窒素非熱プラズマを用いたNOx還元と吸着剤の再生?ディーゼルエンジン排出ガス処理を目的とした各種反応器の性能比較

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⺰

⓸⚛㕖ᾲࡊ࡜࠭ࡑࠍ↪޿ߚ

NOx ㆶరߣๆ⌕೷ߩౣ↢

㧙࠺ࠖ࡯࠯࡞ࠛࡦࠫࡦឃ಴ࠟࠬಣℂࠍ⋡⊛ߣߒߚฦ⒳෻ᔕེߩᕈ⢻Ყセ㧙

ศ ↰ ᕺ৻㇢

㧖,1

_{㧘ᄢਭ଻ 㓷 ┨}

㧖

_{㧘㤥 ᧁ ᥓ ਯ}

㧖

_{㧘ጊ ᧄ ବ ᤘ}

㧖

㧔2006 ᐕ 3 ᦬ 2 ᣣฃઃ㧘2006 ᐕ 10 ᦬ 26 ᣣฃℂ㧕

NOx Reduction and Regeneration of Adsorbent

Using N

2

Nonthermal Plasma

㧙

Comparison of Various Types of Reactors toward the Treatment of Diesel Engine Exhaust Gas㧙

Keiichiro YOSHIDA,*

, 1

_{Masaaki OKUBO,* Tomoyuki KUROKI* and Toshiaki YAMAMOTO*}

(Received March 2, 2006; Accepted October 26, 2006)

Comparison of performance among various types of nonthermal plasma reactors was carried out in order to realize

diesel emission aftertreatment system using our proposed nitrogen nonthermal plasma desorption㧚It was shown that

the surface discharge reactor and the packed-bed reactor have higher NOx reduction capabilities than the pulse

powered wire-cylinder reactor. It was suggested that low cost exhaust treatment system was possible by using AC

power supply. It was also clarified that the pulse powered wire-cylinder reactor was the most effective reactor for

regeneration of NO zeorite adsorbent of molecular sieve 13X.

1. ߪߓ߼ߦ ⥄േゞ㧘ᑪ⸳ᯏ᪾㧘⊒㔚ᯏ㧘⦁⥾ߦᐢߊ૶↪ߐࠇࠆ࠺ࠖ࡯ ࠯࡞ࠛࡦࠫࡦߪ㜞޿ᾲല₸ߩߚ߼㧘CO2ឃ಴೥ᷫߦലᨐ⊛ߢ ޽ࠆ㧚ߒ߆ߒ㧘ߘߩឃ಴ࠟࠬਛߦ฽߹ࠇࠆ⓸⚛㉄ൻ‛㧔ᧄ⺰ ᢥߢߪNOx = NO + NO2ߣߔࠆ㧕ߪⅣႺᳪᨴߩේ࿃ߣߥࠆ㧚 ߒߚ߇ߞߡ㧘NOx ࠍήኂߥ N2ߣO2ߦㆶర㧘ಽ⸃ߔࠆᔅⷐ߇ ޽ࠆ߇㧘᜛ᢔΆ὾ࠛࡦࠫࡦߩᕈ⾰਄㧘ឃ಴ࠟࠬߦ10 %⒟ᐲߩ ㉄⚛ࠍ฽߻ߚ߼㧘ㆶర෻ᔕߪ㕖Ᏹߦ࿎㔍ߢ޽ࠆ㧚⃻࿷㧘㉄ൻ ⸅ᇦ߿ឃ಴ࠟࠬਛߢ⊒↢ߐߖߚ㕖ᾲࡊ࡜࠭ࡑ 1-8)ࠍ↪޿ߡ㧘 NO ࠍ NO2ߦ㉄ൻߒߚᓟ㧘ዩ⚛᳓㧘ࠕࡦࡕ࠾ࠕ߿὇ൻ᳓⚛ࠍ ㆶర೷ߣߒߡᷝടߒ㧘ㆶర⸅ᇦߦࠃߞߡNO2ࠍN2ߣO2ߦಽ ⸃ߔࠆㆬᛯ⸅ᇦㆶరᴺ㧔SCR㧕9-14) _{߇⎇ⓥߐࠇߡ޿ࠆ㧚ߒ߆} ߒ㧘ߎߩᚻᴺߪㆶర೷ࠍ៞タߔࠆᔅⷐ߇޽ࠅ㧘߹ߚ㧘⸅ᇦഠ ൻ㧘ࠕࡦࡕ࠾࠙ࡓᓸ☸ሶ⊒↢߿⸅ᇦ㊀㊄ዻᵹ಴ߥߤߩ໧㗴ߩ ߚ߼㧘ቢోߦḩ⿷ߢ߈ࠆᵺൻᚻᲑߢߪߥ޿㧚 ৻ᣇ㧘⓸⚛㔓࿐᳇ߢ⊒↢ߐߖߚ㕖ᾲࡊ࡜࠭ࡑ㧔⓸⚛㕖ᾲࡊ ࡜࠭ࡑ㧕ߦࠃߞߡ NOx ࠍㆶరߢ߈ࠆߎߣ߇ࠊ߆ߞߡ޿ࠆ㧚 ⪺⠪ࠄߪ㧘NOx ಣℂᴺߣߒߡ NOx ࠍ৻ᣤ㧘ๆ⌕೷ߦๆ⌕ߐ ߖ㧘ๆ⌕೷ߩౣ↢㧘⣕⌕ߒߚNO ߩಽ⸃ࠍ⓸⚛㕖ᾲࡊ࡜࠭ࡑ ߦࠃߞߡⴕ߁ᣇᴺࠍឭ᩺ߒߡ޿ࠆ15-18)㧚NOx ࠍ৻ᣤๆ⌕೷ߦ ๆ⌕ߔࠆߎߣߢ㧘Ớ❗ߐࠇߚ⁁ᘒߢ NOx ߩൻቇ෻ᔕࠍㅴ߼ ࠄࠇࠆߚ߼㧘ᶖ⾌ࠛࡀ࡞ࠡ࡯ࠍ▵⚂ߢ߈ࠆ㧚߹ߚ㧘⣕⌕ߦ⓸ ⚛㕖ᾲࡊ࡜࠭ࡑࠍ૶߁ߎߣߢๆ⌕߆ࠄㆶర߹ߢࠍන৻ߩⵝ ⟎ߢታ⃻ߢ߈ࠆ㧚ߎߩߎߣߪߔߢߦේℂ⊛ߦታ⃻ߢ߈ࠆߎߣ ࠍႎ๔ߒߡ޿ࠆ15-17)㧚ߎߩᣇᴺߢߪ㧘⓸⚛㔓࿐᳇ߪPSA㧔࿶ ജࠬࠗࡦࠣๆ⌕㧕ⵝ⟎߿ࡐ࡝ࠗࡒ࠼ㆬᛯㅘㆊ⤑ߥߤࠍ↪޿ߡ㧘 ૞ࠅ಴ߔߎߣ߇ߢ߈ࠆߒ㧘ή⸅ᇦߢࠕࡦࡕ࠾ࠕ߽૶↪ߒߥ޿ ߩߢ೨⸥ߩࠃ߁ߥ໧㗴ߪߥ޿㧚 ߚߛߒ㧘ᣢႎ15, 17-18)ߢߪ㧘ᦨ߽න⚐ߥࡢࠗࡗ㧙౞╴ဳ෻ᔕ ེߣ㧘㜞ଔߥࡄ࡞ࠬ㔚Ḯࠍ↪޿ߚࡄ࡞ࠬࠦࡠ࠽᡼㔚ߦࠃࠆ NOx ㆶరࠍⴕߞߡ޿ࠆ㧚ታ↪ൻߩߚ߼ߦߪ㧘⇣ߥࠆᒻᘒߩ෻ ᔕེߣߩᲧセ߿㧘ࠃࠅ቟ଔߥAC 㜞࿶㔚Ḯࠍ↪޿ߚታ㛎⚿ᨐ ߇ᦸ߹ࠇࠆ㧚ߘߎߢ㧘ᧄ⎇ⓥߢߪ㧘ᣢႎ15, 17-18)߹ߢߢ㧘ᕈ⢻ ߩ᣿ࠄ߆ߥࡢࠗࡗ㧙౞╴ဳ෻ᔕེࠍၮᧄߣߒ㧘ߎࠇߦ⺃㔚૕ ࠍ㈩ߒߚ෻ᔕེ㧘߅ࠃ߮ᴪ㕙᡼㔚ဳ෻ᔕེߩ⓸⚛㔓࿐᳇ਅߢ ߩ NOx ㆶరᕈ⢻ߣๆ⌕೷ߩౣ↢ᕈ⢻ࠍᲧセߔࠆ㧚ߎࠇߦࠃ ߞߡ㧘ታ↪ൻ㧘ࠬࠤ࡯࡞ࠕ࠶ࡊߩߚ߼ߩၮ␆࠺࡯࠲ߩ৻ߟߣ ߔࠆ㧚 ࠠ࡯ࡢ࡯࠼㧦⓸⚛㉄ൻ‛㧘৻㉄ൻ⓸⚛㧘⓸⚛㕖ᾲࡊ࡜࠭ࡑ㧘 ૐ᷷ࡊ࡜࠭ࡑ㧘ๆ⌕೷ౣ↢㧚 * ᄢ㒋ᐭ┙ᄢቇᄢቇ㒮Ꮏቇ⎇ⓥ⑼ᯏ᪾♽ኾ᡹ᯏ᪾Ꮏቇಽ㊁㧔599-8531 ᄢ㒋ᐭ႓Ꮢቇ࿦↸ 1-1㧕

Department of Mechanical Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, JAPAN㧚

1_{[email protected]}

, 30, 6 (2006) 284 290 J. Inst. Electrostat. Jpn.

