Title Page
Abstract
Contents
Chapter 1. Introduction 16
1.1. Background of Dielectric Barrier Discharge Plasma 16
1.2. Technologies of Treatment for Volatile Organic Compounds 19
1.3. Objective s and Research Approach 24
Chapter 2. Advanced DBD Reactor 26
2.1. Materials and Methods 26
2.1.1. Experimental Apparatus 26
2.1.2. Detail of Advanced DBD Reactor 28
2.1.3. Experimental Methods and Analysis Methods 31
2.2. Results and Discussion 34
2.2.1. Discharge Characteristics of Segmented Electrode 34
2.2.2. Ozone Production Ability 41
2.3. Summary 44
Chapter 3. Effect of Exposed Surface Area 45
3.1. Materials and Methods 45
3.1.1. Experimental Apparatus 45
3.1.2. Experimental Methods and Conditions 47
3.1.3. Assumptions 51
3.2. Results and Discussion 52
3.2.1. Effect of Exposed Surface Area in Decomposition of Adsorbed Heptane 52
3.3. Summary 57
Chapter 4. Comparison of Decomposition Mechanisms between Toluene and Heptane 58
4.1. Materials and Methods 58
4.1.1. Experimental Apparatus 58
4.1.2. Experimental Methods and Conditions 60
4.2. Results and Discussions 63
4.2.1. Mineralization & CO₂ Selectivity 63
4.2.2. Ozone Consumption 70
4.2.3. Organic Intermediates 73
4.2.4. Mechanisms 80
4.2.5. Energy Yield 82
4.3. Summary 84
Chapter 5. Effect of Power Supply Source and Reaction Temperature 85
5.1. Materials and Methods 85
5.1.1. Experimental Apparatus 85
5.1.2. Experimental Method and Conditions 89
5.2. Results and Discussion 93
5.2.1. Comparison of Light Intensity and Ozone Production Ability 93
5.2.2. Effect on Decomposition Reaction 95
5.3. summary 105
Chapter 6. Conclusions 107
References 111
Abstract in Korean[내용누락;p.113] 127
Table 2.1. Characteristics of the y-type zeolite. 30
Table 2.2. Experimental conditions in Chapter 2. 32
Table 3.1. Experimental conditions in Chapter 3. 50
Table 4.1. Experimental conditions in Chapter 4. 62
Table 5.1. Experimental conditions in Chapter 5. 92
Figure 1.1. Plasma IV curve. 18
Figure 2.1. Schematic diagram of overall experimental apparatus in Chapter 2. 27
Figure 2.2. DBD plasma reactor having the segmented electrode; (a) reactor... 29
Figure 2.3. Lissajous figure at each applied voltage in each reactor. 33
Figure 2.4. Waveform of plasma current in each reactor at 16 kV; a) reactor... 35
Figure 2.5. SED of each reactor as a function of the applied voltage. 37
Figure 2.6. Relative intensity of the brightest peak (342.6 nm) of the second... 39
Figure 2.7. Second positive system of the nitrogen molecule in reactor 3 at... 40
Figure 2.8. Ozone concentration produced by each reactor at each applied voltage. 43
Figure 3.1. Schematic diagram of overall experimental apparatus in Chapter 3. 46
Figure 3.2. Adsorption curve of heptane as a function of the amount of... 49
Figure 3.3. Adsorption amount of heptane as a function of the amount of zeolite. 55
Figure 3.4. Volume of CO and CO₂ generated after full adsorption. 55
Figure 3.5. Ozone consumption; adsorption amount of* column: 0.242 mmol. 56
Figure 3.6. Energy yield as a function of the amount of zeolite; adsorption... 56
Figure 4.1. Schematic diagram of overall experimental apparatus in Chapter 4. 59
Figure 4.2. Mineralization of toluene and heptane decomposition in each... 64
Figure 4.3. CO₂ selectivity of toluene and heptane decomposition in each... 68
Figure 4.4. Plots of CO and CO₂ concentration in each reactor at 15 kV; a)... 69
Figure 4.5. Ozone consumption of toluene and heptane decomposition; a)... 72
Figure 4.6. Gas chromatograms indicating peak of heptane remained in... 75
Figure 4.7. Gas chromatogram indicating organic intermediates of heptane... 76
Figure 4.8. Gas chromatogram indicating organic intermediates of toluene... 77
Figure 4.9. Gas chromatogram indicating organic intermediates of heptane... 78
Figure 4.10. Gas chromatogram indicating organic intermediates of heptane... 79
Figure 4.11. Energy yield as a function of SED (solid: toluene... 83
Figure 5.1. Schematic diagram of overall experimental apparatus in Chapter... 87
Figure 5.2. Detail drawing of DBD reactor. 88
Figure 5.3. Applied voltage measure by oscilloscope; (a) DCNP, (b) ACHV. 91
Figure 5.4. Second positive system of nitrogen molecule analyzed by OES... 94
Figure 5.5. Ozone production ability in each power system at different temperatures. 94
Figure 5.6. Mineralization of each power supply as a function of the... 96
Figure 5.7. The amount of benzene remaining on the zeolite after plasma... 98
Figure 5.8. Peak of benzene remaining after discharge process in each power... 98
Figure 5.9. CO₂ selectivity of each power supply as a function of the... 100
Figure 5.10. Consumption amount and un-consumption amount in each... 102
Figure 5.11. Energy yield as a function of the reaction temperature. 104