Isovaleraldehyde degradation using UV photocatalytic and dielectric barrier discharge reactors, and their combinations

Palau, Jordi; Assadi, Aymen Amine; Penya-Roja, J. M.; Bouzaza, Abdelkrim; Wolbert, Dominique; Martínez‐Soria, Vicente

doi:10.1016/j.jphotochem.2014.11.013

Cited by 37 publications

(15 citation statements)

References 34 publications

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“…It is observed that the CO formation in plasma and photocatalytic combined system, irrespective of the inlet concentration, is negligible. Similar results have also been reported for the photocatalytic removal of cyclohexane [13], trichloroethylene [11], and formaldehyde [28].…”

Section: End Products Analysissupporting

confidence: 88%

Pilot scale degradation of mono and multi volatile organic compounds by surface discharge plasma/TiO2 reactor: Investigation of competition and synergism

Assadi

Sivachandiran

Nguyen-Tri

et al. 2018

Journal of Hazardous Materials

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This paper mainly deals with the isovaleraldehyde degradation with the help of a nonthermal plasma surface discharge (NPSD) coupled with photocatalysis. The efficiency of NPSD reactor, for gas treatment, was studied for different binary mixtures: (1) mixture of aldehydes (Isovaleraldehyde and Butyraldehyde) and (2) mixture of aldehyde and amine (Isovaleraldehyde and Trimethylamine). A planar continuous reactor is used to investigate the effect of addition of another pollutant on the performance of oxidation process. A synergetic effect was observed by combining NPSD and photocatalysis for the degradation of mixture of pollutants. In addition, combined NPSD/photocatalysis has significantly enhanced the CO selectivity, as compared to NPSD alone. This is attributed to the formation of more reactive species due to the presence of TiO in the plasma discharge zone. Moreover, ozone and UV light on TiO, produced by plasma, have activated the surface leading to enhanced mineralization. In addition, the byproducts of each binary mixture were identified and evaluated.

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Section: End Products Analysissupporting

confidence: 88%

Pilot scale degradation of mono and multi volatile organic compounds by surface discharge plasma/TiO2 reactor: Investigation of competition and synergism

Assadi

Sivachandiran

Nguyen-Tri

et al. 2018

Journal of Hazardous Materials

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“…High purification efficiency can be achieved by combining plasma-chemical and photocatalytic purification methods with the observation of a synergistic effect [17][18][19] costs [20]. In this case, radiation quanta enhance the oxidation processes due to the formation of additional active particles, such as, for example, those in the TiO 2 photocatalyst-plasma system [21,22]…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Dielectric Barrier Discharge Plasma and TiO2-Pillared Montmorillonite on the Degradation of Rhodamine B in an Aqueous Solution

et al. 2020

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Photocatalytic, plasma and combined plasma–photocatalytic processes were applied for the destruction of a model pollutant, Rhodamine B dye, in an aqueous solution (concentration of 40 mg/L). For this purpose TiO2-pillared montmorillonite was used as a photocatalyst (characterized by X-ray analysis and low-temperature nitrogen adsorption/desorption). It was prepared by the method of intercalation of titanium hydroxocomplexes, including hydrothermal activation of the process and preliminary mechanical treatment of the layered substrate. The dielectric barrier discharge (DBD) plasma in the presence of photocatalysts increases the efficiency of dye degradation (100%, 8 s) compared to plasmolysis (94%) and UV photolysis (92%, 100 min of UV irradiation); in contrast to photolysis, destructive processes are more profound and lead to the formation of simple organic compounds such as carboxylic acids. The plasma–catalytic method enhances by 20% the energetic efficiency of the destruction of Rhodamine B compared to DBD plasma. The efficiency of dye destruction with the plasma–catalytic method increases with the improvement of the textural properties of the photocatalyst.

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“…This behavior could be explained by the occupation of the available active sites on the surface of the catalyst.Figure 4shows also that the removal efficiency of PPA decreases with increasing flow rate. This can be attributed to the decrease in the residence/contact time between the pollutant and the actives sites on the surface of the catalyst such as hydroxyl radicals[28][29][30]. BENZ (mmoL m -3 )…”

mentioning

confidence: 99%

Indoor air treatment of refrigerated food chambers with synergetic association between cold plasma and photocatalysis: Process performance and photocatalytic poisoning

Zadi

Azizi

Nasrallah

et al. 2020

Chemical Engineering Journal

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The purpose of this study is to evaluate the efficiency of non-thermal plasma (NTP) and heterogeneous photocatalytic processes for indoor air treatment of refrigerated food chambers. Propionic acid and benzene were chosen as target pollutants to simulate odors inside a fridge. Firstly, the microstructure of the used catalyst was investigated by transmission electron microscopy (TEM). The influence of operating parameters such as pollutant concentration, type of system (mono-compound or bi-compound system), duration of photocatalytic degradation and relative humidity in the indoor air were investigated. Our findings show a synergetic effect between NTP and photocatalysis for malodors removal. Additionally, the mineralization of pollutant is directly controlled by the amount of ozone produced by the plasma discharge then it decomposes on the TiO 2-based catalytic surface. Our results highlight also the key role of the generated reactive oxygen species (hydroxyl radials and atomic oxygen) in (i) propionic acid and benzene removal, (ii) selectivity of CO 2 and CO, (iii) by-products formation such as ozone formation. Moreover, the recovery of the initial photocatalytic activity was explored in details. A significant poisoning occurred when photocatalysis was carried out alone for the degradation of propionic acid and benzene. Results confirm that NTP plasma enhanced the photocatalytic activity. We also showed the effect of NTP plasma on the regeneration of the photocatalytic surface.

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Isovaleraldehyde degradation using UV photocatalytic and dielectric barrier discharge reactors, and their combinations

Cited by 37 publications

References 34 publications

Pilot scale degradation of mono and multi volatile organic compounds by surface discharge plasma/TiO2 reactor: Investigation of competition and synergism

Pilot scale degradation of mono and multi volatile organic compounds by surface discharge plasma/TiO2 reactor: Investigation of competition and synergism

Synergistic Effect of Dielectric Barrier Discharge Plasma and TiO2-Pillared Montmorillonite on the Degradation of Rhodamine B in an Aqueous Solution

Indoor air treatment of refrigerated food chambers with synergetic association between cold plasma and photocatalysis: Process performance and photocatalytic poisoning

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