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2. ታ㛎ⵝ⟎߅ࠃ߮ᣇᴺ 2.1 ฦ⒳෻ᔕེߣශട㔚࿶ᵄᒻ ࿑1㧔a㧕㨪㧔c㧕ߦ NOx ㆶరߦ↪޿ࠆࡊ࡜࠭ࡑ෻ᔕེࠍ␜ ߔ㧚࿑ 1㧔a㧕ߪࡢࠗࡗ㧙౞╴ဳ෻ᔕེ㧔A㨪C㧕ߢ޽ࠆ㧚A 㨪C ߪᄖ⋥ᓘ 24 mm㧘ౝ⋥ᓘ 21.5 mm ߩ⍹⧷▤ߣI2 mm ߩࠬ ࠹ࡦ࡟ࠬ᡼㔚✢㧘▤⴫㕙ߦኒ⌕ߐߖߚࠕ࡞ࡒ▗ߩኻะ㔚ᭂ߆ ࠄߥࠆ㧚෻ᔕེA ߩ㔚ᭂ᦭ല㐳㧔L㧕ߪ 50 mm㧘B ߪ 100 mm ߢ޽ࠆ㧚෻ᔕེC ߪ L=50 mm ߢ޽ࠅ㧘ౝ㕙ߦੑ㉄ൻ࠴࠲ࡦ 㧔TiO2㧕ಽᢔᶧ㧔⍹ේ↥ᬺ⵾㧘TiO2ಽᢔ㊂0.2 wt%㧘ST-K211㧕 5 mL ࠍႣᏓᓟ㧘90 ͠ߢੇ῎ߐߖߡ TiO2⤑ࠍᒻᚑߔࠆ㧚TiO2 ⤑ߩෘߐߪ⚂0.7 Pm ߢ޽ߞߚ㧚෻ᔕེ C ߦࠃߞߡ㧘⭯޿⺃㔚૕ጀߦࠃࠆ㔚⩄ߩ⫾Ⓧ߇ᕈ⢻ߦᓇ㗀ࠍ෸߷ߔ߆㧘߹ߚ૗ࠄ ߆ߩ⸅ᇦലᨐ߇⷗ࠄࠇࠆ߆ࠍ⺞ߴࠆ㧚 ࿑1㧔b㧕ߩ෻ᔕེ D㨪G ߪ⺃㔚૕ࡍ࡟࠶࠻ࠍࡢࠗࡗ㧙౞╴ ဳ෻ᔕེA㧔ᄖ⋥ᓘ 24 mm㧘ౝ⋥ᓘ 21.5 mm㧘L=50 mm㧕ౝ ߦ㈩ߒߚ߽ߩߢ޽ࠆ㧚D㧘E ߪࡍ࡟࠶࠻లႯဳ㧘F㧘G ߪ▤ౝ 㕙ߦࡍ࡟࠶࠻ࠍࠪ࡝ࠞ࡮ࠫ࡞ࠦ࠾ࠕࡍ࡯ࠬ࠻㧔᧲੟วᚑ⵾㧘 ࠕࡠࡦ࠮࡜ࡒ࠶ࠢE㧕ࠍ↪޿ߡ㧘1 ጀߦ࿕ቯߒߡ߅ࠅ㧘ࡍ࡟ ࠶࠻ࠦ࡯࠻ဳߣ๭߱㧚෻ᔕེD ߦలႯߔࠆࡍ࡟࠶࠻ߪ⋥ᓘ 3 mm ߩ࠴࠲ࡦ㉄ࡃ࡝࠙ࡓ㧔ን჻࠴࠲ࡦ⵾㧘BaTiO3㧘Ყ⺃㔚₸ Hr=5,000㧕㧘E ߦߪ⋥ᓘ 3 mm ߩੑ㉄ൻ࠴࠲ࡦࡍ࡟࠶࠻㧔ࠛࠬ ࡢࠗࠛࠬࡑࠪ࠽࡝࡯⵾㧘นⷞశ↪శ⸅ᇦ㧘Hr=70㨪100㧕ࠍల Ⴏߔࠆ㧚ࡍ࡟࠶࠻ࠦ࡯࠻ဳF㧘G ߦߪߘࠇߙࠇ㧘⋥ᓘ 3 mm㧘 1 mm ߩ BaTiO3ࡍ࡟࠶࠻ࠍ࿕ቯߔࠆ㧚ߎࠇߪ㧘ࡍ࡟࠶࠻లႯ ဳߩᰳὐߩ৻ߟߣߒߡᓥ᧪߆ࠄᜰ៰ߐࠇߡ޿ࠆ࿶ജ៊ᄬࠍ ૐᷫߔࠆ⋡⊛ߢ૞⵾ߒߚ㧚 ࿑1㧔c㧕ߦ␜ߔ෻ᔕེ H ߪᴪ㕙᡼㔚ဳ෻ᔕེߢ޽ࠆ㧚⋥ᓘ 13 mm㧘㐳ߐ 83 mm ߩ᡼㔚⚛ሶ㧔Ⴧ↰⎇ⓥᚲ⵾㧘OC-002㧕߇㧘 ౝᓘ17 mm ߩࠕ࡞ࡒ࠾࠙ࡓ⵾ኈེߦ෼⚊ߐࠇߡ߅ࠅ㧘෻ᔕࠟ ࠬߪኈེౝ㕙ߣ⚛ሶߩ㓗㑆ࠍㅢࠆ㧚᡼㔚⚛ሶߪਅ┵߇㐽ߓࠄ ࠇߚౝᓘ8 mm㧘ᄖᓘ 13 mm ߩࠕ࡞ࡒ࠽࠮࡜ࡒ࠶ࠢ▤ߢ޽ࠅ㧘 ▤ოౝㇱߦ㜞࿶㔚ᭂ߇ၒ⸳ߐࠇ㧘ᄖ⴫㕙ߦធ࿾஥ߩ㔚ᭂࡄ࠲ ࡯ࡦ߇⸳ߌࠄࠇߡ޿ࠆ㧚⓸⚛㕖ᾲࡊ࡜࠭ࡑߪᄖ⴫㕙ߢ⊒↢ߔ ࠆ㧚 ࿑ 2㧔a㧕㨪㧔c㧕ߦ෻ᔕེߦශടߔࠆ㜞㔚࿶ᵄᒻࠍ␜ߔ㧚 ࿑2㧔a㧕ߪ L=50 mm ߩࡢࠗࡗ㧙౞╴ဳ A ߩߺߦශടߔࠆࡄ ࡞ࠬᵄߢ޽ࠅ㧘㜞࿶ࡄ࡞ࠬ㔚Ḯ㧔Ⴧ↰⎇ⓥᚲ⵾㧘PPCP Pulser Quartz Tube I21.5 mm 50 mm

Teflon mesh _{I21.5 mm} 50 mm

D: I3-BaTiO3

E: I3-TiO2

F: I3-BaTiO3

G: I1-BaTiO3

Packed-bed type Pellet-coated type

࿑1㧔b㧕 ෻ᔕེ D㨪G㧔ࡍ࡟࠶࠻లႯဳ㧘ࡍ࡟࠶࠻ࠦ࡯࠻ဳ㧕

Fig. 1 (b) Reactors D~G (Packed-bed type and pellet-coated type).

a a’ a-a’ Aluminum sphere discharge rod Quartz Tube Ground electrode I21.5 mm L Gas inlet Gas outlet _{A, C: L=50 mm} B: L=100 mm Teflon spacer ࿑1㧔a㧕 ෻ᔕེ A㨪C㧔ࡢࠗࡗ㧙౞╴ဳ㧘

Fig. 1 (a) Reactors A~C (Wire-cylinder type,

Silicone bush

Stainless steel (I2 mm)

TiO2layer (Reactor C)

෻ᔕེC ߩߺ▤ౝ㕙ߦ TiO2⤑ࠦ࡯࠹ࠖࡦࠣ㧕

Reactor C has inner surface coated with TiO2 film).

