Numerical analysis on a thermal plasma reactor for HFC-23 treatment

Choi, Sunghoon; Cho, Kyu Young; Woo, Joo Man; Lim, JongChoo; Lee, Joong Kee

doi:10.1016/j.cap.2011.05.008

Cited by 9 publications

(6 citation statements)

References 19 publications

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“…From the numerical simulation, it is obtained that the major factors of the thermal decomposition process such as distributions of temperature, velocity, and each species in the decomposition reactor [26,32,33]. The numerical simulation is divided into two steps according to the existence or absence of the arc column inside the computational domain as shown in Fig.…”

Section: Numerical Analysis On Thermal Plasma Flowmentioning

confidence: 99%

“…The melting point of reaction tubes made of Inconel metal is known to be 1,600 ~ 1,700 K, and it was required from the numerical results that along gap distance between the reactor inlet and the outer reaction tube was required to prevent melting of the inner reaction tube. By taking advantage of the results of numerical analysis, high DRE of HFC-23 was achieved without thermal damage of the reactor in the thermal plasma decomposition system [32]. Numerical analysis is essentially required to understand complex thermal flow and to find out optimal operation and design conditions in the thermal plasma gas decomposition system because development of thermal plasma system based on a trial and error method dissipates much time and cost.…”

Section: Numerical Analysis On Thermal Plasma Flowmentioning

confidence: 99%

“…Instead of chemical catalyst, atmospheric pressure nonequilibrium plasma, and combustion methods, adoption of the thermal plasma method is gradually increasing to decompose fluorinated compounds in recent years [24][25][26][27][28][29][30][31][32][33]. Thermal plasma technology for waste treatment including destruction of fluorinated compounds has received a great deal of attention to meet the contemporary needs of solving problems with increasing environmental pollution and their restrictions to be followed [34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal Plasma Decomposition of Fluorinated Greenhouse Gases

Choi¹,

Park²,

Watanabe³

2012

Nuclear Engineering and Technology

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Section: Numerical Analysis On Thermal Plasma Flowmentioning

confidence: 99%

Section: Numerical Analysis On Thermal Plasma Flowmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Plasma Decomposition of Fluorinated Greenhouse Gases

Choi¹,

Park²,

Watanabe³

2012

Nuclear Engineering and Technology

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“…In the simulation of non-transferred arc plasma, steady state, local thermal equilibrium (LTE) [17], the turbulence standard k-epsilon model, and the optically thin net emission coefficient (NEC) are assumed [20]. The simulation was performed using a self-developed magnetohydrodynamics (MHD) code [12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Section: Numerical Simulation Methods For the Arc Plasma Reactormentioning

confidence: 99%

“…Gas pyrolysis conversion using ultra-high temperature thermal plasma jets has been studied to apply various gas treatments, as well as methane conversion, PFCs (perfluorocompounds) and HFCs (hydrofluorocarbons) [13,14]. Among them, despite their high thermal environments over 10 000 K, there were two serious problems in the methane pyrolysis process for natural gas.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of a low power non-transferred arc plasma reactor for methane conversion

Min

Dinh

Lee

et al. 2019

Plasma Sci. Technol.

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Thermal flow characteristics and the methane conversion reaction in a low power arc plasma reactor for efficient storage and transport of methane, which is the main component of shale gas, were simulated. The temperature and velocity distributions were calculated according to the type of discharge gases and arc current level by a self-developed magnetohydrodynamics (MHD) code and a commercial ANSYS-FLUENT code; the transport of chemical species was analyzed as including the chemical reactions of methane conversion. The simulated results were verified by the comparison of calculated and measured arc voltages with permissible low error as under 4%. Three C2 hydrocarbon gases with ethane (C 2 H 6 ), ethylene (C 2 H 4 ), and acetylene (C 2 H 2 ) were selected as the converted species of methane from experimental data. The mass fraction of C2 hydrocarbons and hydrogen as the product of the conversion reaction at the reactor was also calculated. Those values show good agreement with the actual experimental results in that the major conversion reaction occurred in C 2 H 2 and hydrogen, and the conversions to C 2 H 6 , C 2 H 4 , and hydrogen were minor reactions of methane pyrolysis conversion.

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Process conditions for complete decomposition of CHF3 in a dielectric barrier discharge reactor

Nguyen

Lee

2016

Korean J. Chem. Eng.

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Plasma decomposition of CHF 3 was investigated using a dielectric barrier discharge immersed in an electrically insulating oil bath in a mixture of CHF 3 , O 2 , and N 2 . CHF 3 was well decomposed under a relatively high applied voltage in an atmospheric pressure plasma system. The main by-product was CO 2 and its selectivity increased with a decrease in the CHF 3 concentration in the feed. Complete decomposition of CHF 3 was achieved at a typical process range: an applied voltage ≥ 7.0 kVp, an initial CHF 3 flow rate of 3 ml/min, and a total flow rate of 500 ml/min. The value of energy efficiency and energy density at the center range for the complete decomposition of CHF 3 was 0.01 mmol/kJ and 6.00 kWh/Nm 3 , respectively.

show abstract

Numerical analysis on a thermal plasma reactor for HFC-23 treatment

Cited by 9 publications

References 19 publications

Thermal Plasma Decomposition of Fluorinated Greenhouse Gases

Thermal Plasma Decomposition of Fluorinated Greenhouse Gases

Numerical modelling of a low power non-transferred arc plasma reactor for methane conversion

Process conditions for complete decomposition of CHF3 in a dielectric barrier discharge reactor

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