2 4 7 Vol. 4 No. 7 2 0 0 3 7 Techniques and Equipment for Environmental Pollution Control Jul. 2 0 0 3 ( 510640) 2 (VOC) Catalysis2assisted non2thermal plasma technique for exhaust gas control Guo Yufang Ye Daiqi (Department of Environmental Science and Engineering College of Paper Making and Environmental Engineering South China University of Technology Guangzhou 510640) Abstract Catalysis2assisted non2thermal plasma technique becomes significant due to its advantages such as less energy consumption lower cost higher removal efficiency no secondary pollution etc. The research and applica2 tion development of the technique in VOCs disposal removal engine off2gases purification or else are summed up. The application prospect of this technology in the field of environmental protection is proposed. Key words non2thermal plasma ; catalysis ; synergistic effect ; exhaust gas control ; VOCs 1 ( SO 2 VOCs H 2 S ) 2 2 [1 3 ] Shigeru Fu2 ( non2thermal tamura [4] O 3 plasma catalysis) MnO 2 ; K1 P1 Franeke [5] : 20 % DCE( ) ; CO 2 ; 70 % DCE ; CO 2 ; 90 % ; ; : 5 % ; : 2002-11 - 21 ; : 2003-01 - 14 : (1980 ) :
42 4 DCE CO 2 Stefan Brger 5 [6] 140 BaTiO 3 SrTiO 3 NbTiO 3 [9 ] ; 70 % (afterglow) ( ) : ( ) [10 ] [7 ] ( 5 500 nm 100 m 2 Πg) 1 s : ( ) ; ; 300 ; 2 [8 ] ( ) - 3 CO 2 NO 2 N 2 O O 3 Co Cu Cr Ni V PtΠAl 2 O 3 PdΠAl 2 O 3 Rh RhZnO 2 FeO 2 O 3 14 ] [15 ] [11
7 : 2 43 [16 18 ] 1 HAP CO 2 (mol %) (CO + CO 2 ) (mol %) 2 311 ( VOC) Shigeru Futamura [4 ] ( HAP) O 3 MnO 2 O 3 MnO 2 30 % MnO 2 HAP HAP CO 2 Π HAP 94 % BaTiO 3 CO x CO 2 K1P1Francke [20 ] N 2 O 50 ; VC ( ) N 2 O 1 HAP 75 % 99 % DCE ( ) 44 % 69 % CO 2 CO 34 % 120 CO 2 BaTiO 3 17 % VC DCE O 2 CO CO x 6 % 10 W hπm 3 (STP) VC HAP DCE 80 % Misook Kang [19] ΠTiO 2 90 % 3 % PLAZCAT 2 1000 mgπm 3 13 kv TiO 2 40 % ; 90 % 98 % TiO 2 ΠO 2 13 kv : 7000 m 3 Πh ; 120 min 70 %; O 2 TiO 2 80 % ; 1420 mm 1027 mm 990 mm ; 2Al 2 O 3 80 % 90 % 98 % ; 700 Pa ; 120 420 kg ; 50 ; 2500 W ; [3 ] 4500 CuO Pd Pt 2 50 500 mlπmin 2000 20 000 mgπm 3 70 % 95 % 110 mgπh ; 90 % 9918 % CO 312 B1S1Rajanikanth [21 ] 93 % 250 ; NO (Al 2 O 3 BaTiO 3 Al 2 O 3 + Pd) BaTiO 3 CO 2 Π (CO + CO 2 ) PhH 32 0151 79 0146 CH 2 = CH 2 30 0146 98 0138 CH 3 Cl 21 0133 76 0128 CCl 4 32 0122 59 0113 Cl 3 C2CH 3 21 0146 96 0132 Cl 2 C = CHCl 43 0139 99 0130 Cl 2 C = CCl 2 29 0145 98 0130 CH 3 Br 16 0137 73 0132 CH 2 Br 2 17 0127 95 0125 CH 3 CH 2 Br 21 0145 61 0137
44 4 NO O 2 N 2 NO N 2 313 NO 265 mgπm 3 NO 99 % ( 90 % NO O 2 CO 2 N 2 ) Pd Al 2 O 3 NO systems) 65 % NO 300 92 % 96 % ( EPA ) 40 % [23 ] 40 50 Stefan Brger [6 ] 100 250 ; V 2 O 5 2WO 3 ΠTiO 2 : ( 82 %N 2 13 %O 2 5 %H 2 O 500 mgπm 3 500 mgπm 3 NH 3 ) 140 ; ; 70 % 100 170 mgπ m 3 NO 110 mgπm 3 NO 2 60 mgπ m 3 NH 3 NO NO 2 2 : 2 4NO + 4NH 3 + O 2 4N 2 + 6H 2 O (1) 6NO 2 + 8NH 3 7N 2 + 12H 2 O (2) 2NO 2 + 2NH 3 N 2 + H 2 O + NH 4 NO 3 (s) (3) N + NO N 2 + O (4) NH 2 + NO N 2 + H 2 O (5) NH 2 + NO 2 N 2 O + H 2 O (6) O + NO NO 2 (7) K1 P1 Franeke [5 ] 120 53 NO 2 mgπm 3 20 % ; NO 2 N 2 40 % ; 80 % : + NO + O 2 + HC NO 2 + HC (8) + NO 2 + HC N 2 + CO 2 + H 2 O (9) NO NO 2 ; Hans Miessner [25 ] SCR 20 % NO ; NO NO 2 ; Al 2 O 3 50 %NO ; ZrO 2 80 % NO N 2 Kathi Epping [22 ] ( EPA) (plasma2assisted catalyst HC CO HC CO 1000 900 6 < 80 < 200 < 110 [24 ] NO O 2 NO 30 ev