Gas inlet Gas outlet pattern 83 mm 85 mm I13 mm I17 mm ࿑1㧔c㧕 ෻ᔕེ H㧔ᴪ㕙᡼㔚ဳ㧕

Fig. 1 (c) Reactor H (Surface discharge type).

Buried electrode

Discharge electrode

(3)

- 3 - SHC-30/1000㧕ࠍ↪޿ߡ⊒↢ߔࠆ㧚┙ߜ਄߇ࠅᤨ㑆ߪ⚂ 150 ns㧘 ࡇ࡯ࠢ㔚࿶ߣ➅ࠅ㄰ߒ๟ᵄᢙߪߘࠇߙࠇ25㨪35 kV㧘420 Hz ߢ޽ࠆ㧚࿑2㧔b㧕ߪ෻ᔕེ A㨪G ߦශടߔࠆ AC60 Hz 㜞㔚 ࿶ᵄᒻߢ޽ࠆ㧚AC100 V ৻⥸㔚Ḯࠍࡀࠝࡦ࠻࡜ࡦࠬ㧔࡟ࠪ࠶ ࡊ⵾㧘100-B-15UHCS㧕ߢ㧘20㨪30 kV ߦ᣹࿶ߒߡ޿ࠆ㧚એਅ ߢߪ㧘෻ᔕེA ߦࡄ࡞ࠬᵄࠍශടߒߚ႐วߪ̈A㧔ࡄ࡞ࠬ㧕̉㧘 AC60 Hz ࠍශടߒߚ႐วߪනߦ̈Ảߣ⴫⸥ߔࠆ㧚࿑ 2㧔c㧕 ߪᴪ㕙᡼㔚ဳ෻ᔕེHߦශടߐࠇࠆAC12.5 kHz ੤ᵹᵄᒻߢ㧘 ࡇ࡯ࠢ㔚࿶ߪ3㨪3.5 kV ߢ޽ࠆ㧚ߎߩᵄᒻߪჇ↰⎇ⓥᚲ⵾੤ ᵹ㔚ḮIP-0.1/8.5 ࠍ↪޿ߡ⊒↢ߔࠆ㧚 2.2 ታ㛎ⵝ⟎᭎⇛ NOx ㆶరታ㛎ߣๆ⌕೷ౣ↢ታ㛎ߦ౒ㅢߔࠆታ㛎ⵝ⟎ߩ᭎ ⇛ࠍ࿑3 ߦ␜ߔ㧚ࠪ࡝ࠞࠥ࡞ߢੇ῎ߐߖߚࠦࡦࡊ࡟࠶ࠨ࡯߆ ࠄߩⓨ᳇㧘޽ࠆ޿ߪN2ߣ2 㧑ߩ⓸⚛Ꮧ㉼ NO ߣࠍࠬ࠻࠶ࡊ ࡃ࡞ࡉઃࡑࠬࡈࡠ࡯ࠦࡦ࠻ࡠ࡯࡜ࠍㅢߒߡᷙวߒ㧘છᗧߩỚ ᐲߩNO Ꮧ㉼ࠟࠬࠍ෻ᔕེߦ࿑ 3 ਛ a ߆ࠄ b ߩะ߈ߦᵹߔߎ ߣ߇ߢ߈ࠆ㧚߹ߚ㧘3 ᣇᑯࠍ࿑ 3 ߩ⁁ᘒ߆ࠄ෻ᤨ⸘࿁ࠅߦ࿁ ォߐߖࠆߎߣߦࠃߞߡ㧘b ߆ࠄ a ߩะ߈ߦࠟࠬࠍ෻ᔕེߦᵹ ㅢߐߖࠆߎߣ߇ߢ߈ࠆ㧚ᓟㅀߔࠆࠃ߁ߦNO ๆ⌕೷߆ࠄ⣕⌕ ߐࠇߚࠟࠬỚᐲ߇㧘᷹ቯེߩ᷹ቯ▸࿐ࠍ⿥߃ࠆ႐วߪ㧘N2 ߢㆡቱᏗ㉼ߔࠆߎߣ߇ߢ߈ࠆ㧚ࠟࠬಽᨆེߦߪ NOx ᷹ቯེ 㧔ၳ႐⵾૞ᚲ⵾㧘ൻቇ⊒శᑼ㧘PG-235㧕ߣ N2O ᷹ቯེ㧔ၳ႐ ⵾૞ᚲ⵾㧘㕖ಽᢔ⿒ᄖ✢ಽᨆ⸘㧘 VIA-510㧕ࠍ↪޿ࠆ㧚 2.3 NOx ㆶరታ㛎ߩᣇᴺ ࠺ࠖ࡯࠯࡞ࠛࡦࠫࡦឃ಴ࠟࠬਛߩ NOx ߪឃ಴ᤨὐߢߪᄢ ㇱಽ߇৻㉄ൻ⓸⚛㧔NO㧕ߥߩߢ㧘ᧄ⎇ⓥߢߪ NO ߩㆶరታ㛎 ࠍⴕ߁㧚 2,000 ppm ߩ⓸⚛Ꮧ㉼ NO ࠍᵹ㊂ 1 L/min ߢ෻ᔕེ ߦᵹㅢߐߖ㧘ਅᵹ஥ߢNO㧘NOx㧘N2O Ớᐲࠍ᷹ቯߒߡ⓸⚛ 㕖ᾲࡊ࡜࠭ࡑߩലᨐࠍᛠីߔࠆ㧚߹ߚ㧘TiO2ࡍ࡟࠶࠻ࠍలႯ ߒߚ෻ᔕེE ߩ႐วߪ㧘৻ቯᤨ㑆 NO Ꮧ㉼ࠟࠬࠍ᡼㔚ߥߒߢ ෻ᔕེߦᵹㅢߐߖ㧘ࡍ࡟࠶࠻ߩNO ๆ⌕⢻ജ߇ήⷞߢ߈ࠆߎ ߣࠍ⏕⹺ߒߚᓟߢ㔚࿶ශടࠍⴕ޿㧘ฦᚑಽߩ᷹ቯࠍⴕ߁㧚 2.4 NO ๆ⌕೷ౣ↢ታ㛎ߩᣇᴺ ࡢࠗࡗ㧙౞╴ဳA㧔ࡄ࡞ࠬ㧕㧘ࡍ࡟࠶࠻ࠦ࡯࠻ဳ F㧘߅ࠃ߮ ᴪ㕙᡼㔚ဳH ߦ NO ๆ⌕೷㧔ࡔ࡞ࠢ␠⵾㧘ࡕ࡟ࠠࡘ࡜ࠪ࡯ࡉ MS-13X㧘I1.7㨪2 mm ⃿⁁ࡍ࡟࠶࠻㧕ࠍలႯߒߡ↪޿ࠆ㧚ๆ ⌕ᤨߪ෻ᔕེߦ࿑3 ਛ a ߆ࠄ b ߩะ߈ߦࠟࠬࠍᵹߔ㧚ๆ⌕ᤨ ߩࠟࠬߪੇ῎ⓨ᳇ߣ㧘2 㧑ߩ⓸⚛Ꮧ㉼ NO ߣࠍᷙวߒ㧘NO ࠍ500 ppm㧘O2ࠍ21㧑ߣߒߡ෻ᔕེߦㅢߔ㧚ᵹ㊂ߪ෻ᔕེߦ లႯߔࠆMS-13X ߩ㊀㊂ߦኻߒߡ 0.36 L/min-g㧔SV=16,000 h-1 ⋧ᒰ㧕ߣߔࠆ㧚⣕⌕ᤨߪ3 ᣇᑯࠍ෻ᤨ⸘࿁ࠅߦ࿁ォߐߖ㧘ๆ ⌕ᤨߣߪㅒᣇะ㧔b ߆ࠄ a ߩะ߈㧕ߦ෻ᔕེߦ N2ࠍᵹߔ㧚ᵹ ㊂ߪๆ⌕ᤨߩ1/2 ߣߔࠆ㧚หᤨߦ෻ᔕེߦ㜞㔚࿶ࠍශടߒߡ㧘 ⓸⚛㕖ᾲࡊ࡜࠭ࡑࠍ0.13㨪0.16 kWh/m3_{ߩ㔚ജߢ⊒↢ߐߖ㧘} ๆ⌕ߒߡ޿ߚNO ࠍ⣕⌕㧘ㆶరߒߡๆ⌕೷ࠍౣ↢ߔࠆ㧚ታ㛎 ᚻ㗅ߣߒߡߪ㧘߹ߕๆ⌕Ꮏ⒟ࠍ30 ಽ㑆ⴕ޿㧘ᰴߦ 12 ಽ㑆⣕ ⌕㧘ㆶరߐߖࠆ㧚ౣ߮㧘ๆ⌕Ꮏ⒟ߦ౉ࠅ㧘৻࿁⋡ߩNO Ớᐲ ߣᲧセߒ㧘ౣ↢ലᨐࠍᛠីߔࠆ㧚 2.5 ᕈ⢻ᜰᮡ NO Ꮧ㉼ࠟࠬߩ෻ᔕེㅢㆊߦࠃߞߡᷫዋߒߚ NOx ߩഀวࠍ

