Gliding arc plasma reforming of toluene for on-board hydrogen production

Wang, Baowei; Liu, Shize; Peng, Yeping; Wang, Chengyu

doi:10.1016/j.ijhydene.2019.12.184

Cited by 13 publications

(1 citation statement)

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“…Several researchers demonstrate the effectiveness of plasma in the generation of H 2 from hydrocarbon gases. ,− Plasma can assist in the pyrolysis and partial oxidation of hydrocarbons, being a source of highly reactive species and high energy density. This makes plasma reforming a superior technique over conventional reforming processes.…”

Section: Resultsmentioning

confidence: 99%

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures

Denra

Matyakubov

Saud

et al. 2023

Ind. Eng. Chem. Res.

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The high removal efficiency of NO x from diesel engine exhaust gas at low temperatures remains challenging due to the poor activity of catalysts under this condition. This work investigated the effectiveness of gliding arc plasma in the NO x removal over the Ag/γ-Al 2 O 3 catalyst with n-heptane as a reducing agent source for NO x reduction. The plasma conjugated with the catalyst was performed like an injection method, i.e., a small part flow (1/26) that consisted of n-heptane was reformed to H 2 and oxygenated hydrocarbons (OHCs) by gliding arc plasma before mixing it with the gas containing NO x . Then, the overall gas was passed through the catalyst stage at various temperatures from 127 to 253 °C. The experimental data revealed that NO x removal efficiency significantly increased with plasma treatment. The enhancement by plasma treatment increased with temperature from 127 to 226 °C, but the enhancement reduced at a temperature of 253 °C. The result came from formation of H 2 and OHCs in the treated plasma gas, which reactivated NO x removal over the catalyst at low temperatures. Moreover, the enhanced NO x removal efficiency in a wide low-temperature range is obtained due to considerable hydrogen formation by the gliding arc plasma. To sum up, the highest NO x removal efficiency was 68.5% under a temperature of 226 °C and specific energy input of 34.6 J/L, while it was 20.3% for the catalyst alone; in other words, the removal efficiency increased by 48.1% with using plasma under these conditions. Owing to its low energy consumption, high-throughput gas treatment, and effectiveness at low temperatures, the technology is promising in practical applications for refining diesel exhaust gases.

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Section: Resultsmentioning

confidence: 99%

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures

Denra

Matyakubov

Saud

et al. 2023

Ind. Eng. Chem. Res.

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Hydrogen Production via Partial Oxidation Reforming of Methane with Gliding Arc Discharge Plasma

Wang

Liu

et al. 2020

ChemistrySelect

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Hydrogen production from partial oxidation reforming of methane in a gliding arc discharge (GAD) reactor is investigated. The effects of input power, the oxygen-carbon molar ratio (O/C), and residence time are studied, respectively. Products such as H 2 , CO, CO 2 , and C 2-C 4 hydrocarbons can be detected in the outlet gas. The experimental result shows that the input power of 36.4 W, the relitively low O/C of 0.705 and the 13.8 s residence time in this system will bring the highest H 2 energy yield. Compared to the decomposition of methane, partial oxidation of methane with air can maintain a stable discharge state and no carbon deposition on electrodes is observed during the reaction process. Optical emission spectroscopy (OES) is also employed to characterize this methane-air plasma. Based on the results of the experiment and OES, a possible mechanism of methane partial oxidation process was proposed, which points out that collisions of high-energy electrons and excited N 2 species (mainly N 2 (A)) with other species (such as O 2 , CH 4) in the plasma region are two main ways for the activation of this reforming system. Hydrogen is generated principally through the H-abstraction reaction and the H-coupling reaction.

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Steam reforming of methane in a gliding arc discharge reactor to produce hydrogen and its chemical kinetics study

Wang

Cheng

Wang

et al. 2022

Chemical Engineering Science

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Gliding arc plasma reforming of toluene for on-board hydrogen production

Cited by 13 publications

References 50 publications

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures

Hydrogen Production via Partial Oxidation Reforming of Methane with Gliding Arc Discharge Plasma

Steam reforming of methane in a gliding arc discharge reactor to produce hydrogen and its chemical kinetics study

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Gliding arc plasma reforming of toluene for on-board hydrogen production

Cited by 13 publications

References 50 publications

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NOxat Low Temperatures

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NOxat Low Temperatures

Hydrogen Production via Partial Oxidation Reforming of Methane with Gliding Arc Discharge Plasma

Steam reforming of methane in a gliding arc discharge reactor to produce hydrogen and its chemical kinetics study

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Product

Resources

About

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures

Essential Features of Gliding Arc Plasma for High-Performance Hydrocarbon Selective Catalytic Reduction of NO_xat Low Temperatures