以紫外線/二氧化鈦光觸媒程序處理氣相有機污染物反應行為之研究---金屬添加物之影響

全文

(1)

(2)

(3) Treatment of Gas-phase Organic Pollutants in Air Streams By Photocatalytic Process NSC-88-2211-E-011-025 87 8 1

(4) 88 7 31

(5) /

(6) ! " #$%

(7) &'()*+,-.$/0(

(8) *"123!42 5$ 6789: ;<=<

(9) >?!# @?ABCDEF G H I J ! K 2 < ( B CL M $ N O F /

(10) ( P Q ) RSTU!VW$XYZ[\]^_`

(11) $ab*cdef Mg ( ] h i j kX /

(12) ! " # $ lm#@? ;<!nef$% oDm#p : ^ @ q r s e f$ t J u v w x y # z { | } ( t J$@ q r s ~ $ t J ~ kM $ N /

(13) 8 9 ( z ? Z ? q? ! ) TU! PQ) $aOF89 ( cEX2]$pn ! ;< $E^VW !" #(12S*k f /

(14) " 1 2 3 4 2 5 " PQ ) ABSTRACT The heterogeneous photocatalytic degradation of the gas-phase benzene, toluene, and xylene were performed by using photocatalytic process in a continuous flow fixed bed reactor with coated TiO2 and CdS thin films. In order to Investigate the removal and mineralization efficiencies of pollutants, the experiments were performed under various UV light intensities, humidities, gaseous flowrate and coated films of photocatalyst in an annular photoreactor. And the kinetic of photocatalytic reaction was investigated by modeling the photoreactor design equation. The main factors effecting on photooxidation of gas-phase BTX by using UV/TiO2 process are gaseous flowrate, UV light intensities and diameters of the inside and outside of reactor. According to the experimental results, the reaction rate of UV/TiO2 process is limited to mass transfer rate, and is relative to the condition of gaseous flow in the photoreactor. A photoreactor design equation for gaseous UV/photocatalyst process to decompose benzene, toluene and xylene in air was developed by combining the equation of mass balance, energy balance, momentum balance and photo-irradiation. The equation can be simplified and properly describe the experimental results of different UV light intensities and diameters of photoreactor. Key words : UV/photocatalyst process, TiO2, CdS, benzene, toluene, xylene and photoreactor design equation. . L¼½¾^¸ e¹Ge ¿g4¿ gÀgÁg ÂÃÄÅ g!ÆgA A$pÇÈÉ^ ÊËÌÍ $Î%pÏ :ÐÑ^ÒÓ ÔÕLÖ ×d$XØ /

(15) Ùd R S ¸ e ¹G^ÚÛw ÜÝÞ$X ßU#àá. ¡¢£¤ ¥$¦§¨ ©ª« ¬®¯$°g ±²³´µ D¶·¨$ % : X : ( ¸ e ¹ G (Volatile Organic Compounds, VOCs)² ³ º » 1.

(16) 1. b*

(17) $¡â ^ã $·¨ä EäåF$æ¡â çè^é ê¨ë ì¯12Zí^î 1ïâiË ðe¹²³ G$c²³GK2 ëìñò ^2G $óôª"12 õ12 õAAL ¼p0ö

(18) ÷ $øvùú ÜX´µ (1)û üL(2) 2 ý © L(3)þ L(4) AA$ ¼½(

(19) g TiO 2 CdS! ZnOA A$ Þ ø v ¶ 0 ö k. 7. N2. 1. 2.. 3.

(20) 4. 5. 6.. 7.VOC 8.H2O 9. 10. 11. 12. !"#$. 13.GC/FID 14.NDIR 15.%&'. 15. 3. Air. X ç /

(21) ¸ e¹G#$ ^ ²³G * ! " # (BTX)$/ 0 (

(22) * " 1 2 3 (TiO 2 )! 4 2 5 (CdS)$ X 6 7 [

(23)

(24) p¸ e¹G (S! ë $a M

(25)

(26) XRS /

(27) 1 2 ¸ e¹ G $ 6 7 /

(28) ( S $ab*

(29) +z(ij $$O F B C /

(30) 1 2 ^ D ERS67$ô ;<=<

(31) > ?!#@?Ak. 3. 5. 4. 13. 6. 13. 8 3. 11. 11. 12. 10. 3. 9 3. 3. 4. ven. 14. # 1 ]!"# 13. 2.2 ] ) . ¸ e¹G^ dFJ X@ t(#K5 ¸e ¹GL>( MEN$aB CRSO PQÒÓE < $ E < R S * T0.2 U $ e V # K5!eWª(M EN:$X ÒÓ]/ ø=<k]X Jc&'Y (