␜ߔNOx 㒰෰₸㧔NOx removal efficiency㧕㧘NO ߇㉄ൻߒߡ⊒

↢ߔࠆNO2㊂ࠍ␜ߔNO2↢ᚑ₸㧔NO2 yield ratio㧕㧘߅ࠃ߮ਇ

ቢోߥㆶర↢ᚑ‛N2O ߩ⊒↢㊂ࠍ␜ߔ N2O ↢ᚑ₸㧔N2O yield

ratio㧕ࠍᰴᑼߦࠃࠅቯ⟵ߔࠆ㧚

NOx removal efficiency (%)= (1- CNOx-O / CNO-I)100

NO2 yield ratio (%)=CNO2-O /CNO-I100

N2O yield ratio (%)= 2CN2O-O / CNO-I100

(CNOx-O: ਅᵹ NOx Ớᐲ㧘CNO-I: ਄ᵹ NO Ớᐲ㧘CNO2-O: ਅᵹ

NO2Ớᐲ㧘CN2O-O: ਅᵹ N2O Ớᐲ)

㪸㪸

㪹㪹

㪺

-10

0 -30

30

0

-4 4 0 Vo lta ge ( kV ) 0.5 Ps 10 kV 5 ms 15 kV 10 Ps 2 kV ࿑2 ශട㔚࿶ᵄᒻ 㧔a㧦ࡄ࡞ࠬᵄ㧘b㧦AC60Hz㧘c㧦AC12.5 kHz㧕

Fig. 2 Applied voltage.

(a: Pulsed wave, b: AC60 Hz, c: AC12.5 kHz).

࿑3 ታ㛎ⵝ⟎ߩ᭎⇛࿑

Fig. 3 Schematics of experimental setup. a b

Reactor

3-way-valve

NOx

N

2

O

Analyzers Mass flow controller Dilution line

By-pass line

NO/N2 _compressorAir N2

Silicagel

30 6 2006

(4)

⓸⚛㕖ᾲࡊ࡜࠭ࡑࠍ↪޿ߚNOx ㆶరߣๆ⌕೷ߩౣ↢㧔ศ↰ᕺ৻㇢ࠄ㧕

Ყࠛࡀ࡞ࠡ࡯ኒᐲ㧔SED: Specific Energy Density㧕ߪએਅߩ

ࠃ߁ߦቯ⟵ߔࠆ㧚

SED (kWh/m3_{) = P (W) / Q (L/min) / 60}

(P: discharge power, Q: gas flow rate)

ߎߎߢ᡼㔚㔚ജߪ㧘ࡄ࡞ࠬ㔚࿶ࠍශടߒߚ႐วߪࡊ࡜࠭ࡑ෻ ᔕེߩᄖ㕙ࠕ࡞ࡒ▗߆ࠄធ࿾ߦะ߆߁࡝࡯࠼✢ߦขઃߌߚ 㔚ᵹࡊࡠ࡯ࡉ㧔ࡇࠕ࠰ࡦࠛ࡟ࠢ࠻࡝࠶ࠢ␠⵾㧘Current Monitor Model 2878㧕ߣࠝࠪࡠࠬࠦ࡯ࡊ㧔ᮮᴡ㔚ᯏ⵾㧘DL1740㧕 ࠍ↪޿ߡ᷹ቯߐࠇߚ㔚࿶߅ࠃ߮᡼㔚㔚ᵹ߆ࠄ᳞߼ࠆ㧚ශട㔚 ࿶߇ AC ߩ႐วߪኻะ㔚ᭂߣធ࿾ߦะ߆߁࡝࡯࠼✢ߩ㑆ߦ 0.047㨪0.47 PF ߩࠦࡦ࠺ࡦࠨ࡯ࠍធ⛯ߒ㧘࡝ࠨ࡯ࠫࡘᴺߦࠃ ࠅ㔚⩄㊂ߩᄌൻ߆ࠄ㧘᡼㔚㔚ᵹࠍ▚಴ߒߡ㔚ജࠍ᳞߼ࠆ㧚 3. ታ㛎⚿ᨐ߅ࠃ߮⠨ኤ 3.1 NOx ㆶరታ㛎 3.1.1 ฦ෻ᔕེߩශട㔚࿶ߣ᡼㔚㔚ജߩ㑐ଥ ⚿ᨐࠍ࿑4 ߦ␜ߔ㧚㔚ᭂ᦭ല㐳 L=50 mm ߢ㧘AC60Hz ࠍ ශടߒߚ෻ᔕེA㧘C㨪G ߦߟ޿ߡᲧセߔࠆ㧚ࡍ࡟࠶࠻లႯ ဳ D㧔BaTiO3㧕ߩ᡼㔚㔚ജ߇ᦨ߽ዊߐߊ㧘ᰴߦࡍ࡟࠶࠻ల ႯဳE㧔TiO2㧕㧘ࡢࠗࡗ㧙౞╴ဳA ߩ㗅ߦ㔚ജ߇ᄢ߈ߊߥࠅ㧘 ᣢႎߣ߽৻⥌ߔࠆ 18)㧚లႯߔࠆࡍ࡟࠶࠻ߩ⺃㔚₸߇㜞޿߶ ߤ㧘᡼㔚㔚ജߪዊߐߊߥߞߚ㧚෻ᔕེA ߣ TiO2⤑ࠍࠦ࡯࠹ ࠖࡦࠣߒߚ෻ᔕེC ߣߢߪᏅ߇⷗ࠄࠇߕ㧘⭯޿⺃㔚૕ጀߩ ᓇ㗀ߪ⃻ࠇߥ߆ߞߚ㧚2 ⒳㘃ߩࡍ࡟࠶࠻ࠦ࡯࠻ဳ F㧔I3

