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Tong Chen

Bio: Tong Chen is an academic researcher from Shandong Normal University. The author has contributed to research in topics: Nanosecond & Carbon dioxide reforming. The author has co-authored 1 publications.

Papers
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Proceedings ArticleDOI
27 May 2022
TL;DR: In this article , the authors established the kinetic model of methane pulsed dielectric barrier discharge (DBD) plasma to investigate the spatio-temporal evolution characteristics under the double-dielectric positive pulsed DBD (DDBD), single-negative pulsed (SP DBD), and single dielectrics negative pulsed dBD (SN DBD) at atmospheric pressure, and showed that the emergence of peak values (discharge current densities, average electron temperatures and densities) are later and smaller under DDBD compared with that under SP DBD and SN DBD.
Abstract: Plasma assisted CH4 directly converse into higher hydrocarbons has received particular attention in controlling the energy depletion and environmental pollution. The current work establishes the kinetic model of methane pulsed dielectric barrier discharge (DBD) plasma to investigate the spatio-temporal evolution characteristics under the double dielectric positive pulsed DBD (DDBD), single dielectric positive pulsed DBD (SP DBD), and single dielectric negative pulsed DBD (SN DBD) at atmospheric pressure. The results show that the emergence of peak values (discharge current densities, average electron temperatures and densities.) are later and smaller under DDBD compared with that under SP DBD and SN DBD. In DDBD, the distributions of the species are uniform over the plasma area at the beginning of the discharge, and then move toward the anode, gradually the species accumulate towards the cathode with the cathode sheath formed. As the discharge proceeding, the species principally distribute on the cathode. Unlike the DDBD, the majority of the species are concentrated on the anode at the start of discharge under SP DBD, then the species move toward the cathode over time. And the species mainly distribute on both electrodes. Furthermore, the species spatial distributions under SN DBD are symmetrical to that in SP DBD.

Cited by
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Journal ArticleDOI
TL;DR: In this paper , the authors report a promising plasma process for the catalyst-free single-step conversion of CH4 and CO2 into higher value oxygenates (i.e., methanol, acetic acid, ethanol, and acetone) at ambient pressure and room temperature using a water-cooled dielectric barrier discharge (DBD) reactor.

27 citations

Journal ArticleDOI
TL;DR: In this paper , a review of plasma-assisted reforming of methane (PARM) is presented from the perspective of reactor development, thermal and nonthermal PARM routes, and catalysis.
Abstract: Methane (CH4) is inexpensive, high in heating value, relatively low in carbon footprint compared to coal, and thus a promising energy resource. However, the locations of natural gas production sites are typically far from industrial areas. Therefore, transportation is needed, which could considerably increase the sale price of natural gas. Thus, the development of distributed, clean, affordable processes for the efficient conversion of CH4 has increasingly attracted people's attention. Among them are plasma technology with the advantages of mild operating conditions, low space need, and quick generation of energetic and chemically active species, which allows the reaction to occur far from the thermodynamic equilibrium and at a reasonable cost. Significant progress in plasma‐assisted reforming of methane (PARM) is achieved and reviewed in this paper from the perspectives of reactor development, thermal and nonthermal PARM routes, and catalysis. The factors affecting the conversion of reactants and the selectivity of products are studied. The findings from the past works and the insight into the existing challenges in this work should benefit the further development of reactors, high‐performance catalysts, and PARM routes.

11 citations

Journal ArticleDOI
TL;DR: In this paper , a three-electrode reactor was designed and a suspended electrode was added to further improve the hydrogen production efficiency of microwave liquid-phase discharge, and the formation of bubbles during the discharge and the change characteristics of plasma morphology were studied after adding the suspended electrode.

4 citations

Journal ArticleDOI
TL;DR: In this paper , a multi-layer feed-forward deep neural network was introduced into the plasma/plasma catalysis kinetics modeling, which enables the initial input parameters for kinetics simulation, such as reduced electric field (E/N), to be extracted from specific experimental data after the neural network has been well-trained.

3 citations

Journal ArticleDOI
TL;DR: In this article , an innovative synthesis of higher alcohols from CH4-CH3OH was driven by a highly flexible nanosecond pulsed plasma, and the products distribution was strongly correlated with the electric field variation and reactants composition, and a maximum conversion of CH4 (35.9%) and CH3OH (77.4%) were obtained at the CH4/Ar ratio of 1:2.
Abstract: The single-step conversion of CH4 to higher alcohols without catalyst or complex processing is the dream solution both in C1 chemistry and the chemical industry. Here, an innovative synthesis of higher alcohols from CH4–CH3OH was driven by a highly flexible nanosecond pulsed plasma. Experimental results showed that the products distribution was strongly correlated with the electric field variation and reactants composition, and the maximum conversion of CH4 (35.9%) and CH3OH (77.4%) were obtained at the CH4/Ar ratio of 1:2. Interestingly, the addition of H2O and H2O2 effectively promoted the C2–C4 alcohols selectivity up to 19.4%. In addition, optical diagnostics were used to obtain active species distribution and integrated insights into the C–C coupling of higher alcohols generation. A possible reaction mechanism of CH4–CH3OH plasma was also discussed.

1 citations