(32) Z[y '\]$a m'^_ `kK5¸ e¹G( #$ab@ ?QPe¹ G(÷ F= < $ ¶ E < Ò Ó p 30U $ ' c í* 1 ck d 89 eÜ þ $fÚ . g$d8 9æhþ i j NDIR ( mv k l m$a X n O ï o p 1 o 0.5ml # $ * q 5 # r s t u GC/FIDv : Ë s ¸ e ¹ # w <k. ¡ â $ - 2 (#p :^@ qrsF /

(33) ^ B C ì$ B C #m

(34) ( ^ r s$÷N BCÜ#p :^ z?{´ µ$DMcOF nRS 67$Xð #p :^^@ qrsF%p :z?{ ^BC$ am 12 ef( PQ ) $b*cd RS PQ(ij $ R * /

(35) p ] h É^ ùk. . 2. O2. 2.3

(36) & '.

(37) &' x- .$) .*X / ` ( X (1)y o 2.5 ? z W ª Ñ 5 3 ? Pyrex % & { | : (2)} o 0.1g Ë } > (" ~ i )Ñ 5 ª :$X + ç / Ë } > e Ë } (3)B 5 50g " 1 2 3 y L : (4) 2140 2 ^ Z [ ( à z * F " " ¿ )Ñ 5 105U ( 2 ÷ $ o 0 } Ý i j $ Ñ 5 L : - 8 ÷ (5)o 0 Z [ " y K ï (6)æ Ñ 5 105U ( 2 ÷ $ } Ý j ( (7) Ý (4),(5),(6) X m h $ a X Þ

(38) J7yZ[Ék. !". 2.1 ] P ' ^]!"ô# 1 /$$ à z * Pyrex % &$' n 6.5 ( Ë$ ) 45 ( Ë $ ' " * n 2.5 ( Ë ( + , % & -Ñ". /$R0 12°e 34ÚfÒÓ# R5!@0 $b*ç 67/$ 8I:. Ï!9 : / ; # < $ = < > * 1.176 ? $ @ A BCDE<ÒÓ89dE < k UV . F * GTE F15T8/BLB $ 15W $ G 0 ( H ) u v Ë I p 360~370nm k. 2.

(39) ( & ' ) . J p X (3) m X (4)( B 5 z ? ( 4 2 5 $ % ¡XmÉ`¢B£¤^&'). $âZ[Ý? ^¥BQ ¦0pZ [\]É

(40) Ý?k.

(41) 3.2 X /

(42) " #(S]. m7§ 3.1 G þ ] . S](RS $%^p y67 /

(43) J Z e BTX # $ a Ô ð

(44) © ( ßàrs$] JXç ¨R S$* $ /0(.

(45) * " 1 2 3 (TiO 2 $Degussa P-25)! 4 2 5 (CdS$ Greenock ite)$ a X Ï * © D#$p¸ E<^ $ G á Û w < Ë â * 125 ppm 90 ppm " 80ppm$ ã b *. ; < 2.1 mW/cm 2 = < * 5%RH E < 25 U c í 1 atm # @ t 400 ml/min(ä å ÷ 2.94 min)$ G w < ! " 1 2õ¨ë? ÷®2r s$% ô# 2 /$k. ](¨ *7 $X Ï * © D # (carr ier g as) c w < * 70ppmv ( BTX # ç U 5 ª & ' e.

(46) (:$ AdG w<þ( $f«R 01¬$a ÷X n O o p $ f 5 GC/FID ? ! " (w<®2 rsL¡â ] $p

(47) ¯÷^ ÷( '$° § p ¯ = < 6 ± = < ^ $ BTX ^ w <²³é·¨® 2$DM Xµ¶ !" pÏ :·*þ $a¸ ·¨ïð6ªð^¹k M$cw< ( !" #Xç^ )K5& 'e"12 3 (TiO 2 )! 4 2 5 (CdS)

(48) ( :$A d w < þ (e º » )( X 7 ( g )^ ) ? BTX ^ w < ®2rsL] p´ e g ^$"1 23!42 5¼a°

(49) (2b$ °.·¨H I !" #^ $DMp :N ½¾ ! " p g (

(50) 2 B C k ¿ ¦ À (1997 )X ç UV/TiO 2 Á Å # ! Â Ã Ä (1997)X ç UV/TiO 2 ÅÁÅ #$] $ pGº»p

