Production of CN(B2Σ+) state from dissociative excitation reaction of BrCN with microwave discharge flow of Ar

Ito, Hajime; Kawamura, Yuta

doi:10.1016/j.jnoncrysol.2008.02.010

Cited by 9 publications

(8 citation statements)

References 39 publications

(58 reference statements)

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“…The apparatus was essentially the same as that used in our previous study [8]. Ar gas (99.999% purity) was introduced through a discharge tube made of Pyrex glass into the reaction chamber evacuated using a combination Torr.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous study, we have analyzed the mechanism of the production of the CN(B 2  + ) state from the decomposition of BrCN where the pressure of Ar is varied to change the density of Ar( 3 P 0,2 ) and the density, n e , and temperature, T e , of free electrons [8]. This method has the advantage that it does not require the rate constants for (1)- (4).…”

Section: Introductionmentioning

confidence: 99%

“…In this study, the method employed in ref. [8] was applied to elucidate the dominant processes of production of the CH(A 2 ) and Si(4s) states formed from the decomposition of TMS. The density of Ar( 3 P 0 ) atoms, n M , was measured by the laser-induced fluorescence spectroscopy of the 3 P 1  3 P 0 transition calibrated against Rayleigh scattering intensity of ground-state Ar atoms, and n e and T e were measured by electrostatic-probe measurements from which the pressure dependencies of the emission intensities were predicted and compared with the observation.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Dissociative Excitation Reaction of Tetramethylsilane with Microwave Discharge Flow of Ar

Ito

Gappa

2013

Trans. Mat. Res. Soc. Japan

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Tetramethylsilane was decomposed in the microwave discharge flow of Ar to produce emission spectra of the CH(A 2 X 2 ) and Si(4s3p) transitions. The mechanisms of the production of the excited states were studied by the combined analysis of the laser-induced fluorescence (LIF) spectroscopy of the 3 P 0 metastable state of Ar and electrostatic-probe measurements. The pressure of Ar was varied in the range of 0.2-0.4 Torr; the density of Ar( 3 P 0 ), n M , and the density, n e , and temperature, T e , of free electrons were varied. By comparing the Ar-pressure dependencies of the emission intensities, n M , n e , and T e with the support of a kinetic analysis, the production processes of CH(A 2 ) and Si(4s) states were found predominantly to be the energy transfer from the metastable state of Ar atoms.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Dissociative Excitation Reaction of Tetramethylsilane with Microwave Discharge Flow of Ar

Ito

Gappa

2013

Trans. Mat. Res. Soc. Japan

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“…C 2 Swan band system (d 3 Π g →a 3 Π u , ∆ν = 0) at 516 nm may be from the solid carbon in the residue. [18] e…”

Section: Optical Diagnostics Of Pel Processmentioning

confidence: 99%

Plasma electrolytic liquefaction of sawdust

Jiang¹,

Liu²,

Feng³

et al. 2019

Chinese Phys. B

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As a renewable carbon resource, biomass can be converted into polyols, aromatic hydrocarbons, alkanes, and other products by traditional catalytic liquefaction method, which has been widely used in production and life. The efficient development and utilization of biomass energy will play a very positive role in solving the problems of energy and ecological environment. A way of combining the plasma electrolysis with traditional catalytic liquefaction realizes the efficient liquefaction of sawdust, which provides a new liquefaction way for traditional biomass conversion. In this experiment, the effects of solution composition, catalyst content and power supply on solution resistance and liquefaction rate are analyzed. It is found that solution composition and catalyst content have a great influence on solution resistance. The results show that the liquefaction rate is highest and the resistance is smallest when the solution resistance is 500 Ω. The liquefaction rate is greatly affected by the solution temperature, and the solution temperature is determined by the output power between the two electrodes. The output power includes the heating power of the electric field and the discharge power of the plasma. We measure the electric potential field distribution in the solution and the plasma power. It is found that the output power between the two poles increases nonlinearly (from 0 to 270 W) with time. In two minutes, the electric field heating power increases from 0 to 105 W and then decreases to 70 W, while the plasma power increases from 0 to 200 W. It is well known that in the first 70 seconds of the experiment the electric field heating is dominant, and then the plasma heating turns into a main thermal source. In this paper, plasma electrolysis and traditional catalytic liquefaction are combined to achieve the efficient liquefaction of sawdust, which provides a new way for biomass liquefaction.

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“…The outline of the method used to identify the dominant active species of Ar plasma is as follows. [23][24][25][26][27][28][29][30][31] The density of Ar( 3 P 0 ) atoms, n M , is measured by the laser-induced fluorescence (LIF) spectroscopy of the 3 P 1 -3 P 0 transition whose intensity is calibrated against the Rayleigh scattering intensity of neutral Ar. The density n e and temperature T e of free electrons are measured with an electrostatic probe.…”

Section: Introductionmentioning

confidence: 99%

Production of CH(A²Δ) radicals from the dissociative excitation reaction of C₂H₂with microwave discharge flow of Ar

Ito¹,

Tsudome²

2015

Jpn. J. Appl. Phys.

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Optical emission spectra of the CH(A2Δ–X2Π) transition were observed using the dissociative excitation reaction of C2H2 with the microwave discharge flow of Ar at the pressure of Ar, PAr, in the range of 0.20–0.40 Torr. The mechanism of the production of the CH(A2Δ) state was investigated by the following two methods. The first is the comparison of the PAr dependences of the emission intensity, of the intensity of the laser-induced fluorescence spectra of the 3P1–3P0 transition of Ar, and of the density and temperature of free electrons. The second is the steady-state chemical kinetic analysis with several assumptions of the relevant reaction rate constants. It was concluded that CH(A2Δ) radicals were formed by charge transfer from Ar+ followed by ion–electron recombination with the significant contribution of the impact of free electrons. Energetic considerations revealed that the ions participating in the recombination reaction are excited vibrational levels of C2H2+.

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Production of CN(B2Σ+) state from dissociative excitation reaction of BrCN with microwave discharge flow of Ar

Cited by 9 publications

References 39 publications

Analysis of Dissociative Excitation Reaction of Tetramethylsilane with Microwave Discharge Flow of Ar

Analysis of Dissociative Excitation Reaction of Tetramethylsilane with Microwave Discharge Flow of Ar

Plasma electrolytic liquefaction of sawdust

Production of CH(A²Δ) radicals from the dissociative excitation reaction of C₂H₂with microwave discharge flow of Ar

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Production of CN(B2Σ+) state from dissociative excitation reaction of BrCN with microwave discharge flow of Ar

Cited by 9 publications

References 39 publications

Analysis of Dissociative Excitation Reaction of Tetramethylsilane with Microwave Discharge Flow of Ar

Analysis of Dissociative Excitation Reaction of Tetramethylsilane with Microwave Discharge Flow of Ar

Plasma electrolytic liquefaction of sawdust

Production of CH(A2Δ) radicals from the dissociative excitation reaction of C2H2with microwave discharge flow of Ar

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Product

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Production of CH(A²Δ) radicals from the dissociative excitation reaction of C₂H₂with microwave discharge flow of Ar