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Treatment of CCl 4 and CHCl 3 emission in a gliding-arc plasma
Indarto, Antonius,Choi, Jae-wook,Lee, Hwaung,Song, Hyung Taylor Francis 2006 Plasma devices and operations Vol.14 No.1
<P>The decomposition of the chlorinated hydrocarbons CCl 4 and CHCl 3 in a gliding-arc plasma was examined. The effects of initial concentrations, total gas flow rates and power consumption were investigated. The conversion of the hydrocarbons mentioned above was relatively high. It could reach 80% for CCl 4 and 97% for CHCl 3 . In atmospheric air as a carrier gas, the reaction was exothermic, and the main products were CO 2 , CO and Cl 2 . The transformation into CCl 4 was also detected for the decomposition reaction of CHCl 3 . The conversion of these compounds increased with increasing frequency of power supplied and decreasing total gas flow rate.</P>
Treatment of Dichloromethane Using Gliding Arc Plasma
Indarto, Antonius,Choi, Jae-Wook,Lee, Hwaung,Keun Song, Hyung Taylor and Francis 2006 INTERNATIONAL JOURNAL OF GREEN ENERGY Vol.3 No.3
<P>Decomposition of dichloromethane (CH<SUB>2</SUB>Cl<SUB>2</SUB>) using a gliding plasma was examined and reported in this paper. The effects of initial concentrations of CH<SUB>2</SUB>Cl<SUB>2</SUB>, total gas flow rates, and input frequency have been studied to evaluate the performance of gliding arc on CH<SUB>2</SUB>Cl<SUB>2</SUB> decomposition. Using atmospheric pressure air as the carrier gas, experimental results indicate that the maximum conversion of CH<SUB>2</SUB>Cl<SUB>2</SUB> was 95.1% at a total gas flow rate of 180 L/hr containing 1% by volume of CH<SUB>2</SUB>Cl<SUB>2</SUB>. The reaction occurred at an exothermic condition and gaseous products are dominated by CO, CHCl<SUB>3</SUB>, and Cl<SUB>2</SUB>. CO<SUB>2</SUB> and CCl<SUB>4</SUB> are also detected in the product stream in small amounts. The conversion of CH<SUB>2</SUB>Cl<SUB>2</SUB> increases with the increasing applied voltage and decreasing total gas flow rate.</P>
P-607 : Methane conversion using gliding arc discharge
( Antonius Indarto ),송형근,최재욱,이화웅 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2
A study of methane conversion using gliding arc discharge was performed. The main products of reaction were Carbon (C-solid), H2, and, C2H2. The effects of input frequency, power, total flow rate, and CH4/additive gas ratio on conversion and product selectivity were investigated. Methane conversion was enhanced with increasing input power, frequency and decreasing the total gas flow rate. Addictive gas, such as argon and helium, has a great effect on methane conversion and product selectivity. Decreasing ratio of methane gas has increased the methane conversion 47.83% to 61.2% and H2 selectivity 43.67% to 67.5% but decreasing the acetylene (C2H2) selectivity from 27.32% to 11.44%.
Gliding Arc Plasma Processing for Chloromethane Decomposition
( Antonius Indarto ),최재욱,이화웅,송형근 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
Chlorinated volatile organic compounds play an important role in the chemical industry both as reaction intermediates and final products. The increasing amounts of chlorinated VOCs released into the environment, together with their suspected toxicity and carcinogenic properties, have increased the demand for finding effective methods of destruction. In order to get high decomposition performance of chloromethane compounds (such as: CH2Cl2, CH3Cl, and CCl4), gliding discharge plasma was used as attractive method due to producing high quality of radical species. The decomposition performance was studied relating to various concentrations of chloromethane, total gas flowrate, and power consumption. 0.5 L quartz cylindrical reactor, with two stainless steel plateselectrode, and high voltage AC power supply were used to achieve the goal of this study. For CCl4 decomposition, it reached 80% (1% of CCl4 at total flowrate 3 lpm) and the main products were Cl2 (selectivity ~77%), CO, and CO2. Conversion of CHCl3 reached 97% at 1% of CHCl3 and total flowrate 3 lpm. The main products were Cl2, CCl2O, CO2 and CO. And, for CH2Cl2, the conversion reached 90% at 2.5% of CH2Cl2 and total flowrate 5 lpm.
CCL4 DECOMPOSITION BY GLIDING ARC PLASMA: ROLE OF C2 COMPOUNDS ON PRODUCTS DISTRIBUTION
Indarto, Antonius,Yang, Dae Ryook,Choi, Jae-Wook,Lee, Hwaung,Song, Hyung Keun Taylor Francis 2007 Chemical engineering communications Vol.194 No.8
<P> The goal of this work is to investigate the role of existing C2 compounds in the plasma reactions of carbon tetrachloride (CCl4) decomposition. The experiment of CCl4 decomposition was carried out by gliding arc plasma. The decomposition products were dominated by CO, CO2, and Cl2. The conversion of CCl4 into Cl2 and (CO + CO2) reaches ∼ 50% and ∼ 40%, respectively. Other chlorinated compounds were suspected to be produced, such as COCl, COCl2, and C2 compounds. In order to prove the existence of those compounds, for example, chlorinated C2 compounds, a kinetic simulation was performed and cross-checked with the experimental results to clarify the reactions mechanism.</P>
Aromatic Formation from Vinyl Radical and Acetylene. A Mechanistic Study
Natalia, Debby,Indarto, Antonius Korean Chemical Society 2008 Bulletin of the Korean Chemical Society Vol.29 No.2
The viability of acetylene addition in each step of aromatic formation initiated by vinyl radical and acetylene also with its competition with structure rearrangement is investigated by determining optimal geometries and barrier and reaction energies using quantum mechanical methods. In principle, the addition reaction has more difficult in term of free energy and enthalpy compared to geometry arrangement. Under combustion conditions, i.e. T = 1200 K, acetylene addition is unfavorable mechanism as the barrier energy values rise much higher than that of geometry arrangement. However, in longer chain hydrocarbon case, e.g. n-CxHx+1 where x ³ 8, C-C bond rotation is rather difficult and requires high energy to form a ring structure, elongation chain is preferable.