Pyrolysis of some gaseous and liquid hydrocarbons in hydrogen plasma

Beiers, Heinz-Georg; Baumann, Herbert; Bittner, D.; Klein, Jürgen; Jüntgen, H.

doi:10.1016/0016-2361(88)90104-4

Cited by 37 publications

(20 citation statements)

References 13 publications

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“…In the process of coal pyrolysis in plasma, the mass and heat transfer between the particle and gas is the rate-limiting step Beiers et al, 1988). It is assumed that once the volatile is released into the gas phase the reaction rate is determined by the mixing of the mass from coal and the hot hydrogen.…”

Section: Gaseous Turbulent Reactionmentioning

confidence: 99%

Process Development and Reactor Analysis of Coal Pyrolysis to Acetylene in Hydrogen Plasma Reactor

Chen

Cheng

2009

J. Chem. Eng. Japan

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Section: Gaseous Turbulent Reactionmentioning

confidence: 99%

Process Development and Reactor Analysis of Coal Pyrolysis to Acetylene in Hydrogen Plasma Reactor

Chen

Cheng

2009

J. Chem. Eng. Japan

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“…Yan et al [6] investigated the pyrolysis of some liquid hydrocarbons in H 2 /Ar plasma. Beiers et al [26] investigated the pyrolysis of some gaseous and liquid hydrocarbons in hydrogen plasma, such as cyclohexane, benzene, toluene, coal oil and anthracite oil.…”

Section: Introductionmentioning

confidence: 99%

Hydropyrolysis of n-Hexane and Toluene to Acetylene in Rotating-Arc Plasma

Zhang

et al. 2017

Energies

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Thermal plasma pyrolysis is a powerful technology for converting waste or low-value materials to valuable gaseous hydrocarbons. This paper presents for the first time the hydropyrolysis of n-hexane and toluene in a rotating-arc plasma reactor. Effects of the mole ratio of H/C in the feed, power input and magnetic induction were investigated to evaluate the reaction performance. A lower H/C ratio could lead to a lower yield of C 2 H 2 and lower specific energy consumption, and there existed an optimum range of power input for both n-hexane and toluene pyrolysis within the investigated range. The yield of C 2 H 2 in n-hexane and toluene pyrolysis could reach 85% and 68%, respectively, with respective specific energy consumption (SEC) of 13.8 kWh/kg·C 2 H 2 and 19.9 kWh/kg·C 2 H 2 . Compared with the results reported in literature, the rotating-arc plasma process showed higher C 2 H 2 yield and lower energy consumption, which is attributed to the better initial mixing of the reactant with the hot plasma gas and the more uniform temperature distribution.

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“…On the contrary, CH 4 content in the product ascended from 10.1% to 15.2% although the CH 4 content in the feed gas was slightly reduced when adding CO 2 . This is probably because when the CO 2 content increased, the pyrolysis of CO 2 to CO and O· radicals consume a great deal of input energy, which restricted the conversion of CH 4 by either Equation (8) or Equation (9).…”

Section: Effect Of Nitrogen/oxygen Substances On Methane Pyrolysismentioning

confidence: 99%

“…As can be seen from the figure, with the increase in CO2 content, the mole fraction of C2H2 reduced from 8.4% to 6.3% and C2H4 concentration reduced slightly from 0.61% to 0.31%. This is mainly ascribed to a competitive relationship between the oxygen-free pyrolysis reactions in Equation (8) and oxidation reaction in Equation (9), and the oxidation reaction hindered the dominant pyrolysis reactions that produce C2H2. This is also supported by the result that increasing CO2 content in the feed gas improved the CO content in the product.…”

Section: Effect Of Co2 On Methane Pyrolysismentioning

confidence: 99%

“…However, because CO2, N2, and CO may also decompose in the atmosphere and react with the intermediate product of alkane pyrolysis in Equation (8), their presence in alkane-rich feed gas is expected to influence the pyrolysis products. To clarify the effect of each of them, CO2, N2, and CO were respectively mixed into methane (as a representative alkane) to serve as a binary feed gas for pyrolysis.…”

Section: Effect Of Nitrogen/oxygen Substances On Methane Pyrolysismentioning

confidence: 99%

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Effect of Nitrogen/Oxygen Substances on the Pyrolysis of Alkane-Rich Gases to Acetylene by Thermal Plasma

et al. 2018

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Abstract:It is important to convert alkane-rich gases, such as coke oven gas, to value-added chemicals rather than direct emission or combustion. Abundant nitrogen/oxygen substances are present in the actual alkane-rich gases. However, the research about how they influence the conversion in the pyrolysis process is missing. In this work, a systematic investigation on the effect of various nitrogen/oxygen-containing substances, including N 2 , CO, and CO 2 ,on the pyrolysis of CH 4 to C 2 H 2 was performed by a self-made 50 kW rotating arc thermal plasma reactor, and the pyrolysis of a simulated coke oven gas as a model of alkane-rich mixing gas was conducted as well. It was found that the presence of N 2 and CO 2 was not conducive to the main reaction of alkane pyrolysis for C 2 H 2 , while CO, as a stable equilibrium product, had little effect on the cracking reaction. Consequently, it is suggested that a pretreatment process of removing N 2 and CO 2 should be present before pyrolysis. Both input power and feed rate had considerable effect on the pyrolysis of the simulated coke oven gas, and a C 2 H 2 selectivity of 91.2% and a yield of 68.3% could be obtained at an input power of 17.9 kW.

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Pyrolysis of some gaseous and liquid hydrocarbons in hydrogen plasma

Cited by 37 publications

References 13 publications

Process Development and Reactor Analysis of Coal Pyrolysis to Acetylene in Hydrogen Plasma Reactor

Process Development and Reactor Analysis of Coal Pyrolysis to Acetylene in Hydrogen Plasma Reactor

Hydropyrolysis of n-Hexane and Toluene to Acetylene in Rotating-Arc Plasma

Effect of Nitrogen/Oxygen Substances on the Pyrolysis of Alkane-Rich Gases to Acetylene by Thermal Plasma

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