(51) \]^ Æeþ ( $ p ´ e (365nm) g ^ $

(52) ¼a é2( ©$ Gw<p¸¨®2k. 4 50. Conce ntration (ppm). Ben zene. 4 00. U V/T iO 2syst em T em p = 25 ± 1 P r essu re = 1. 0 at m. 3 50. Rel ativ e hu mid ity = 5± 0.2 % 3 65n m U V i nten si ty = 2 .1 m W/ cm2 Ma ss f low rat e = 40 0 m l/m in Car r ier gas : air T iO 2l oadi ng = 8 .06 mg /cm. 3 00. CO 2( Benzen e) Ben zene* CO 2( Benzen e*) T ol uene CO 2( T olu ene) T ol uene* CO 2( T olu ene*) X ylen e. 2. CO 2( Xyl ene) X ylen e* CO 2( Xyl ene*). 2 50 2 00 1 50 1 00 50 0. 0. 20. 40. 60. 80. 1 00. 1 20. Re te ntion ti m e ( m in). UÇM] ô DÈ ÂÃÄg 2G^É! zd6 7$/ÊÂ ÃÄg2GË^ ÈJ!2 ýS*m gÌ^2G$¶ /0 ( !" ¤yMg$°ìe¯ $ÍÎäEÐÏ ^)dÐ $¼ ^ÉìeÑÒ( $DM ìeÃ2 ^b$DM¼ g2 G[%Ó2 Gþ$¶Ô g2G */ï¼ ^wÕÖ$ K½m% Ó2GR So×$óô Ø2 Ù2A A$¶ÚgÌÅg 6ÆgA% Ó2GÕ m%ÓGRSB ë!o× $BÉ ìe±î2C! Û{C^ $ÕR S12Üo$ DM¼Â ÃÄg2 G ì e [ % Ó 2 G Ã ^ (e ¹ 2 ý $1984)$p ¼ ½ E ½ c ^ ¸ ¨ïð6ªð^ rs$DM pÝ^ :½¾M

(53) Þ k. # 2 Xç UV/TiO2 BTX ( S](e*æ×\Ý]) ô#/$$ !" p

(54) ¯ ÷^÷' $X"12 3b*.

(55) µ[ç^HI !K2 $Ô©a ¸ è ± $ p Ú Û > 1 ÷ (> 20 ¯ ä å ÷ )e Ü þ $ G H I J Ë â * 47% 70%! " 65%$ K 2 J (¨ ë " 1 2 õ ^ õ mole m / G á Û é õ mole m )* 32% 51%! " 40%L ¶ X 4 2 5 b *

(56) R S ( ] $ !" °.µÜH I$Né"12 õAK2· G·¨L% oDêJD

(57) æ( 12V /ëë$ Ë 0 (Wold$ 1993)$ X TiO 2 b *.

(58) /RS( 12$ %ZDì (band g ap)* 3.2eV$ ¶ ¨ ë î 1 ï â i / ø ( Ü o ä í * 2.85V $ î ¦ ë

(59) ( Z D ì * 3.0eV$D M ¡ â ã / · ¨(äå ªËE·¨î1ïâ i$æïâî 1ïâið ñe¹G$ 3.

(60)

(61) y k (2) â y / $ / & ' ( " 1 2 3

(62) ¤y ('\ ]$s ë r TiO 2 $D M ('\]<Nù"123 ( © ] <$ / X Ô ' n ® ÷$ " 1 2 3 ^ © ] < È $ û p © í " m ? ® ^ $ / Z º » ^ G m ? e x$ ¡ â ã · ¨ ^ ä E ä å m N e x$ D M ¥ B ;<Faé R^ $ ÷ N è ± ^ / Jk. ¤yäå*12 !î1ïâ i12 e ( V L ¶ X CdS b *

(63) ( 1 2 $ â y % Z D ò (2.4e V)$ óX·¨î1ïâ iðñe¹ G$¤yä å * 1 2$B É CdS ^ \ ] < (© ] < ) · $D M

(64) © [ $º » Z í ó $ UÇô° ^¨ $M$ä EäåÝõ^tJ ö÷NJU Ç ç ^ o D ( $ / µ CdS w ã · ¨^äåøªm GRS ùmäE R S Ý õ $U Ç BTX a ´ e ú H I 6 K 2 $ û p ü ý : c ù ú X CdS b *

(65) (]k 3.3 X /

(66) " (#. 1 .4. ¼ /

(67) ( t JHIJ!K2 JuvwÜ ; <

(68) g =<# 1? GáÛw<þ å÷! #@? AD^BC$ cOF BCDE ^ RS67k. B e nze ne C O2 (B enz e ne) T olue ne C O2 (Tol ue ne) X yl e ne C O2 (Xyl ene ). 1 .2. 1 .0. T i O2 l oa ding =8. 06 m g/c m. C/C0. 0 .8. 3.2.1 ; < * 2(Z?d F$ ;< *B CäEäå F^¨ërs$D ¶BCî1 ïâi^¨ ë$R¶BC (RS$û p:c OF !" #^ GáÛ w<! ;< RS67$ ]ô # 3 /$k. U V/ Ti O2 syst em T e mp = 25± 1 P res sure = 1. 0 a tm R e l at i ve humi di ty = 5± 0.2% C onc . of rea c ta nt = 70± 2 ppm M as s fl owr at e = 400 m l /m in R e t ent i on t im e = 2. 94 m in C a rri er gas : a i r 2. 0 .6. 0 .4. 0 .2. 0 .0. 0. 0. 0. 5. 1 .0. 1. 5. 2. 0. 2. 5. 3. 0. 2. L ight inte nsity ( m W/c m ). # 3 Xç UV/TiO2 BTX$ G ;<®2rs. ¡â# 3 ¶ !" (HIJ!K2J ;<^ ¥B¶¥B$Ôe ¥^ $ p º ; < 2.75 mW/ cm 2 ^ ã b RS]$%HIJËâ* 58% 77%! " 75%$ K 2 J Ë â * 45% 58%! " 47%$ % :$NX ^H I!K2º ç$" h($^HI! K2 º SLâM ¶$ ;<^¥B $

