Comparison of Reforming Behaviors of Hexane and Isooctane in Microwave Steam Plasma

Nakanishi, Satoshi; Sekiguchi, Hidetoshi

doi:10.1627/jpi.48.22

Cited by 15 publications

(4 citation statements)

References 13 publications

(2 reference statements)

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“…They obtained an energy yield of 4.66 g kW h À1 for decomposition at an initial concentration of 1100 ppm for both volatile organic compounds (VOCs) and an operating flow rate of 600 mL min À1 . Compared with other techniques for the decomposition of organic compounds, 16,17) the energy yields obtained in this study were not good; however, the TOC removal efficiency was as high as 99%. Taking into consideration syngas products, the DC water plasma waste treatment process using a plasma torch is an alternative green technology for treating wastewater containing high TOC concentrations.…”

Section: Resultscontrasting

confidence: 62%

Mechanisms of Decomposition of Organic Compounds by Water Plasmas at Atmospheric Pressure

Narengerile

Nishioka

Watanabe

2011

Jpn. J. Appl. Phys.

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The decomposition of acetone, methanol, and ethanol by water plasmas at atmospheric pressure has been investigated using a direct current (DC) discharge. At torch powers of 910–1050 W and organic compound concentrations of 1–10 mol %, the decomposition rate of methanol was over 99.99%, while those of acetone and/or ethanol was 96–99%. The concentrations of H2 obtained were 65–71% in the effluent gas and the removal efficiencies of 90–95% for total organic carbon (TOC) were achieved in liquid effluent for any compounds by pyrolysis. Over 50 wt % carbon in acetone or ethanol fed as the plasma supporting gas was transformed into soot, while the soot formation was negligible during methanol decomposition. On the basis of the experimental results, the mechanisms of decomposition of organic compounds in water plasmas were proposed and the mechanism of soot formation was clarified for the first time.

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Section: Resultscontrasting

confidence: 62%

Mechanisms of Decomposition of Organic Compounds by Water Plasmas at Atmospheric Pressure

Narengerile

Nishioka

Watanabe

2011

Jpn. J. Appl. Phys.

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“…It is widely accepted that hydrogen will be a common energy carrier in the future [1][2][3][4][5]. The use of a microwave plasma source (MPS) at atmospheric pressure appears to have high potential for the production of hydrogen from reforming gaseous [5][6][7][8] and liquid hydrocarbons [9,10] or alcohols [4,5,[11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic optimisation of a 2.45 GHz microwave plasma source operated at atmospheric pressure and designed for hydrogen production

Miotk

Jasiński

Mizeraczyk

2018

Plasma Sources Sci. Technol.

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This paper presents the partial electromagnetic optimisation of a 2.45 GHz cylindrical-type microwave plasma source (MPS) operated at atmospheric pressure. The presented device is designed for hydrogen production from liquid fuels, e.g. hydrocarbons and alcohols. Due to industrial requirements regarding low costs for hydrogen produced in this way, previous testing indicated that improvements were required to the electromagnetic performance of the MPS. The MPS has a duct discontinuity region, which is a result of the cylindrical structure located within the device. The microwave plasma is generated in this discontinuity region. Rigorous analysis of the region requires solving a set of Maxwell equations, which is burdensome for complicated structures. Furthermore, the presence of the microwave plasma increases the complexity of this task. To avoid calculating the complex Maxwell equations, we suggest the use of the equivalent circuit method. This work is based upon the idea of using a Weissfloch circuit to characterize the area of the duct discontinuity and the plasma. The resulting MPS equivalent circuit allowed the calculation of a capacitive metallic diaphragm, through which an improvement in the electromagnetic performance of the plasma source was obtained.

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“…Because of its high energy density, high temperature characteristics, high unit output, and low operation cost, plasma is regarded as a good method of hydrogen production [10]. The plasma reactor has various types, including microwave (MW) discharge [11][12][13][14], dielectric barrier discharge (DBD) [15][16][17][18], gliding arc discharge(GAD) [19][20][21][22][23][24][25][26], arc discharge [7,27], corona discharge [28][29][30][31][32][33][34], radio-frequency (RF) [35][36][37], glow discharge [38] and pulse discharge [39,40], which have been used for the reforming process and the research in the process of partial oxidation and autothermic reforming. For portable reforming systems, miniaturization will be a development trend of the reactor.…”

Section: Introductionmentioning

confidence: 99%

Green hydrogen from bio-ethanol reforming using micro plasma

Qiu

Wei

et al. 2020

Waste Dispos. Sustain. Energy

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Hydrogen is a kind of energy source with a characteristic of high calorific value and plasma is regarded as a good method of hydrogen production. Hydrogen produced from ethanol reforming using micro plasma can be utilized for portable applications. The study introduces water/carbon ratio, residence time, and ethanol mass flow rate as the parameters of experimental conditions, and makes ethanol conversion, gas production rate, gas product selectivity, energy consumption, and efficiency of hydrogen production per unit as the evaluation parameters of ethanol reforming reaction. The experimental results showed that (1) in the argon micro plasma: the maximum ethanol conversion of 25.3% was obtained at residence time = 2.1 ms, ethanol mass flow rate = 0.01 g/s and S/C = 1.0, and the peak value of hydrogen production of 18.7 μmol/s was achieved at residence time = 2.1 ms, ethanol mass flow rate = 0.05 g/s and S/C = 1.0; (2) in the air micro plasma: the maximum ethanol conversion of 37.4% was obtained at residence time = 2.1 ms, ethanol mass flow rate = 0.01 g/s and S/C = 1.0, and the peak value of hydrogen production of 36.8 μmol/s was achieved at residence time = 2.1 ms, ethanol mass flow rate = 0.03 g/s and S/C = 3.0. These experimental results showed that the microreactor can substantially reduce the volume of the device while producing a large amount of output.

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Comparison of Reforming Behaviors of Hexane and Isooctane in Microwave Steam Plasma

Cited by 15 publications

References 13 publications

Mechanisms of Decomposition of Organic Compounds by Water Plasmas at Atmospheric Pressure

Mechanisms of Decomposition of Organic Compounds by Water Plasmas at Atmospheric Pressure

Electromagnetic optimisation of a 2.45 GHz microwave plasma source operated at atmospheric pressure and designed for hydrogen production

Green hydrogen from bio-ethanol reforming using micro plasma

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