Effects of initial water content on steam reforming of aliphatic hydrocarbons with nonthermal plasma

Sugasawa, Masami; Terasawa, Tomoyuki; Futamura, Shigeru

doi:10.1016/j.elstat.2009.12.008

Cited by 15 publications

(13 citation statements)

References 15 publications

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“…Figure 8(a) also shows total consumption rate and relative consumption rate of CH 4 . Total consumption rate of CH 4 decreased with S/C, which was consistent with the result of Sugasawa et al [11]. However, due to the decrease of methane content in reactants, the relative consumption rate of CH 4 had a significant increase, resulting in an improvement of methane conversion.…”

Section: Validation Of Plasma-reforming Kinetic Modelsupporting

confidence: 91%

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Kinetic Study of Nonequilibrium Plasma-Assisted Methane Steam Reforming

Zheng

Liu

2014

Mathematical Problems in Engineering

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To develop a detailed reaction mechanism for plasma-assisted methane steam reforming, a comprehensive numerical and experimental study of effect laws on methane conversion and products yield is performed at different steam to methane molar ratio (S/C), residence time s, and reaction temperatures. A CHEMKIN-PRO software with sensitivity analysis module and path flux analysis module was used for simulations. A set of comparisons show that the developed reaction mechanism can accurately predict methane conversion and the trend of products yield in different operating conditions. Using the developed reaction mechanism in plasma-assisted kinetic model, the reaction path flux analysis was carried out. The result shows that CH3recombination is the limiting reaction for CO production and O is the critical species for CO production. Adding 40 wt.% Ni/SiO2in discharge region has significantly promoted the yield of H2, CO, or CO2in dielectric packed bed (DPB) reactor. Plasma catalytic hybrid reforming experiment verifies the reaction path flux analysis tentatively.

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Section: Validation Of Plasma-reforming Kinetic Modelsupporting

confidence: 91%

“…In experimental researches, there mainly existed two ways: one was to study the presence of dominating radicals by spectrograph [6,7] and another was to conjecture some possible reaction pathways according to products [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study of Nonequilibrium Plasma-Assisted Methane Steam Reforming

Zheng

Liu

2014

Mathematical Problems in Engineering

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“…At 4 g h –1 g –1 catalyst , the extra steam was also able to promote the water–gas shift reaction (eq ), resulting in the production of CO 2 and an increased yield of hydrogen gas. Sugasawa et al noted that increased water content increased the oxidative capacity of water to promote CO x production. However, beyond the optimum steam/carbon ratio, there is an excess of steam, which could be adsorbed on the surface of the catalyst, thereby reducing the contact of the hydrocarbons with the catalyst .…”

Section: Resultsmentioning

confidence: 99%

“…al. [63], noted that increased water content increased the oxidative capacity of water to promote COx production. However, beyond the optimum steam:carbon ratio, there is an excess of steam which could be adsorbed on the surface of the catalyst, thereby reducing the contact of the hydrocarbons with the catalyst [64].…”

Section: Influence Of Steam Input On the Pyrolysis-plasma Processmentioning

confidence: 99%

Hydrogen from Waste Plastics by Two-Stage Pyrolysis/Low-Temperature Plasma Catalytic Processing

2020

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Hydrogen was produced from waste plastic (polyethylene) using a novel two-stage pyrolysislow temperature (250 °C) plasma catalytic steam reforming process. Pyrolysis of the polyethylene generated pyrolysis gases which were catalytically steam reformed in the presence of low temperature non-thermal plasma (dielectric barrier discharge) to produce hydrogen gas. In the absence of catalyst, increasing the plasma power resulted in a significant increase in hydrogen yield. Different catalysts (Ni/Al2O3, Fe/Al2O3, Co/Al2O3 and Cu/Al2O3) were incorporated in the discharge region of the plasma reactor and the Ni/Al2O3 produced the highest yield of hydrogen at 1.5 mmol g -1 plastic. Addition of steam to the plasma catalytic process was investigated at different steam weight hourly space velocities (WHSV) using the Ni/Al2O3 catalyst. The addition of steam to promote catalytic steam reforming reactions resulted in a marked increase in hydrogen yield, producing the highest hydrogen yield of 4.56 mmol g -1 plastic at a WHSV of 4 g h -1 g -1 catalyst.

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“…It should be noted that there are competitive collision reactions of electrons with both hydrocarbons and steam, leading to lower possibilities of electrohydrocarbon collisions. 27 It can be clearly seen that both multistage systems gave higher CH 4 conversions than both single stage systems. The multistage gliding arc system used in this study provided a greater opportunity of electron collision with all reactants including CH 4 as compared with the single stage gliding arc system.…”

Section: Industrialmentioning

confidence: 90%

Synthesis Gas Production by Combined Reforming of CO₂-Containing Natural Gas with Steam and Partial Oxidation in a Multistage Gliding Arc Discharge System

Pornmai¹,

Arthiwet²,

Rueangjitt³

et al. 2014

Ind. Eng. Chem. Res.

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In this research, the effect of multistage gliding arc discharge system on the process performance of combined natural gas reforming with steam and partial oxidation has been investigated. The simulated natural gas used in this study contains 70% methane, 5% ethane, 5% propane, and 20% carbon dioxide. An increase in stage number of gliding arc reactors from 1 to 3, at a constant feed flow rate, enhances all reactant conversions and H2 yield with a substantial reduction of energy consumption. However, at a given residence time, an increase in stage number from 1 to 3 shows no effect on any hydrocarbon reactant conversions or the selectivities for H2 and CO but has a drastic reduction of energy consumption. For either the constant feed flow rate or the constant residence time, 3 stages are found to be an optimum stage number of gliding arc reactors for synthesis gas production from the reforming of CO2-containing natural gas with steam and partial oxidation, in terms of the lowest specific energy consumptions, and highest CO2 conversion with reasonably high yields for both H2 and CO.

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Effects of initial water content on steam reforming of aliphatic hydrocarbons with nonthermal plasma

Cited by 15 publications

References 15 publications

Kinetic Study of Nonequilibrium Plasma-Assisted Methane Steam Reforming

Kinetic Study of Nonequilibrium Plasma-Assisted Methane Steam Reforming

Hydrogen from Waste Plastics by Two-Stage Pyrolysis/Low-Temperature Plasma Catalytic Processing

Synthesis Gas Production by Combined Reforming of CO₂-Containing Natural Gas with Steam and Partial Oxidation in a Multistage Gliding Arc Discharge System

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Effects of initial water content on steam reforming of aliphatic hydrocarbons with nonthermal plasma

Cited by 15 publications

References 15 publications

Kinetic Study of Nonequilibrium Plasma-Assisted Methane Steam Reforming

Kinetic Study of Nonequilibrium Plasma-Assisted Methane Steam Reforming

Hydrogen from Waste Plastics by Two-Stage Pyrolysis/Low-Temperature Plasma Catalytic Processing

Synthesis Gas Production by Combined Reforming of CO2-Containing Natural Gas with Steam and Partial Oxidation in a Multistage Gliding Arc Discharge System

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Product

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Synthesis Gas Production by Combined Reforming of CO₂-Containing Natural Gas with Steam and Partial Oxidation in a Multistage Gliding Arc Discharge System