(69) w. gã^ < È~$ä EäåF^ ¨ëBt$R¶B ÷î1ïâ i^¨ët J $ R ^ R S LÎ p ¯ ; < ( y 2.4 mW/c m 2 )÷$ H I ! K 2 e

(70) à ^ $M âä Eäå¨ë !Ýõ^RS$Ë*

(71) (1) p ; < ö ^ $M ÷

(72) w ã·¨^ä E ä å m ö $ F ä E ä å ¨ Ý õ ^ ¹ ¸ ¥$ ä ! { ^ Z í w Ü x Ó$ D M ä Ý õ Ú Û u U ( R S$ Ç / / J ç$ D M H I ! K 2 . ¼ 2 (t Jm ; < ^ 0.5~1.0 h ) ë $p ±. ;<÷$tJm ;<^ 1 h) ë $Ô ;< ö¯÷$M ÷äEäå F^ÝõtJB÷ $äEmä åÕ¨Ý õ^¹$aÔÚ ÛuU ^RS$M ÷tJ4*m ; <^) ë $¶] $ HI!K 2 m ;<² f $DMOF p ; < X UV/TiO 2 BTX # ( t J b ] m $ tJ m ;<^ f²ë f$âM ¶$ //(. ;<p± ;< $DM% tJm ;<^ 1 h)ë $ ûp^V6 7!] VWÔ: P ;<(!h* 1 h)k 3.3.2 = < . 4. ª Ë E p /

(73) : " # mG$%º »X! / î1ïâi ¨ ë ^ Ý v & '$ ¶ % F /

(74) .

(75) 4250ppmv$ ] w = < ^ B C$M* ^óL F^Í¸ e¹G^w< [±÷$ tJw = < 0 Ó ^ B C [ * $ Olga(1998) X UV/TiO 2 ! # $ p±áÛw<^ $ tJ!4 2JwÜ=<B C$ = <^¥B$ tJ!42J(èk. ^BCN$ DM()¦ '*ý æ^7§$%]ô# 4 /$k ¡ â # 4 $ p= < [± ^ $HIJ!42 J¸ =<¥B¶ ¥ B$Î p = < z ö 10%RH $H I J ! 42J ¸ = <¥B¶

(76) à$pºç F = < ^ (= < =10%RH)$ ^ H I J ! K 2 J Ë â * 41%! 36%$ ^ H I J ! K 2 J Ë â * 73%! 45%$ " ^ H I J ! K 2 J Ë â * 65%! 46%$ %:NX ^H I!K2 ºç$" h($^HI!K2 ºSL Ollis(1992) ! Obee(1995)X UV/TiO 2 Ë â á Û w < * 80ppmv ^ " ! 2.13ppmv #(]N+µgÌ k. UV/ T iO 2 sys te m Te m p = 25± 1 Pre ssure = 1. 0 a t m C onc. of be nze ne = 70± 2 ppm. 1. 4. 1. 2. 365nm UV i nte nsi t y = 2.1 mW / cm M a ss flow rat e = 400 ml /m i n R et e nti on t i me = 2. 94 m i n C arri e r ga s : ai r. 1. 0. Ti O2 loa di ng = 8.06 m g/c m. B en ze ne C O2 (B e nz ene ) T olue ne C O2 (T o; uene ) Xyl ene C O2 (X yle ne ). 2. 2. C/ C0. 0. 8. T%oD$ ÈªËE/ "#^& 'BXËs$,y È¹Ó BX7§$ Ô"123#\ ]eªËE º»÷$¡ âªðbp"1 23\]^ ©í"É ·¨-i$R¶m w ã· ¨(äå ¨ëî1ïâi kÎ¼¸ e¹G p 2:$ ./î 6Ñû º»p-iÉ $¶ªËE N¸º»p "123\]É^ -i$ëë ªËEm G^$%º» ¹$D¶0 Ó^R SLDMpG áÛw<! ; <Aãb ^ $Ô=<[ ±÷$ =<^ ¥B$î1 ïâi^¨ ëB÷$¶M÷ª ËEâyw <[±$$ %º»^ [ $DM µX RL ¶ Ô = < [ ¯ ÷$ª Ë E ^ m ö $TiO 2 \]

(77) úªËE 1$ªË E^¥Bc ¸/©í"úª ËE;$ ¶¸ y(RSk. 0. 6. 0. 4. 0. 2. 0. 0. 0. 20. 40. 60. 80. 100. Re la tive hum idity ( % ). # 56X ç 789:;< ! =:>$ GF=<®2rs6 3.3.3

(78) > ? .