mm-BaTiO3㧕㧘G㧔I1 mm-BaTiO3㧕ߩ㑆ߦߪᏅ߇⷗ࠄࠇߥ߆

ߞߚ㧚ਛᔃߩ✢㔚ᭂߣ⺃㔚૕ࡍ࡟࠶࠻వ┵ߩ〒㔌ߪ F ߩ႐ ว6.8 mm㧘G ߩ႐ว 9.3 mm ߢ޽ࠆ߇㧘ߎߩ▸࿐ߢߪ㔚ᭂ㑆〒㔌ߩᓇ㗀߇ߥ߆ߞߚ㧚߹ߚ㧘෻ᔕེF㧘G ߩ㔚࿶ߦኻߔࠆ 㔚ജߩ਄᣹₸ߪ25 kV એ਄ߩ▸࿐ߢߪ෻ᔕེ A㧘C ࠃࠅ߽ᄢ ߈߆ߞߚ㧚 ᴪ㕙᡼㔚ဳH ߢߪ㧘ශട㔚࿶ߦኻߒߡ᡼㔚㔚ജ߇ᕆỗߦ ਄᣹ߒߡ޿ࠆ㧚ߎࠇߪශട㔚࿶ߩ๟ᵄᢙ߇㜞޿ߎߣ߿ࠕ࡞ ࡒ࠽࠮࡜ࡒ࠶ࠢߩ⺃㔚៊ᄬߦ㑐ଥߒߡ޿ࠆߣᕁࠊࠇࠆ㧚੹ ᓟ㧘ߎࠇࠄߦߟ޿ߡߪ⹦⚦ߦ⺞ߴࠆᔅⷐ߇޽ࠆ㧚L=100 mm ߢ޽ࠆB ߩ㔚ജߪ L=50 mm ߩ A ߩ㔚ജߩ⚂ 2 ୚ߣߥߞߡ ߅ࠅ㧘㔚ജ߇L ߦኻߒߡ߶߷Ყ଀ߒߡ޿ߚ㧚߹ߚ㧘A㧔ࡄ࡞ ࠬ㧕ߩ႐ว㧘A ߩ႐วߦᲧߴ㧘ห৻㔚࿶ߢ߽ᄢ߈޿㔚ജ߇ ᛩ౉ߐࠇߚ㧚 3.1.2 SED ߣ㒰෰ߐࠇߚ NOx Ớᐲߩ㑐ଥ ࿑5 ߪ෻ᔕེࠍㅢࠆߎߣߦࠃߞߡㆶరߐࠇ㧘ᷫዋߒߚ NOx ỚᐲߣSED ߩ㑐ଥࠍ␜ߔ㧚ࡢࠗࡗ㧙౞╴ဳ㧔A㨪C㧕ߩ㑆ߢ ߪ㧘㒰෰ᕈ⢻ߪࡄ࡞ࠬᵄࠍශടߒߚL=50 mm ߩ෻ᔕེ A㧔ࡄ ࡞ࠬ㧕ߢ㜞ߊ㧘෻ᔕེC㧔TiO2⤑ࠦ࡯࠹ࠖࡦࠣ㧕㧘෻ᔕེA㧘 B ߦฦޘAC60 Hz ࠍශടߒߚ႐วߪૐ߆ߞߚ㧚ࡄ࡞ࠬᵄࠍශ ടߒߚ႐วߪ▤ౝ߇৻᭽ߦ⊒శߒ㧘ᐢߊࠬ࠻࡝࡯ࡑ߇⊒↢ߒ ߡ޿ߚߩߦኻߒ㧘AC60 Hz ߢߪᒝ޿⊒శ߇⏕⹺ߢ߈ߥ߆ߞߚ㧚 ߎߩߚ߼㧘▤ౝߢൻቇ෻ᔕ߇↢ߓࠆ㗔ၞ߇AC60 Hz ࠍශടߒ ߚ႐วߢߪዊߐߊ㧘ᕈ⢻߇ૐ޿ߣ⠨߃ࠆ㧚ฦ෻ᔕེߩឬߊᦛ ✢߇ᔅߕේὐࠍㅢࠆߎߣࠍ⠨ᘦߔࠆߣ㧘A㧔ࡄ࡞ࠬ㧕ߩ႐ว㧘㒰෰NOx Ớᐲߪ 0㨪1,400 ppm ߩ㑆ߢߪ SED ߦኻߒߡᲧ଀ߒ ߡ޿ࠆߎߣ߇ࠊ߆ࠆ㧚ߎߩߎߣ߆ࠄ㧘⓸⚛㕖ᾲࡊ࡜࠭ࡑߦࠃ ࠆNOx ㆶర෻ᔕߩỚᐲଐሽᕈߪ 600㨪2,000 ppm ߩ NOx Ớᐲ ▸࿐ߢߪૐ޿ߎߣ߇ࠊ߆ߞߚ㧚߹ߚ㧘L=50 mm ߢ޽ࠆ෻ᔕེ A ߣ L=100 mm ߢ޽ࠆ෻ᔕེ B ߇ห৻ᦛ✢਄ߦߩࠆߎߣ߆ࠄ㧘 NOx ㆶరߦߪṛ⇐ᤨ㑆ࠃࠅ߽ SED ߩᓇ㗀ߩᣇ߇ᄢ߈޿ߎߣ ߇ࠊ߆ࠆ㧚 ࡢࠗࡗ㧙౞╴ဳએᄖߩ෻ᔕེ㧔D㨪H㧕ߦߟ޿ߡᲧセࠍⴕ ߁㧚 SED ߇ 0.1 kWh/m3_{એਅߩ▸࿐ߢߪ㧘ᴪ㕙᡼㔚ဳ}_H㧘ࡍ ࡟࠶࠻లႯဳ E㧔TiO2㧕㧘ࡍ࡟࠶࠻ࠦ࡯࠻ဳߩ F㧔I3

mm-BaTiO3㧕㧘G㧔I1 mm-BaTiO3㧕ߩ㗅ߦ㒰෰ߐࠇߚNOx Ớ

Re m ov ed N O x co nc en tr at io n (p pm ) D is ch ar ge P ow er ( W ) Applied voltage (kV) SED (kWh/m3₎ ࿑5 SED ߣ㒰෰ߐࠇߚ NOx Ớᐲߩ㑐ଥ

Fig. 5 Removed NOx concentration versus SED.

࿑4 ශട㔚࿶ߣ᡼㔚㔚ജߩ㑐ଥ

Fig. 4 Discharge power versus applied voltage.

0 200 400 600 800 1000 1200 1400 1600 1800 0.0 0.1 0.2 0.3 0.4 0.5 0 5 10 15 20 25 0 10 20 30 40 A B H A (pulse) G F C E D A _B H A (pulse) G F C E D

(5)