7 : 2 45 300 20 000Πh 500 mgπm 3 NO CO 3 CO 2 ; CO 2 CO O 2 C 3 H 6 CO O 2 3 2 O 2 ; CO O 2 CO CO 2 HC O 2 249 813 13 915 434 0 812 0 914 428 C 3 H 6 0 2 712 0 1017 404 C 3 H 6 0 2 719 0 917 190 4 ; :600 LΠh (STP) ( GHSV 10 000Πh) ; :15 W hπm 3 ; :250 ; :112 LΠh (STP) 314 Fujitsu 2 100 1 gπm 3 99 % [1 ].. 2001 21 (6) :324 327 [2 ]. Plasmacat. 2001 22 (2) :201 210 80 000 OU ( [3 ]. ) 100 OU 9919 % ;. 1999 12 ( ) :179 185 800 mgπm 3 [ 4 ] Shigeru Futamura Aihua Zhang Hisahiro Einaga et al. In2 volvement of catalyst materials in nonthermal plasma chemical processing of hazardous air pollutants. Catalysis Today 2002 72 :259 265 [26 ] 10-9 s [5 ] K. P. Francke H. Miessner R. Rudolph. Plasmacatalytic pro2 CO 2 CO cesses for environmental problems. Catalysis Today 2000 59 : 411 416 [6 ] Stefan Brger Thomas Hammer. Selective catalytic reduction of SO 2 700 nitrogen oxides by combining a non2thermal plasma and a LΠh 90 % 217 W hπm 3 V 2 O 5 2WO 3 ΠTiO 2 catalyst. Applied Catalysis B : Environmental [27 ] 2000 28 :101 111 [7 ] Uniko Urashima Jen2Shih Chang. Removal of volatile organic CO 2 CO compounds from air streams and industrial flue gases by non2 CO 2 CO 2 thermal plasma technology. IEEE Transactions on Dielectrics ; and Electrical Insulation 2000 7 (5) :602 614
46 4 [8 ] Toshiaki Yamamoto Chapel Hill N. C. Methods and appara2 tus for controlling toxic compounds using catalysis2assisted non2 thermal plasma. United States Patent 5609736 Mar. 11 1997 [9 ].. alytic system. Journal of Molecular Catalysis A : Chemical 1997 9 (5) :449 454 [10 ] Chang2jun Liu Gheorghi P. Vissokov Ben W.2L. Jang. Cata2 lyst preparation using plasma technologies. Catalysis Today 2002 72 :173 184 [11 ]. SO 2 403 CO 2. 1996 36 (1) :47 [ 21 ] B. S. Rajanikanth Satyabrata Rout. Studies on nitric oxide re2 50 moval in simulated gas compositions under plasma2dielectricπ [12 ]. SO 2 NO catalytic discharges. Fuel Processing Technology 2001 74 :. 1994 22 (1) : 177 195 17 22 [ 22 ] http :ΠΠwww. ott. doe govπsuccess. html [13 ].. [23 ].. 1995 21 (3) :25 29 00231748. 6 2001 [14 ]. NO [24 ] Penetrante et al. Plasma2assisted catalytic storage reduction. 1997 17 (4) :369 372 system. United States Patent 6038853 March 21 2000 [15 ]. [ 25 ] Hans Miessner Klaus2Francke Rolf Rudolph. Plasma2en2 NO. hanced HC2SCR of in the presence of excess oxygen. 2002 3 (3) :56 59 [16 ]. [26 ].. ( ). 2000 28 (5) :98 2001 40 (4) :364 367 100 [17 ] M. ArifMalik. CFC2 [27 ]. CO 2 113 CCl 4. 1999 20 (5) :53 54 [18 ]. CH 2 Cl 2. 1997 18 (5) :62 95 [19 ] Misook Kang Bum2Joon Kim Sung M. Cho et al. Decomposi2 tion of toluene using an atmospheric pressure plasmaπtio 2 cat2 2002 180 :125 132 [20 ] K. P. Francke H. Miessner R. Rudolph. Cleaning of air stre2 ams from organic pollutants by plasma2catalytic oxidation. Plasma Chemistry and Plasma Processing 2000 20 (3) :393 Applied Catalysis B : Environmental 2002 36 :53 62 CO. 1999 25 (4) :41 42 ( : ) 2003 ( ) 2003 6 27 29 2003 ( ) 11 7 9! : : : 020-87636108 E2mail : yfzl fair @21cn. com