(79) (©í" m?m

(80) w ã/ Z·¨^ä Eäåm? e f $ @ Ë 0 UV/TiO 2 (.

(81) >?eºA ?Bp$ c67p Z[É >?^

(82) F( B C $ % ] ô # 5 # 6 ! # 7 / $k. Èº»^ dÐ$ G!ª ËE^w<! º»Zí* uv^ùú D$Í¸e ¹G^w< ·÷$% º»p"123\ ]É^º» ? [$ wªËE$%º» ^ [ $M÷ w=<^BCa $( $Í¸ e¹G^w<k[ ±÷$=< ^ ¸ * B C ^ k Obee A 2 (1995)X UV/TiO 2 $ p # á Û w < * 2.13ppmv ^ ã b $ Ô = < p 2000ppmv X ÷ $ = < ^ ¥B R^ RS$®¯ tJL Î p = < y 5000ppmv ( $ = < ^ ¥ B ¸0Ó^ RS$è± tJ$ bæ3*p±=< ÷$t Jwxyª ËE^º»$Nù wxyî1 ïâi^¨ ë$¶p¯=<÷ $M÷ G^º»Z í[ªËE4$ tJwx yG^ º »kJardim(1994)X UV/TiO 2 Á Å $ % G á Û w < *. 2 .0. UV /T i O2 s yste m 2 B e nze ne (T i O2 = 8. 06 m g/c m ) T em p = 25± 1 2 Pre ss ure = 1.0 a tm C O2 (Ti O2 = 8.06 mg/ cm ) 2 R e la t ive hum i dit y = 5± 0.2% B e nze ne (T i O2 = 12. 58 m g/c m ) C onc . of re a ct an t = 70± 2 pp m 2 C O2 (Ti O2 = 12.58 m g/c m ) M a ss fl owra te = 400 m l/ m in R e te nt ion ti m e = 2.94 mi n C a rrie r ga s : a ir. 1 .8 1 .6 1 .4. C/C0. 1 .2 1 .0 0 .8 0 .6 0 .4 0 .2 0 .0 0. 0. 0. 5. 1 .0. 1. 5. 2. 0. 2. 5. 3. 0. 2. L ight inte nsity ( m W/c m ). # 5

(83) >?$Xç UV/TiO2 $G ;<®2rs # 6

(84) >?$Xç UV/TiO2 5.

(85) 2 .0. :;<] -?@>? @M

(86) - u; <=C D#$GHI { 012 - ¡<¢£. 1 .8. UV /T i O2 s ys te m 2 T ol uene (T i O2 = 8. 06 m g/ cm ) T em p = 25± 1 2 Pre ss ure = 1.0 at m C O 2 (T iO 2 = 8.06 mg/ c m ) R e la t ive hum i dit y = 5± 0 .2% 2 T ol uene (T i O2 = 12. 58 m g/ cm ) C onc . of re a ct ant = 7 0± 2 ppm 2 C O 2 (T iO 2 = 12.58 mg/ c m ) M a ss fl owra te = 400 m l/ mi n R e te nt ion ti m e = 2.94 mi n C a rrie r ga s : a ir. 1 .6 1 .4. C/C0. 1 .2. 3.3.4 ¤ ¥ ¦ . 1 .0. ¥ ( ¥ § )- ¤ 0 1¨

(87) © Wª ¤C «I-¥¬ 2® ¯

(88) -°±²³¦ &<=´ µ¶· -¸¹ºv( »C=` ¼½ ¤-¥¾n01 #$¿ Àª ¤¥§½e ®£D# $CÁÂ Ã ' e BTX ¤ 0 1 C ÄÅÆu ÇÈ¡ÉÊ ¤¥] 200Ë 400 Ë 600Ë 80 0Ë 1000 ml/ min 3 Ì Í 2 j u Ç ] 5.88Ë 2.94Ë 1.96Ë 1.47 7 1.175min 3 # $ % & Î 8 M B £. 0 .8 0 .6 0 .4 0 .2 0 .0 0. 0. 0. 5. 1 .0. 1. 5. 2. 0. 2. 5. 3. 0. 2. L ight inte nsity ( m W/c m ) 2 .0.