- 5 - ᐲ߇㧘㜞߆ߞߚ㧚SED ߇ 0.05 kWh/m3_{એਅߩ㗔ၞߢߪ㧘ࡍ࡟} ࠶࠻లႯဳD㧔BaTiO3㧕㧘 ᴪ㕙᡼㔚ဳH㧘ࡍ࡟࠶࠻లႯဳ E 㧔TiO2㧕ߩ3 ⒳㘃ߪ߶߷ห৻ᦛ✢⁁ߦਸ਼ߞߡ޿ߚ㧚෻ᔕེ A ࠃࠅ߽ࡍ࡟࠶࠻లႯဳD㧘E ߩ㒰෰ᕈ⢻߇㜞޿ߎߣߦߟ޿ߡ ߪ㧘ࡍ࡟࠶࠻㑆ߩࡑࠗࠢࡠ࠺ࠖࠬ࠴ࡖ࡯ࠫ߇ⓨ㑆⊛ߦᐢߊಽ Ꮣߒ㧘ൻቇ෻ᔕߩ↢ߓࠆ㗔ၞ߇ᐢ߇ࠆߎߣ߇ℂ↱ߣ⠨߃ࠄࠇ ࠆ㧚߹ߚ㧘෻ᔕེA ࠃࠅ߽ F㧘G ߩᕈ⢻߇㜞޿ߩߪ㧘⍹⧷▤ ౝ㕙ߩࡍ࡟࠶࠻వ┵ߢߩ㔚⇇㓸ਛߦࠃߞߡ㧘ធ࿾஥߆ࠄ߽ࠬ ࠻࡝࡯ࡑ߇⊒↢ߔࠆߚ߼ߢߪߥ޿߆ߣ⠨߃ࠆ㧚ࡍ࡟࠶࠻వ┵ ߩ㔚⇇㓸ਛߩነਈߦߟ޿ߡߪI3 mm ߩࡍ࡟࠶࠻ࠍ↪޿ߚ෻ ᔕེF ߩᣇ߇㧘㔚⇇㓸ਛߩ↢ߓߦߊ޿I1 mm ߩࡍ࡟࠶࠻ࠍ↪ ޿ߚ෻ᔕེG ࠃࠅ߽㜞ᕈ⢻ߢ޽ࠆߎߣ߆ࠄ߽ⵣઃߌࠄࠇࠆ㧚㒰෰Ớᐲᦛ✢߇㧘ࡢࠗࡗ㧙౞╴ဳ㧔A㨪C㧕ߢߪ⋥✢⊛ߢ޽ࠆ ߩߦኻߒ㧘D㨪H ߢߪ਄ߦಲߢ޽ࠆߎߣߦߟ޿ߡߪ㧘BaTiO3 ߿ࠕ࡞ࡒ࠽ߩᾲ៊ᄬ߇㧘㜞޿᡼㔚㔚ജߢᄢ߈ߊߥࠆߚ߼ߢߪ ߥ޿߆ߣ⠨߃ࠆ㧚SED=0.2㨪0.3 kWh/m3_{ߩ▸࿐ߢᴪ㕙᡼㔚ဳ} H ߪ㧘A㧔ࡄ࡞ࠬ㧕ࠃࠅ߽ᄙ㊂ߩ NOx ࠍ㒰෰ߢ߈ߚ㧚෻ᔕེ H એᄖߪ㜞࿶㔚Ḯߩ೙⚂਄㧘NOx 㒰෰₸ߪ 30 㧑એਅߣߥߞ ߚ㧚 3.1.3 NOx 㒰෰₸ߣ NO2↢ᚑ₸ߩ㑐ଥ ࿑6 ߦ࿑ 5 ߣห৻ߩ᧦ઙߢߩ NOx 㒰෰₸ߣ NO2↢ᚑ₸ߩ 㑐ଥࠍ␜ߔ㧚߹ߕ㧘NOx 㒰෰₸ 30%એਅߩ㗔ၞߦߟ޿ߡ⷗ࠆ ߣ㧘ࡍ࡟࠶࠻లႯဳE㧔TiO2㧕એᄖߢߪߔߴߡ㧘NOx 㒰෰₸ ߣߣ߽ߦNO2↢ᚑ₸߽਄᣹ߒߡ޿ࠆ㧚ߒߚ߇ߞߡ㧘NOx ߩㆶ ర㧘ಽ⸃ߢ⊒↢ߒߚO2߇ౣ߮NO ࠍ㉄ൻߒߡ޿ࠆߎߣ߇ࠊ ߆ࠆ㧚෻ᔕེE ߩ႐วߪ㧘NO2↢ᚑ₸߇0 ߢ޽ߞߚ㧚NO2ߪ ᭂᕈࡕ࡯ࡔࡦ࠻ߩᄢ߈޿ಽሶߢ޽ࠅ㧘ๆ⌕ߐࠇ߿ߔ޿ᕈ⾰ࠍ ᜬߟߩߢ㧘NO2ߪTiO2਄ߦๆ⌕ߐࠇ㧘ਅᵹߦᵹ಴ߒߥ޿ߚ߼ ߢߪߥ޿߆ߣ⠨߃ࠆ㧚ߥ߅㧘෻ᔕེD㨪G ߩ BaTiO3ࡍ࡟࠶࠻ ߇㧘NO2ࠍๆ⌕ߒߥ޿ߎߣࠍ⏕⹺ߒߡ޿ࠆ㧚ᦨ߽NO2↢ᚑ₸ ߇㜞޿ߩߪ㔚ᭂ᦭ല㐳L=100 mm ߩࡢࠗࡗ㧙౞╴ဳ෻ᔕེ B ߢ޽ߞߚ㧚NOx 㒰෰₸߇ዊߐ޿ߚ߼㧘᷹ቯ⺋Ꮕߪᄢ߈޿߽ߩ ߩ㧘෻ᔕེB ߪ L=50 mm ߩࡢࠗࡗ㧙౞╴ဳ A ࠃࠅ߽ NO2↢ ᚑ₸߇㜞޿௑ะ߇޽ࠅ㧘ṛ⇐ᤨ㑆ߩᓇ㗀߇⷗ࠄࠇࠆ㧚߹ߚ㧘 ෻ᔕེA ߣ෻ᔕེ C 㧔TiO2⤑ࠦ࡯࠹ࠖࡦࠣ㧕ߩᏅߪߥߊ㧘 TiO2⤑ߩᓇ㗀ߪ⷗ࠄࠇߥ߆ߞߚ㧚෻ᔕེC㧘ࡍ࡟࠶࠻లႯဳ D㧔BaTiO3㧕㧘ࡍ࡟࠶࠻ࠦ࡯࠻ဳF㧘G ߩ NO2↢ᚑ₸ߪห╬ߢ ޽ߞߚ㧚৻ᣇ㧘NOx 㒰෰₸ 40%એ਄ߩ㗔ၞࠍ⷗ࠆߣ㧘෻ᔕེ A㧔ࡄ࡞ࠬ㧕㧘ᴪ㕙᡼㔚ဳ H ߩ NO2↢ᚑ₸߇㧘ᷫዋߒߡ߅ࠅ㧘 NO2ߩಽ⸃߽චಽߦࠛࡀ࡞ࠡ࡯ࠍਈ߃ࠆߎߣߢน⢻ߢ޽ࠆߎ ߣ߇␜ߐࠇߡ޿ࠆ㧚 3.1.4 NOx 㒰෰₸ߣ N2O ↢ᚑ₸ߩ㑐ଥ ࿑7 ߦ࿑ 5㧘6 ߣห৻᧦ઙߢߩ NOx 㒰෰₸ߣ N2O ↢ᚑ₸ߩ 㑐ଥࠍ␜ߔ㧚࿑ਛฝ਄┵ߩ࿑ߪNOx 㒰෰₸ 12 %એਅ㧘N2O ↢ᚑ₸0.4 %એਅߩ㗔ၞࠍ᜛ᄢߒߚ߽ߩߢ޽ࠆ㧚N2O ↢ᚑ₸ ߩ႐วߪ NOx 㒰෰₸ߩჇടߣߣ߽ߦන⺞ߦ਄᣹ߔࠆ௑ะ߇ ⷗ࠄࠇߚ㧚N2O ߪ NO ࠍಽ⸃ߔࠆ㓙ߩ೽↢ᚑ‛ߣߒߡ↢ߓࠆ ߎߣ߇㧘߹ߕ⠨߃ࠄࠇࠆ㧚NOx 㒰෰₸ 40 %એ਄ߩ㗔ၞߢ㧘 NO2↢ᚑ₸ߩᷫዋߣ N2O ↢ᚑ₸ߩ਄᣹߇หᤨߦ↢ߓߡ޿ࠆ ߎߣ߆ࠄ㧘NO2ߩಽ⸃ᤨߦN2O ߇↢ᚑߔࠆน⢻ᕈ߽޽ࠆ㧚ߎ ߩਛߢ㧘ࡍ࡟࠶࠻లႯဳE㧔TiO2㧕ߦ߅޿ߡ․ߦ㜞޿N2O ↢ ᚑ߇⷗ࠄࠇߚߩߪ෻ᔕ⚻〝ߪਇ᣿ߢ޽ࠆ߇㧘૗ࠄ߆ߩ⸅ᇦ෻ ᔕ߇↢ߓߡ޿ࠆน⢻ᕈ߇޽ࠆ㧚TiO2⤑ࠍࠦ࡯࠹ࠖࡦࠣߒߚࡢ ࠗࡗ㧙౞╴ဳ෻ᔕེC ߩ NO2㧘N2O ↢ᚑ₸㧘NO 㒰෰₸ߪߔ ߴߡ෻ᔕེA ߣห╬ߢ޽ࠅ㧘ࡍ࡟࠶࠻ߩࠃ߁ߥ⸅ᇦ෻ᔕ߇⷗ ࠄࠇߥ߆ߞߚ㧚ߎࠇߪࡍ࡟࠶࠻߇ᄙሹ⾰ߢ޽ࠆߩߦኻߒ㧘ࠦ ࡯࠹ࠖࡦࠣ⤑ߪᐔ㕙ߢ޽ࠆߚ߼㧘⴫㕙ⓍߩᏅ߇ේ࿃ߣ⠨߃ࠆ㧚 2 ⒳㘃ߩࡢࠗࡗ㧙౞╴ဳ A㧔L=50 mm㧕ߣ B㧔L=100 mm㧕ߩ 㑆ߦߪᏅ߇ߥߊ㧘ṛ⇐ᤨ㑆ߩᓇ㗀ߪ⷗ࠄࠇߥ޿㧚ࡍ࡟࠶࠻ల ႯဳD㧔BaTiO3㧕㧘ࡍ࡟࠶࠻ࠦ࡯࠻ဳF㧘G㧘ᴪ㕙᡼㔚ဳ H ߩ 㑆ߢߪᄢ߈ߥᏅ߇⷗ࠄࠇߥ޿㧚 ৻ᣇ㧘NOx 㒰෰₸ 40㧑એ਄ ߩ㗔ၞࠍ⷗ࠆߣ㧘෻ᔕེA㧔ࡄ࡞ࠬ㧕ߩ N2O ↢ᚑ₸ߪ෻ᔕེ H ߩ߽ߩࠃࠅ߽ૐߊ㧘ࡄ࡞ࠬࠦࡠ࠽᡼㔚ߢߪ N2O ↢ᚑ㊂߇ዊ ߐ޿ߎߣ߇ࠊ߆ߞߚ㧚 ࿑6 NOx 㒰෰₸ߣ NO2↢ᚑ₸ߩ㑐ଥ ࿑7 NOx 㒰෰₸ߣ N2O ↢ᚑ₸ߩ㑐ଥ

Fig. 6 NO2 yield ratio versus NOx removal efficiency.

Fig. 7 N2O yield ratio versus NOx removal efficiency.

