as the coupling material is used in-situ (IPC). The main hypothesis proposed to explain the higher efficiency of IPC configuration relies on the presence of additional short lived species.…”

Section: Sie (J/l)supporting

confidence: 79%

Plasma-Catalytic Mineralization of Toluene Adsorbed on CeO2

et al. 2018

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Abstract:In the context of coupling nonthermal plasmas with catalytic materials, CeO 2 is used as adsorbent for toluene and combined with plasma for toluene oxidation. Two configurations are addressed for the regeneration of toluene saturated CeO 2 : (i) in plasma-catalysis (IPC); and (ii) post plasma-catalysis (PPC). As an advanced oxidation technique, the performances of toluene mineralization by the plasma-catalytic systems are evaluated and compared through the formation of CO 2 . First, the adsorption of 100 ppm of toluene onto CeO 2 is characterized in detail. Total, reversible and irreversible adsorbed fractions are quantified. Specific attention is paid to the influence of relative humidity (RH): (i) on the adsorption of toluene on CeO 2 ; and (ii) on the formation of ozone in IPC and PPC reactors. Then, the mineralization yield and the mineralization efficiency of adsorbed toluene are defined and investigated as a function of the specific input energy (SIE). Under these conditions, IPC and PPC reactors are compared. Interestingly, the highest mineralization yield and efficiency are achieved using the in-situ configuration operated with the lowest SIE, that is, lean conditions of ozone. Based on these results, the specific impact of RH on the IPC treatment of toluene adsorbed on CeO 2 is addressed. Taking into account the impact of RH on toluene adsorption and ozone production, it is evidenced that the mineralization of toluene adsorbed on CeO 2 is directly controlled by the amount of ozone produced by the discharge and decomposed on the surface of the coupling material. Results highlight the key role of ozone in the mineralization process and the possible detrimental effect of moisture.

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Section: Sie (J/l)supporting

confidence: 79%

Plasma-Catalytic Mineralization of Toluene Adsorbed on CeO2

et al. 2018

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“…Table 1 summarizes the decomposition efficiency for benzene removal with various nonthermal plasma technologies (Vandenbroucke et al 2011). As shown in Table 1, the order of removal efficiency of dilute benzene followed the trends of Surface discharge (Kim et al 2008), DBD (Hyun-Ha et al 2005) [DBD (Zhu et al 2009) [ Multistage corona (Chavadej et al 2007) [ DBD (Park et al 2002) [ Present study [ Surface discharge (Kim et al 2005a) [ packed-bed DBD [ BaTiO 3 -packed-bed DBD (Harling et al 2008) [ DBD glow discharge (Lee et al 2004) [ DBD (Chae et al 2004) [ DBD (Lu et al 2006). SIE increases in the order of BaTiO 3 -packed bed (Harling et al 2008) \ Surface discharge (Kim et al 2008 (Park et al 2002).…”

Section: Comparison With Other Plasmasmentioning

confidence: 99%

“…As shown in Table 1, the order of removal efficiency of dilute benzene followed the trends of Surface discharge (Kim et al 2008), DBD (Hyun-Ha et al 2005) [DBD (Zhu et al 2009) [ Multistage corona (Chavadej et al 2007) [ DBD (Park et al 2002) [ Present study [ Surface discharge (Kim et al 2005a) [ packed-bed DBD [ BaTiO 3 -packed-bed DBD (Harling et al 2008) [ DBD glow discharge (Lee et al 2004) [ DBD (Chae et al 2004) [ DBD (Lu et al 2006). SIE increases in the order of BaTiO 3 -packed bed (Harling et al 2008) \ Surface discharge (Kim et al 2008 (Park et al 2002). Accordingly, the concentration of benzene (ppm): Multistage corona (Chavadej et al 2007) [ Present study [ BaTiO 3 Packed bed (Harling et al 2008) [ DBDTiO 2 (Lu et al 2006) [ Packed-bed-DBD [ Surface discharge (Kim et al 2005a) [ Surface discharge (Kim et al 2008), DBD (Park et al 2002) [ DBDTiO 2 (Chae et al 2004), DBD glow discharge (Lee et al 2004).…”

Section: Comparison With Other Plasmasmentioning

confidence: 99%

“…SIE increases in the order of BaTiO 3 -packed bed (Harling et al 2008) \ Surface discharge (Kim et al 2008 (Park et al 2002). Accordingly, the concentration of benzene (ppm): Multistage corona (Chavadej et al 2007) [ Present study [ BaTiO 3 Packed bed (Harling et al 2008) [ DBDTiO 2 (Lu et al 2006) [ Packed-bed-DBD [ Surface discharge (Kim et al 2005a) [ Surface discharge (Kim et al 2008), DBD (Park et al 2002) [ DBDTiO 2 (Chae et al 2004), DBD glow discharge (Lee et al 2004). …”

Section: Comparison With Other Plasmasmentioning

confidence: 99%

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Catalytic nonthermal plasma reactor for the abatement of low concentrations of benzene

Karuppiah

Reddy

et al. 2013

Int. J. Environ. Sci. Technol.

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Oxidative decomposition of dilute benzene in air was carried out in a dielectric barrier discharge reactor with inner metal fiber electrode that was later modified with transition metal oxides. Typical results indicated the best performance of the designed reactor for the removal of dilute benzene, where conventional techniques may not be efficient. The introduction of transition metal oxides in the discharge zone increased the conversion of benzene and shifted the product distribution to total oxidation. The performance of the reactor was further improved on humidification of air stream. The better performance of MnO x /SMF over CoO x and SMF may be due to in situ decomposition of ozone that may lead to the formation of strong oxidant atomic oxygen, whereas the best performance with TiO 2 /MnO x /SMF may be assigned due to the synergy between ozone decomposition on MnO x surface and photocatalytic action on TiO 2 .

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“…A different type of behavior was observed [14] for the destruction of toluene in atmospheric-pressure air by plasma catalysis using a one-stage, packed-bed plasma system. The results are shown in Fig.…”

Section: Toluenementioning

confidence: 99%

Plasma catalysis: A solution for environmental problems

Whitehead

2010

Pure and Applied Chemistry

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158

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The combination of a nonthermal, atmospheric plasma with a catalyst is investigated as a means of destroying pollutants in waste gas streams. Using the examples of dichloromethane (DCM) and toluene in air streams, it is shown that the destruction of the pollutant can be increased whilst lowering the operating temperature, giving increasing energy efficiency. Unwanted by-products can also be reduced selectively by appropriate choice of catalyst and of the plasma-catalyst configuration. By studying the temperature dependence of plasma catalysis, some ideas can be obtained about the nature of the interaction between plasma and catalyst in the processing.

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Plasma-catalysis destruction of aromatics for environmental clean-up: Effect of temperature and configuration

Cited by 90 publications

References 30 publications

Plasma-Catalytic Mineralization of Toluene Adsorbed on CeO2

Plasma-Catalytic Mineralization of Toluene Adsorbed on CeO2

Catalytic nonthermal plasma reactor for the abatement of low concentrations of benzene

Plasma catalysis: A solution for environmental problems

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