(89) 2. UV /T i O2 sys te m T em p = 25± 1 Pre ss ure = 1.0 at m 2 Xyl e ne (Ti O2 = 12.58 mg/ cm ) R e la ti ve hum idi t y = 5± 0. 2% 2 C onc . of re ac t ant = 70± 2 ppm C O2 (Ti O2 = 12. 58 mg/ cm ) M a ss fl owra te = 400 m l/ mi n R e te nti on ti m e = 2.94 mi n C a rrie r ga s : a ir. 1 .8. Xyl e ne (Ti O2 = 8.06 mg/ cm ) 2. C O2 (Ti O2 = 8. 06 mg/ cm ) 1 .6 1 .4. C/C0. 1 .2. Ï Ð Ñ Ò (Bird1960)Ó Ô Õ Ö × U¯¥¤C «I-Ø Ù7« - Ú Û Ø ; ÜÝ Ö × U n r 25 2z ¥¤C«I-¥¬Þr¥ (Lamin ar Flow) ¥ ¤ e j 9 ß à á> Ý Ö × U ¾ r 2100 2z ¥ ¤ C « I - ¥ ¬ ] â ¥ (Turbulent Flow) 3 C « I - ¥ ¬ ã ] ² ä ¥ ¤¯¥¤ej ßàá 9å zWæ<=¼½ DGH e¤ C«I-¥¬ WXY Ö×U-ç è@éê£. 1 .0 0 .8 0 .6 0 .4 0 .2 0 .0 0. 0. 0. 5. 1 .0. 1. 5. 2. 0. 2. 5. 3. 0. 2. L ight inte nsity ( m W/c m ). YrD#$eM!e½»]Jëìe BTX ¤íî]ÉÊ¤<=«I -¤ïî]ðCñÂñò-ØÙ îeóô] 1.29 g/lõö] 0.018 cp ¥¤¤¥] 200~1000 ml/min÷èø¥§] 7.653~38.2653cm/minùúûü] 4cm<=ç è%&Ö×Ukýr 3.6564~18.2803Þr¥ (Laminar Flow)þ<=¤ej-²¦ &ã]; ¾u-¤V7

(90) 01s¥P«<=C01D 2´µ¶·¤¸¹ºv

(91) -§6ø¸¹y- ¡£. 7 UV/TiO2 ! "

(92) # $ % & ' ( TiO2 ) * + , ./01#$2 3456 7869 :;<=>?@ ABCDE FGHI JKLMNOP -Q RSTU 9V<- ?@>?@ =%&W XYNOZL@ [\<] DEFM^ _-JKZL]` ./Ka bJ;"c defgIhiKa2jklmn 2opKa 3 iq"cdfgYr sXt@uv@ !< ="cd Wwx)*C. /y>D EF_? @)*- Zz{? @./C "cdI-Ka iU<= |})*C ./y? @~{ C;-" cdy)* -"c d^ "cd- ?@> -" cdz< "cd* L

(93) <=9]- _; _-"c du{

(94) - @y<] ./- M QRST9. XY#$%& ¤¥(¥§) 4567

(95) 6 e?@ 45>~{ë¥(ÌÍ2j)2+ {<]C; Ã'-ÅÆ+ë -íî¥ÉÊø3ì+ Ï Ð 3.2.1 -#$%& =2- BTX r "cd-+¾(V³ØÙ)< =457

(96) + >C¤¥+ 2 Yr3¤¥§?@Ö×U¾ÏÐ¤¥ ¬-¤r«I-¥¬+] ²ä÷ !"{¤C«ÝI-°± #$%¤C«I¯

(97) e²³ 6.

(98) D

(99)

(100) [\`@?¸PQ Fick’s first law $ Equation of continuity0 ¾(¿) Àv(DAB)rÁÂ567BTX

(101) `@?(7?ÃÄÅÆy ∂CA ∂C v ∂C ∂C + (vr A + θ A + vz A ) ∂t ∂r ∂z r ∂θ 2 1 ∂ ∂CA 1 ∂ C ∂2C = DAB[ (r ) + 2 2A + 2A ] − RA.(3 − 1) ∂z r ∂r ∂r r ∂θ *i DAB D0 i 9 v (L2/sec)CA DÇ(ppmv)RA (mole/sec.L)R?È(<7oN!rÉ Êa<Ë&y (1) o N k l < Ì Í (steady-state)Î Ç9 ¡ ¡Ï(dCA/dt)Ð#: (2)PQhuv9Om§Ñj kli. 9JHIrCÒ{Î vr = 0 vŞ= 0Ó vz = V/ÔV M9Õ ¡Ô +,-: (3)() t9Öh«)×Ø(z `Ø) ÙÚoN×ØRÛrÜ*·1 2·G&: (4)Ý( Peclet Number Om§Ñ×ØR9

(102) °Þ)Vß 19 à ×Ø9Ï1°)°ÏÓ á`ØRÇá`Ø9

(103) : ?(3-1)&Ëy.

