Warm plasma activation of CO2 in a rotating gliding arc discharge reactor

Zhang, Hao; Li, Li; Li, Xiaodong; Wang, Weizong; Yan, Jun; Tu, Xin

doi:10.1016/j.jcou.2018.08.020

Cited by 71 publications

(55 citation statements)

References 68 publications

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“…The CO 2 concentration decreases almost linearly with the discharge energy causing an adequate increase in CO concentration. This phenomenon has been observed by many researchers in diverse non-thermal plasma sources, such as DBD [44,45], gliding arc [46,47] and microwave discharge [48,49]. It was found that high energy electrons in these electrical discharges induce vibrational excitation of CO 2 molecules, which is a highly efficient channel for CO 2 decomposition [50].…”

Section: Gaseous Compoundsmentioning

confidence: 91%

Tar Removal by Nanosecond Pulsed Dielectric Barrier Discharge

Dors

Kurzyńska

2020

Applied Sciences

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Featured Application: Biogas and biomass producer gas cleaning.Abstract: Plasma-catalytic reforming of simulated biomass tar composed of naphthalene, toluene, and benzene was carried out in a coaxial plasma reactor supplied with nanosecond high-voltage pulses. The effect of Rh-LaCoO 3 /Al 2 O 3 and Ni/Al 2 O 3 catalysts covering high-voltage electrode on the tar conversion efficiency was evaluated. Compared to the plasma reaction without a catalyst, the combination of plasma with the catalyst significantly enhanced the conversion of all three tar components, achieving complete conversion when an Rh-based catalyst was used. Apart from gaseous and liquid samples, char samples taken at five locations inside the reactor were also analyzed for their chemical composition. Char was not formed when the Rh-based catalyst was used. Different by-products were detected for the plasma reactor without a catalyst, with the Ni-and Rh-based catalysts. A possible reaction pathway in the plasma-catalytic process for naphthalene, as the most complex compound, was proposed through the combined analysis of liquid and solid products. electron density and energy, plasma homogeneity, simple design and operation, capacity to induce reactions at relatively ambient temperature, atmospheric operational pressure, and very low level of coke production [20]. The novelty of this work lies in the combination of four problems that have so far been studied independently or in a smaller combination, i.e.,: Appl. Sci. 2020, 10, 991 A typical voltage pulse is presented in Figure 2. It does not depend on the reactor geometry, condition of the dielectric barrier, presence of catalysts, or gas composition. Its half-measured width is 9 ns, which ensures fast energization of electrons and inhibits their thermalization. This way, energy delivered to the discharge is not wasted in gas heating but consumed by electrons and further the production of radicals via electron-induced dissociation of molecules.

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Section: Gaseous Compoundsmentioning

confidence: 91%

Tar Removal by Nanosecond Pulsed Dielectric Barrier Discharge

Dors

Kurzyńska

2020

Applied Sciences

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“…For that reason, thermal and warm plasmas could be used for irradiation of medium following the cooling of PTM and use in biomedical applications. Considering the high efficiency of arc or gliding arc discharges in the decomposition of CO 2 and other gases and the effective production of RONS, this type of discharge could also be employed for the effective generation and fast delivery of RONS to the target liquid [3,25,33,34]. There are many works on the generation of arc and discharges and other types of plasmas inside or on the surface of highly conductive liquids using various configurations and experimental conditions, however, generation of high-density plasma transferred to the surface of deionized water (DI) or other liquids with low electrical conductivity in ambient air is still challenging owing to the relatively high electric currents required for the stable generation of the discharge [10,11,18,23,[35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

et al. 2019

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In this work, we developed a portable device with low production and operation costs for generating an ambient air low-current arc (AALCA) that is transferred to the surface of a treated liquid. It was possible to generate a stable discharge, irrespective of the conductivity of the treated liquid, as a sequence of corona, repeating spark, and low-current arc discharges. The estimated concentration of reactive oxygen and nitrogen species (RONS) in plasma-treated water (PTW) produced using AALCA treatment was two orders of magnitude higher than that of PTW produced using conventional He nonequilibrium atmospheric pressure plasma jets or dielectric barrier discharges. The strong bactericidal effect of the treatment using AALCA and the water treated using AALCA was confirmed by survival tests of Escherichia coli. Further, the possibility of treating a continuous flow of liquid using AALCA was demonstrated.

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“…Gliding arc discharge is one of the non-thermal plasmas, which is also defined as warm plasma since the characteristics of gliding arc are intermediate between cold plasma and thermal plasma [24]. Gliding arc discharge presents some advantages over other plasma types such as atmospheric operation, high flexibility and productivity.…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanosheets Synthesis in a Gliding Arc Reactor: On the Reaction Routes and Process Parameters

Chaudhary

et al. 2020

Plasma Chem Plasma Process

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Non-thermal plasma is a promising technology for high purity nanomaterial synthesis in a fast, flexible and controllable process. Gliding arc discharge, as one of the most efficient non-thermal plasmas, has been widely used in gas treatment but rarely studied for the nanomaterial synthesis. In this study, a comparison study for carbon nanosheets synthesis including toluene dissociation and graphite exfoliation was investigated in a 2D gliding arc reactor at atmospheric pressure. The effects of gas flow rate, precursor concentration and power input on the structures of carbon nanosheets produced through the two synthesis routes were explored and compared. Amorphous carbon nanosheets were produced in both approaches with a few crystalline structures formation in the case of toluene dissociation. The thickness of carbon nanosheets synthesized from graphite exfoliation was less than 3 nm, which was thinner and more uniform than that from toluene dissociation. The flow rate of carrier gas has direct influence on the morphology of carbon nanomaterials in the case of toluene dissociation. Carbon spheres were also produced along with nanosheets when the flow rate decreased from 2 to 0.5 L/min. However, in the case of graphite exfoliation, only carbon nanosheets were observed regardless of the change in flow rate of the carrier gas. The generated chemical species and plasma gas temperatures were measured and estimated for the mechanism study, respectively.

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Warm plasma activation of CO2 in a rotating gliding arc discharge reactor

Cited by 71 publications

References 68 publications

Tar Removal by Nanosecond Pulsed Dielectric Barrier Discharge

Tar Removal by Nanosecond Pulsed Dielectric Barrier Discharge

Direct Treatment of Liquids Using Low-Current Arc in Ambient Air for Biomedical Applications

Carbon Nanosheets Synthesis in a Gliding Arc Reactor: On the Reaction Routes and Process Parameters

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