N2 O y ie ld r at io ( % ) N O2 y ie ld r at io ( % )

NOx removal efficiency (%)

NOx removal efficiency (%) 0 1 2 3 4 5 6 0 20 40 60 80 100 0 1 2 3 4 5 6 0 20 40 60 80 100 H A (pulse) F D E G B C A E H A (pulse) F G D 0.0 0.4 0 12 C A B 30 6 2006 288 (44)

(6)

NOx ㆶరߣๆ⌕೷ߩౣ↢㧔ศ↰ᕺ৻㇢ࠄ㧕 3.1.5 ฦ⒳෻ᔕེߩNOx ㆶరࠛࡀ࡞ࠡ࡯ല₸ NOx 㒰෰₸ߣ㧘NOx ㆶరߩࠛࡀ࡞ࠡ࡯ല₸㧔න૏᡼㔚㔚ജ ㊂޽ߚࠅಽ⸃ߐࠇߚNOx ߩ NO2឵▚⾰㊂㧕ࠍ࿑8 ߦ␜ߔ㧚 ߹ߚ㧘෻ᔕེA㨪C ߦߟ޿ߡߪ᜛ᄢߒߡ␜ߔ㧚NOx 㒰෰₸ 60 %એਅߩ㗔ၞߢߪᴪ㕙᡼㔚ဳ H ߩࠛࡀ࡞ࠡ࡯ല₸߇ᦨ߽ 㜞޿ߎߣ߇ಽ߆ࠆ㧚ߚߛߒ㧘NOx 㒰෰₸ 60 %એ਄ߩ㗔ၞߢ ߪ෻ᔕེA㧔ࡄ࡞ࠬ㧕ߣߩᏅ߇ዊߐߊߥࠆߣ⠨߃ࠄࠇࠆ㧚NOx 㒰෰₸߇15 %એਅߩ㗔ၞࠍ⷗ࠆߣ㧘ࡍ࡟࠶࠻లႯဳ D㧘E ߩ ࠛࡀ࡞ࠡ࡯ല₸߇ᦨ߽㜞ߊ㧘෻ᔕེH ߣห╬ߢ޽ࠆ߇㧘NOx 㒰෰₸ߩჇടߣߣ߽ߦᕆỗߦૐਅߒߚ㧚ࡍ࡟࠶࠻ࠦ࡯࠻ဳF㧘 G ߪ෻ᔕེ D㧘E ߦᰴߋࠛࡀ࡞ࠡ࡯ല₸ࠍ␜ߒߚ㧚ࡢࠗࡗ㧙 ౞╴ဳ A㨪C ߩࠛࡀ࡞ࠡ࡯ല₸ߪో෻ᔕེਛᦨ߽ૐ߆ߞߚ㧚 ෻ᔕེB ߩࠛࡀ࡞ࠡ࡯ല₸ߩᄌൻ㊂ߪ NOx 㒰෰₸ 2㨪10 % ߩ▸࿐ߢߪዊߐߊ㧘෻ᔕེA㧘C ߩ⚿ᨐߪ B ߩᦛ✢਄ߦਸ਼ߞ ߡ޿ߚ㧚NOx 㒰෰₸ 2 %એਅߢߩ෻ᔕེ A㨪C ߩࠛࡀ࡞ࠡ࡯ ല₸ߪ NOx 㒰෰₸ߣߣ߽ߦᕆỗߦૐਅߒߡ޿ࠆ߇㧘ᄌൻ᏷ ߪ2 g(NO2)/kWh ⒟ᐲߣዊߐ޿ߚ߼㧘੹ᓟࠃࠅᄙߊߩ࠺࡯࠲ࠍ ↪޿ߡ⺋Ꮕ⹏ଔࠍⴕߞߚ਄ߢ⠨ኤߒߚ޿㧚 ࡍ࡟࠶࠻ࠦ࡯࠻ဳF㧘G ߩࠛࡀ࡞ࠡ࡯ല₸߇෻ᔕེ A㨪C ࠃࠅ߽㜞߆ߞߚߎߣ߆ࠄ⍹⧷▤ౝ㕙ߦ࿕ቯߒߚ⺃㔚૕ࡍ࡟ ࠶࠻ߪ৻ቯߩലᨐࠍᜬߟߎߣ߇ࠊ߆ࠆ㧚෻ᔕེD ߩ୯ߪ㧘㔚 Ḯߣ෻ᔕེߩࠗࡦࡇ࡯࠳ࡦࠬᢛว਄ߩ೙⚂ߢᄢ㔚ജ߇ᛩ౉ ߢ߈ߕ㧘㒰෰₸20㧑એਅߣߥߞߚߎߣࠍ⠨߃ࠆߣ㧘⃻ᤨὐߢ ᦨ߽ታ↪਄᦭ലߥ߽ߩߪᴪ㕙᡼㔚ဳH ߢ޽ࠆ㧚޿ߕࠇߦߒߡ ߽㧘NOx ߩ⓸⚛㕖ᾲࡊ࡜࠭ࡑߦࠃࠆㆶరߦߪᔅߕߒ߽ᣢႎߩ ࡄ࡞ࠬࠦࡠ࠽᡼㔚ࠍ૶߁ᔅⷐ߇ή޿ߎߣ߇ࠊ߆ࠆ㧚෻ᔕེߦ ࠃࠆNO2㧘N2O ↢ᚑ₸㧘NOx 㒰෰₸ߩ㆑޿ߦߟ޿ߡߪ੹ᓟ㧘 ᢙ୯⸘▚ߥߤࠍⴕ޿㧘⃻⽎ࠍ⸃᣿ߒߡ޿ߊ੍ቯߢ޽ࠆ㧚 3.2 NO ๆ⌕೷ౣ↢ታ㛎 ࿑9 ߦਅᵹ஥ NO Ớᐲߩផ⒖ࠍ␜ߔ㧚1 ࿁⋡ߩๆ⌕Ꮏ⒟ߩ Ớᐲផ⒖ߪ3 ⒳㘃ߩ෻ᔕེߢ╬ߒߊߥࠆߪߕߢ޽ࠆ߇㧘෻ᔕ ེA㧔ࡄ࡞ࠬ㧕ߩߺૐỚᐲߣߥߞߡ޿ߚ㧚෻ᔕེ A㧔ࡄ࡞ࠬ㧕 ߢߪMS-13X ࡍ࡟࠶࠻ࠍలႯߔࠆⓨ㑆߇లಽߦᐢߊ㧘ᦨኒల Ⴏߣߥࠅ㧘ࠟࠬߣࡍ࡟࠶࠻߇లಽߦធ⸅ߔࠆߚ߼ߣ⠨߃ࠄࠇ ࠆ㧚৻ᣇ㧘ࡍ࡟࠶࠻ࠦ࡯࠻ဳ F ߢߪ⍹⧷▤ౝ㕙ߦធ⌕ߒߚ BaTiO3ࡍ࡟࠶࠻ߦࠃࠆಳಲߩߚ߼㧘ᴪ㕙᡼㔚ဳH ߢߪᴪ㕙᡼ 㔚⚛ሶߣࠕ࡞ࡒ⵾ኈེౝ㕙ߣߩ㓗㑆߇⁜޿ߚ߼㧘ᦨኒలႯߦ ߪߥࠄߕ㧘ࠟࠬߣMS-13X ߩធ⸅߇లಽߢߪߥ޿ߣ⠨߃ࠄࠇ ࠆ㧚 ࡢࠗࡗ㧙౞╴ဳ෻ᔕེA ߩ MS-13X ߩలႯ㊂ߪ 10.4 g ߢ޽ ߞߚ㧚ๆ⌕ࠟࠬ㧘⣕⌕↪N2ᵹ㊂㧘᡼㔚㔚ജߪߘࠇߙࠇ4.0 L/min㧘 2.0 L/min㧘36 W 㧔ࡄ࡞ࠬᵄ㧘31 kV㧘SED=0.14 kWh/m3_㧕ߣ ߒߚ㧚ౣ↢Ꮏ⒟ߩ⣕⌕NO Ớᐲߪࡇ࡯ࠢ୯ 3,340 ppm ߣᦨ߽ 㜞ߊߥߞߚ㧚2 ࿁⋡ߩๆ⌕Ꮏ⒟ߢ㧘ਅᵹ NO Ớᐲ߇ 1 ࿁⋡ߩ ⚳ੌᤨࠃࠅૐߊߥߞߡ޿ࠆߎߣ߆ࠄ㧘෻ᔕེA㧔ࡄ࡞ࠬ㧕ߪ లಽߥౣ↢⢻ജࠍᜬߟߎߣ߇ࠊ߆ࠆ㧚 ࡍ࡟࠶࠻ࠦ࡯࠻ဳF㧔I3 mm-BaTiO3㧕ߩMS-13X లႯ㊂ߪ 5.2 g ߢ޽ߞߚ㧚ๆ⌕ࠟࠬ㧘⣕⌕↪ N2ᵹ㊂㧘᡼㔚㔚ജߣలႯ ㊂ߣߩ㊂⊛㑐ଥࠍA㧔ࡄ࡞ࠬ㧕ߣห╬ߦߒ㧘ߘࠇߙࠇ2.0 L/min㧘 1.0 L/min㧘19 W 㧔39 kV㧘SED=0.14 kWh/m3_{㧕ߣߒߚ㧚ౣ↢} Ꮏ⒟ߩࡇ࡯ࠢỚᐲߪ550 ppm ߢ޽ࠅ㧘ࡄ࡞ࠬᵄශടߩ႐วࠃ ࠅ߽ૐ޿୯ߣߥߞߚ㧚߹ߚ㧘2 ࿁⋡ߩๆ⌕Ꮏ⒟ߪ㧘1 ࿁⋡ߩ ⚳ੌᤨห╬ߩਅᵹNO Ớᐲ߆ࠄ㐿ᆎߐࠇߡ߅ࠅ㧘ౣ↢ᕈ⢻߇ ૐ߆ߞߚ㧚 ᴪ㕙᡼㔚ဳH ߢߪ MS-13X ߩలႯ㊂ߪ 3.6 g ߣߥࠅ㧘ๆ⌕ ࠟࠬ㧘⣕⌕↪N2ᵹ㊂㧘᡼㔚㔚ജߪߘࠇߙࠇ1.4 L/min㧘0.7 L/min㧘 12 W 㧔3.5 kV㧘SED=0.13 kWh/m3_{㧕ߢ޽ࠆ㧚᡼㔚ᤨߩᵹ಴} NO ࡇ࡯ࠢỚᐲߪ 74 ppm ߢ 3 ⒳㘃ߩౝ㧘ᦨ߽ૐ߆ߞߚ㧚2 ࿁ 0 100 200 300 400 500 600 0 20 40 60 ࿑9 ࡊ࡜࠭ࡑ⣕⌕ߦࠃࠆMS-13Xߩౣ↢ലᨐ