(104) ! "#$%&'()*+,-. /$01234567'+,-89 : 1.4. Benzene CO2 (Benzene) Toluene CO2 (Toluene) Xylene CO2 (X ylene). 1.2. C/C0. 1.0. UV /TiO2 system Temp = 25± 1 Press ure = 1.0 atm Relative humidity = 5± 0.2% 2. 365nm U V intensity = 2.1 mW/cm Carrier gas : air 2. TiO 2 load ing = 8.06 mg/cm. 0.8. 0.6. 0.4. 0.2. 0.0. 2 00. 4 00. 6 00. 8 00. 10 00. M a ss f low r at e ( m l/ m in). ; 8 <=>? UV/TiO2 @ABC 1 BTX DEF G&HI 3.4 JKL?$ MNO PQ<RSTUV@A<JWXW

(105) $YZ[\]^_[\`@?a<bc BTX 0defgh? Mi HI: j kl0OmRc9[\`@?!n <7oN: pq0J[\`@?`rs 0 Mi9JHIthuva<wxy D/uL z 0, {(plug flow) D/uL z |, }~(plug flow) *iD uvu Mi. L h8jSTt t Mg h?de M 400ml/min Mi 23.2cm/min 0 Mi < *v D=7.93(McCabe and Smith, 1976)jkl9hu v 7.594910-2{56oNj kl 0 Miu 0J`@?0 kli /O: *0X[\`@?`()j kl0e7!n HI/X ¡ X[\`@?¢90 YZ[\`@?`()jkl£)¤1¥ & kl ¦0§äRj ©ª9«) M¬h® ¯¬0 Mu°j ±/² ³¦´µ¶¯¬0M®R·¸: PQ<R9oN¹ºj kl¦»¼½. vz. ∂C A ∂C A 1 ∂ ∂CA = = D AB ( (r )) − RA ...(3 − 2 ) ∂z ∂τ r ∂r ∂r. â 1ãäåæD9çèé0 êÁ MÞë$·7oN À D ì ã í Ó î ï Langmuir-Hinshelwood ?À¯¬ð ·Wñòv(molar extinction coefficient, ó)$ô(quantum yield,õ)ãí <7?ö9y − R. k I m K. A. = kI. *i. m. εΦ. KC A 1 + KC. ....( 3 − 3 ) A.

(106) . I CA v. ÷ø(3-2)?Å. ∂C A ∂C A = ∂z ∂τ KC A 1 ∂ ∂C A = D AB ( (r )) + kI mεΦ ..(3 − 4) r ∂r ∂r 1 + KC A. vz. 7.

(107)

(108) !

(109) " 1 #$%&'() m *+, -" 1./012

(110) 3 (dCA/d4)5(CA)67

(111) 8"9#$%& '()(3-4):+;<. 40. Reaction rate (Bulk, ppm/min). 35. ∂C A ∂C A 1 ∂ = D AB ( (r )) + kIε Φ KC A ...( 3 − 5) ∂τ ∂r r ∂r. = k "> ?@K "ABCDEF "GH/ε"> IJKLM$N OP&()EG!KLM$NO !+Q kKε+RS" k*T"9#> E ,-U> VW=XY >ZK[Z F \()]ZCD^_:+à3LM$ bc^_:de/fg>h bci:+3j9kl Lambert’s law m no(Jacob and Dranoff1996)< I = I0. Reaction rate (Bulk, ppm/min). Be nz en e T o lu en e X yl en e. 2. 20. 10. 100. 150. 1. 6. 2.0. 2. 4. 2. 8. tUª«

(112) 3LM$/_ ¬p¡§®§K¯®§(BTX)p> °±K² ³LM$´K > pµ¶·(¸ ¹º5»> I °±K² /¼¬p¡®§p ° ±K² ½¾¯®§¿/3§ °± K² ½ÀÁÂÃÄÅ|3¡_ ÆÇÈÉÈ·RI °±K² ÊË ;ÌÍÎRIÏ°±²Ð> ? @·^YFÑe> ËÀÒuÃ BTX UÓ b¸

(113) ÔK> %ÕP&.)MUª« 3 CdS "}Öb×Ø BTX pÙ3 U> VW ¬p¡§®§K¯®§p > @³> pµ¶(µ?)x ¹º ÚÛUª« ÜÝ

(114) > ?@Þßàpµ¶ á{/á{Ñe> p > h= Õâãä¨©Þà¹ºLM $/_ > ?@.µ£å n Öæ> h= > pµ?á{ç> p> h= µ¢è1éêëì¨©È íî-> = ïð)> pÃ añÞá()Ë³òê> pÕâ dY ?@¹º> ?@(/á{. > h-ói^_:}5LM$ K> I012 ¤ > ?@Ã 9¿^ôÊõ"9 ¿> õUª«ÜÝLM$öê÷ øù.3xfg> hLM $/_

