Plasma-catalytic decomposition of cyclohexane in gliding discharge reactor

Młotek, Michał; Reda, Ewelina; Jóźwik, Paweł; Krawczyk, Krzysztof; Bojar, Z.

doi:10.1016/j.apcata.2015.07.033

Cited by 9 publications

(3 citation statements)

References 32 publications

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“…Toluene was used as a model of tar compounds. The conversion of toluene was investigated in a three-phase gliding discharge reactor described previously − at normal pressure (Figure ). The 15 mm catalyst bed was located above the end of the electrodes.…”

Section: Methodsmentioning

confidence: 99%

Decomposition of Toluene in Coupled Plasma-Catalytic System

Młotek

Ulejczyk

Woroszył

et al. 2020

Ind. Eng. Chem. Res.

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The study of toluene conversion, in a gas such as the one obtained during the pyrolysis of biomass, was conducted at atmospheric pressure in homogeneous and in coupled plasma-catalytic systems. The effects of discharge power, initial concentration of toluene, and the presence of the bed of NiO/Al2O3 - G-0117 (industrial catalyst for methane water shift) on the conversion of C7H8, the composition of the outlet gas, and its calorific value have been investigated. The gas flow rate was 1000 Nl/h and the initial gas composition was CO (0.13), CO2 (0.12), H2 (0.25), and N2 (0.5). The initial toluene concentration was in the range of 2000–4000 ppm. The obtained results show that the conversion of toluene increases with discharge power and the highest one was obtained in the coupled plasma-catalytic system. It was higher than that in the homogeneous system of gliding discharge plasma. The composition of gas changed within the range of a few percent. In the outlet gas acetylene, ethylene and ethane were observed. Trace amounts of toluene were reduced to benzene and formed C3 and C4 hydrocarbons. In an extended process, the reduction of NiO to metallic nickel, methanation reaction of carbon oxides, and an increase of the conversion of toluene were observed. The conversion of toluene in the extended process was 92%. The catalytic activity of G-0117 in a coupled system increased during the study conducted for about 40 min. The use of G-0117 catalyst led to an increase in the calorific value of the outlet gas. In every examined system, it was above the minimal level demanded by engines and turbines. After the process, carbon deposits were present.

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Section: Methodsmentioning

confidence: 99%

Decomposition of Toluene in Coupled Plasma-Catalytic System

Młotek

Ulejczyk

Woroszył

et al. 2020

Ind. Eng. Chem. Res.

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“…Despite its good attributes, DBD plasma has some drawbacks, such as the formation of toxic by-products like CO, NO, NO 2 , and O 3 . Achieving the desired total oxidation of CO 2 and H 2 O is often challenging [9][10][11][12]. To address these challenges, coupling DBD plasma with photocatalysis presents a 'zero waste and zero reagent' technology with the potential for synergy and low energy consumption [13,14].…”

Section: Introductionmentioning

confidence: 99%

Treatment of Mixture Pollutants with Combined Plasma Photocatalysis in Continuous Tubular Reactors with Atmospheric-Pressure Environment: Understanding Synergetic Effect Sources

Khezami,

Assadi

2023

Materials

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This study investigates the pilot-scale combination of nonthermal plasma and photocatalysis for removing Toluene and dimethyl sulfur (DMDS), examining the influence of plasma energy and initial pollutant concentration on the performance and by-product formation in both pure compounds and mixtures. The results indicate a consistent 15% synergy effect, improving Toluene conversion rates compared to single systems. Ozone reduction and enhanced CO2 selectivity were observed when combining plasma and photocatalysis. This process effectively treats pollutant mixtures, even those containing sulfur compounds. Furthermore, tests confirm nonthermal plasma’s in-situ regeneration of the photocatalytic surface, providing a constant synergy effect.

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“…The former technique includes absorption, condensation, membrane separation, etc . The latter contains thermal incineration, catalytic oxidation, low-temperature plasma, photocatalytic oxidation, etc. , Among them, catalytic oxidation technology can directly oxidize VOCs into harmless CO 2 and H 2 O at a relatively low temperature (150–350 °C) with the assistance of catalysts and has attracted much attention in dealing with dilute VOC effluent streams (<0.5 vol %). , To realize efficient oxidation, the design and preparation of catalysts have become critical. Noble-metal − and transition-metal-oxide , catalysts are widely used in the catalytic oxidation of VOCs.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic Modification of ZSM-5-Encapsulated Uniform Pt Nanoparticles for Catalytic Oxidation of Volatile Organic Compounds

Zhu

Guo

et al. 2022

ACS Appl. Nano Mater.

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Zeolite-supported noble-metal catalysts are considered to be one of the most promising materials to achieve complete oxidation of volatile organic compounds (VOCs). However, noble metals tend to agglomerate under synthesis/reaction conditions and are easily poisoned by halogen compounds, resulting in reduced catalytic activity and stability. Herein, Pt nanoparticles (∼2 nm) encapsulated in ZSM-5 catalysts (Pt/Z-En) with a series of Si/Al molar ratios were prepared by a one-pot synthesis strategy using tetraammineplatinum nitrate as the metal precursor, and their catalytic performance for oxidation of VOCs was explored. The characterizations showed that the Pt–zeolite interaction and metal dispersion were significantly enhanced after encapsulation in zeolite. In the VOC (toluene as a model reactant) oxidation experiment, Pt/Z-En possessed higher catalytic activity compared with catalysts prepared by the impregnation method (Pt/Z-Im). In addition, hydrophobic modification by increasing the Si/Al molar ratio facilitated the adsorption of toluene and restricted the adsorption of halogen compounds (1,2-dichloroethane) on the catalyst, which further promoted catalytic activity and stability. The Pt/Z-200-En catalyst with a Si/Al molar ratio of 200 gave the optimum catalytic performance, with a toluene conversion of 98% at a temperature as low as 214 °C with long-term stability.

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Plasma-catalytic decomposition of cyclohexane in gliding discharge reactor

Cited by 9 publications

References 32 publications

Decomposition of Toluene in Coupled Plasma-Catalytic System

Decomposition of Toluene in Coupled Plasma-Catalytic System

Treatment of Mixture Pollutants with Combined Plasma Photocatalysis in Continuous Tubular Reactors with Atmospheric-Pressure Environment: Understanding Synergetic Effect Sources

Hydrophobic Modification of ZSM-5-Encapsulated Uniform Pt Nanoparticles for Catalytic Oxidation of Volatile Organic Compounds

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