Catalysis2assisted non2thermal plasma technique for exhaust gas control

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2 4 7 Vol. 4 No. 7 2 0 0 3 7 Techniques and Equipment for Environmental Pollution Control Jul.

1 2 4 7 Vol. 4 No Techniques and Equipment for Environmental Pollution Control Jul ( ) 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 ) 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 % ; : ; : : (1980 ) :

2 42 4 DCE CO 2 Stefan Brger 5 [6] 140 BaTiO 3 SrTiO 3 NbTiO 3 [9 ] ; 70 % (afterglow) ( ) : ( ) [10 ] [7 ] ( 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

3 7 : 2 43 [16 18 ] 1 HAP CO 2 (mol %) (CO + CO 2 ) (mol %) ( 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 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 ; kg ; 50 ; 2500 W ; [3 ] 4500 CuO Pd Pt mlπmin 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 CH 2 = CH CH 3 Cl CCl Cl 3 C2CH Cl 2 C = CHCl Cl 2 C = CCl CH 3 Br CH 2 Br CH 3 CH 2 Br

4 44 4 NO O 2 N 2 NO N NO 265 mgπm 3 NO 99 % ( 90 % NO O 2 CO 2 N 2 ) Pd Al 2 O 3 NO systems) 65 % NO % 96 % ( EPA ) 40 % [23 ] Stefan Brger [6 ] ; V 2 O 5 2WO 3 ΠTiO 2 : ( 82 %N 2 13 %O 2 5 %H 2 O 500 mgπm mgπm 3 NH 3 ) 140 ; ; 70 % 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 H 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 ] 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 < 80 < 200 < 110 [24 ] NO O 2 NO 30 ev

5 7 : Πh 500 mgπm 3 NO CO 3 CO 2 ; CO 2 CO O 2 C 3 H 6 CO O O 2 ; CO O 2 CO CO 2 HC O C 3 H C 3 H ; :600 LΠh (STP) ( GHSV Πh) ; :15 W hπm 3 ; :250 ; :112 LΠh (STP) 314 Fujitsu gπm 3 99 % [1 ] (6) : [2 ]. Plasmacat (2) : OU ( [3 ]. ) 100 OU 9919 % ; ( ) : 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 : [26 ] 10-9 s [5 ] K. P. Francke H. Miessner R. Rudolph. Plasmacatalytic pro2 CO 2 CO cesses for environmental problems. Catalysis Today : [6 ] Stefan Brger Thomas Hammer. Selective catalytic reduction of SO 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 ] : [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 (5) :

6 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 Mar [9 ].. alytic system. Journal of Molecular Catalysis A : Chemical (5) : [10 ] Chang2jun Liu Gheorghi P. Vissokov Ben W.2L. Jang. Cata2 lyst preparation using plasma technologies. Catalysis Today : [11 ]. SO CO (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 : (1) : [ 22 ] http :ΠΠwww. ott. doe govπsuccess. html [13 ].. [23 ] (3) : [14 ]. NO [24 ] Penetrante et al. Plasma2assisted catalytic storage reduction (4) : system. United States Patent March [15 ]. [ 25 ] Hans Miessner Klaus2Francke Rolf Rudolph. Plasma2en2 NO. hanced HC2SCR of in the presence of excess oxygen (3) :56 59 [16 ]. [26 ].. ( ) (5) : (4) : [17 ] M. ArifMalik. CFC2 [27 ]. CO CCl (5) :53 54 [18 ]. CH 2 Cl (5) :62 95 [19 ] Misook Kang Bum2Joon Kim Sung M. Cho et al. Decomposi2 tion of toluene using an atmospheric pressure plasmaπtio 2 cat : [20 ] K. P. Francke H. Miessner R. Rudolph. Cleaning of air stre2 ams from organic pollutants by plasma2catalytic oxidation. Plasma Chemistry and Plasma Processing (3) :393 Applied Catalysis B : Environmental :53 62 CO (4) :41 42 ( : ) 2003 ( ) ( ) ! : : : E2mail : yfzl com

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