(115) > ?@Ã > húMfûg ÊüP&()+3ýL M$Kþ¶"LM$/_ ò(¸.. U V /T i O 2 syst em T e m p. = 2 5 ± 1 P r essu r e = 1. 0a tm R ela ti ve h um i di ty = 5% ± 1. 50. Be nz ene Toluene Xyl ene. . 50. T i O 2 lo ad in g = 8 .0 6 m g /cm. 15. 7 10 3fg> h¥¦: UV/TiO2 p¡§!¢£¤¨ ©. t:(3-7)> p> h= 2 bc"> hx(r)K> l(4) H=v l!> 2+t

(116) ;()5f gx > hLM$K> I012 ii

(117) 7 9 K 10 e. 7 9 3 UV/TiO2 _ p¡ BTX012. 30. 20. Light intensity ( mW/cm2). ∂C A 1 ∂ ∂C A r = DAB ( (r )) − k *I0 ( i )εΦC A..(3 − 7) ∂τ r ∂r ∂r r0. 2. Ti O2l oading = 8.06m g/ cm2. 1. 2. r i − E ( r − ri ) e .......... ..( 3 − 6 ) r. 3 65 n m U V i nt en sit y = 2 .1 m W / cm M ass fl ow r at e = 4 00 m l /m i n R ete nt io n ti m e = 2 .9 4 m in C ar r ier g as = ai r. 25. C onc. of re act ant = 70± 2ppm M ass fl owrat e = 400 ml/ min R ete nt ion ti me = 2. 94 mi n C arrier gas = ai r. 10. = E U> VW="kp 365nm N O! qrAs'tuv*wx() ,- E(r-rI)yz*wx+,-" 0{|U> VW=LM> h= bc}~ > dY() dY +()5f:> hi bci:> h=LM >Z !+;bc" I=I0(ri/r0) (3-6)+;. 40. 30. UV/Ti O2 syst em Te mp = 25± 1 Pressure = 1. 0 atm R ela ti ve humi di ty = 5± 0. 2%. 200. . C on cen tratio n o f reactan t (p pm ). ¢£¤. 8. 1. 3 ¯ Ø p ¡ = Ç > ª« =

(118) å _ å ª « Ï Ä (1997)..

(119) 2. /

(120) !"# $%& '() %*+, -./ 0 (1997)1 3.2 ! 3 4 5 /

(121) ) 6 7 8 9 *+ !"# $%& ' ( ) % * + , - . / 0 (1998)1 4.: ; 4 /

(122) < =*+ !" #$% & ' ( ) % * + , - . / 0 (1998)1 5.> ? @ 4 A B ) 6 7 8 C D E F GHIJ <=K LM <=NO P* +!" QRS T$% %() TU* + , V . / 0 (1998)1 6.W X Y 4 5 /

(123) ) 6 7 8 9 HI J<= KL* +! "QRS T$% %( )TU* +,. / 0 (1998)1 7.Alberici, R. M. and Jardim, W. F., Photocatalytic Degradation of Phenol and Chlorinated Phenols using Ag-TiO2 in a Slurry Reactor., Wat. Res., 8, 1845-1849(1994). 8.Dibble, L. A. and Raupp, G. B., Fluidized-Bed Photocatalytic Oxidation of Trichloroethylene in Contaminated Air Streams, Environ. Sci. Technol., 26, 3, 492-500(1992). 9.Obee, T. N. and Brown, R. T., TiO2 Photocatalysis for Indoor Air Applications : Effects of Humidity and Trace Contaminant Levels on Oxidation Rates of Formadehyde, Toluene and 1,3-Butadiene, Environ. Sci. Technol., 29, 1223-1231(1995) 10.Obee, T. N., Photooxidation of Sub-Parts-per-Million Toluene and Formaldehyde Levels on Titania Using a Glass-Plate Reactor, Environ. Sci. Technol., 30, 3578-3584(1996). 11.Ollis, D. F., Photoreactor for Purification and Decomposition of Air, Photocatalytic and Treatment of Water and Air, 481-494(1993). 12.Serpone, N., Maruthamuthu, P., Pichat, P., Pelizzctti, E., Hidaka, H., Exploiting the Interparticle Eleltron Transfer Process in the Photocatalysed: Chemical Evidence for Electron and Hole Transfer Between Coupled Semiconductors., J. Photochem. & Photobio. A: Chemistry 85, 247-255(1995). 13.Vinodgopal, K. and Kamat, P. V., Enhanced Rates of Photocatalytic Dagradation of an Azo Dye Using SnO2/ TiO2 Coupled Semiconductor Thin Film., Environ. Sci. Technol., 29, 841-845(1995). 14. Wold, A., Photocatalytic Properties of TiO2., Chem. Mater., 5, 280-283(1993).. 9.

(124)