Fig. 9 Regeneration of MS-13X by plasma desorption. Elapsed time (min)

N O c on ce nt ra tio n (p pm )

The peak value =3,340 ppm 1st ads. 2nd ads. Regeneration A (pulse) F H 0 2 4 6 8 10 12 14 16 18 20 0 20 40 60 80 100 0 1 2 3 4 0 5 10 15 A (pulse) H E D G F A B C

Fig. 8 Energy efficiency versus NOx removal efficiency.

En er gy e ff ic ie nc y (g ( N O2 )/ kW h)

NOx removal efficiency (%)

(7)

- 7 - ⋡ߩๆ⌕Ꮏ⒟ߩNO Ớᐲߪᦨ߽㜞ߊ㧘MS-13X ߩౣ↢ലᨐߪ ૐ߆ߞߚ㧚 ࿑5 ߆ࠄࠊ߆ࠆࠃ߁ߦ㧘0.14 kWh/m3_ߩ_{SED ߢߩ NOx ㆶర} ᕈ⢻ߪ෻ᔕེH ߢᦨ߽㜞߆ߞߚߦ߽߆߆ࠊࠄߕ㧘ๆ⌕೷ߩౣ ↢ലᨐߪᦨ߽ૐ߆ߞߚ㧚߹ߚ㧘NOx ㆶరᕈ⢻߇ห৻ SED ߢ ห╬ߢ޽ࠆF ߣ A㧔ࡄ࡞ࠬ㧕ߩౣ↢ലᨐ߽⇣ߥߞߡ޿ߚ㧚ߎ ࠇࠄߩ⚿ᨐߣ㧘ౣ↢ലᨐ߇㜞޿߽ߩߪMS-13X ߆ࠄ⣕⌕ߔࠆ NO Ớᐲ߽㜞޿ߎߣࠍ⠨߃ࠆߣ㧘NO ߪๆ⌕ߐࠇߚ⁁ᘒߢߪࡊ ࡜࠭ࡑߦࠃࠆಽ⸃߇಴᧪ߥ޿ߣ⠨߃ࠄࠇࠆ㧚෻ᔕེA㧔ࡄ࡞ ࠬ㧕ߩNO ⣕⌕⢻ജ߇㧘ᦨ߽㜞޿ߎߣ߆ࠄ㧘ࡄ࡞ࠬࠦࡠ࠽᡼ 㔚ߢߪ⣕⌕ߦᔅⷐߥḰ቟ቯߥಽሶ߿⩄㔚☸ሶ㧘㜞ㅦߩ㔚ሶ߇ ↢ߓ߿ߔ޿ߎߣ߇⠨߃ࠄࠇࠆ㧚߹ߚ㧘NO ⣕⌕߳ߩᾲࠛࡀ࡞ ࠡ࡯ߩነਈߥߤߦߟ޿ߡs ߽ࡢࠗࡗ㧙౞╴ဳߣ⺃㔚૕ࠍ↪޿ ߚ෻ᔕེߩ႐วߣߢߪ⇣ߥࠆน⢻ᕈ߽޽ࠆ㧚ߎࠇࠄ㧘ࡊ࡜࠭ ࡑߦࠃࠆ⣕⌕⃻⽎ߩ⸃᣿ߪᧄⓂߩ▸࿐ࠍ⿥߃ࠆߚ߼㧘੹ᓟᢙ ୯ࠪࡒࡘ࡟࡯࡚ࠪࡦߥߤࠍㅢߒߡ⸃᣿ߒߡ޿߈ߚ޿㧚 4. ߹ߣ߼ (1) ᴪ㕙᡼㔚ဳ෻ᔕེ H ߪ NOx 㒰෰₸ 60 %એਅߩ㗔ၞߢ ࡄ࡞ࠬᵄࠍශടߒߚࡢࠗࡗ㧙౞╴ဳ෻ᔕེࠃࠅ߽⓸ ⚛㕖ᾲࡊ࡜࠭ࡑߦࠃࠆ NOx ㆶరߩࠛࡀ࡞ࠡ࡯ല₸߇ 㜞߆ߞߚ㧚 (2) AC60 Hz 㜞㔚࿶ࠍශടߒߚ႐ว㧘NOx ㆶరߩࠛࡀ࡞ࠡ ࡯ല₸ߪNOx 㒰෰₸ 20 %એਅߩ㗔ၞߢ⋥ᓘ 3 mm ߩ TiO2ࡍ࡟࠶࠻ࠍలႯߒߚ෻ᔕེEߦ߅޿ߡᦨ߽㜞ߞߚ㧚 (3) NOx ㆶరᕈ⢻ߪ AC60 Hz ࠍශടߒߚࡢࠗࡗ㧙౞╴ဳ ෻ᔕེA㧘B ߢᦨ߽ૐ߆ߞߚ߇㧘෻ᔕེߩౝ㕙ߦ⋥ᓘ 3 mm ޽ࠆ޿ߪ 1 mm ߩ BaTiO3ࡍ࡟࠶࠻ࠍ৻ጀߦធ⌕ ߔࠆߎߣߢ㧘ะ਄ߐߖࠆߎߣ߇ߢ߈ߚ㧚 (4) TiO2ࡍ࡟࠶࠻ࠍలႯߒߚ෻ᔕེߢߪ⸅ᇦ૞↪ߦࠃߞ ߡN2O ߩ↢ᚑ㊂߇Ⴧടߒߚ㧚 (5) MS-13X ߩ NO ๆ⌕ജౣ↢ലᨐߪࡄ࡞ࠬᵄࠍශടߒߚ ࡢࠗࡗ㧙౞╴ဳ෻ᔕེA ߦ߅޿ߡᦨ߽㜞߆ߞߚ㧚⻢ㄉ ታ㛎ߦදജ޿ߚߛ޿ߚጊ↰⧷᣿㧘ᤐฬବᴦਔ᳁ߦᗵ⻢ߔࠆ㧚 ᧄ⎇ⓥߪH17ᐕᐲ⑼⎇⾌⵬ഥ㊄ߩഥᚑࠍฃߌߡⴕࠊࠇߚ߽ߩ ߢ޽ࠆ㧚 ෳ⠨ᢥ₂

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