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1 w y wz 9«( 2y) 91~96, 2006 J. f the Krean Sciety fr Envirnmental Analysis üy wƒ w y k p ½» w w œw Adsrptin Prperties f the Activated Carbns fr Remving Harmful Gases in Indr Envirnments In-Ki Kim Department f Material Science & Engineering, Hanse University, Haemimyen Sesan Chungnam , Krea Activated carbns fr remving harmful gases in indr envirnments were prepared by impregnating granuled activated carbns frm ccnut chars int HCl and NaOH slutins. BET surface area f the activated carbns after 4 hurs activatin at 850 C were 1035 m 2 /g. And the activated carbns had ttal pre vlume f m 3 /g and average pre size f 19ç. Adsrptin capacities f the HCl-impregnated activated carbns were 6.9 g/100 g-ac fr (CH 3 N gas f 10 ppm and 3.0 g/100 g-ac fr NH 3 gas, respectively, which were 3~7 times larger than that f nn impregnated activated carbns. Adsrptin capacities f the NaOH-impregnated activated carbns shwed 33 g/100 g-ac fr H 2 S gas f 10 ppm and 8 g/100 g-ac fr CH 3 SH gas, respectively, and these values were 5~18 times higher than that f nn impregnated activated carbns, as well. Impregnated activated carbns rapidly adsrbed harmful gases in the adsrptin bx f 1m 3 vlume, which crrespnds t living indr envirnments. Especially, the cncentratin f H 2 S gas decreased frm 100 ppm t 1.2 ppm after 60 minutes adsrptin, which means adsrptin efficiency f 98.8%. Key wrds: Impregnated activated carbn, adsrptin, indr gases, H 2 S, CH 3 SH, (CH 3 N, NH 3 1. qp w ƒ,, ü w w m, ƒ v,» ƒ y x 1) w ƒw š. x ù ƒ y ü {»yw 900ƒ š š 2) Rbinsn 3) w 24 88% üœ š z, 4) z 5) w š. w ü» w w ù mt» l w m š 6) w ü œ» yw T whm crrespndence shuld be addressed. š. 7) x ü yw ƒ y k p w. y k {»yw w ƒ š VOCs w w p ƒ š. VOCs y j» y k ü»œü wš y k y. w y k k ƒ ƒ š ƒ ù» ƒ w z yw. w y k t y w j» w ƒ t, y k w k y k y w

2 92 ½» š. 8~14) y k w ƒ w ù e š. 15~18) ü y w wƒ w y k w» w ƒk l y k š y y w z HCl NaOH g. š t w ƒ w w» ƒ H 2 S CH 3 SH š (CH 3 N, NH 3 w p w ü y wƒ y k sƒwš w y y y ƒ y k. x, y y w w» w ƒk y k gk ve 95 C y w x» w 1cm ¼ x y k xw. xy k w { j» w 105Û5 C» 1 gš y y w» w» š 4 C 850 C¾ jš» 10 ml/min 30~90 y y g. y y e y k w» w» w y k 1 g 500 ml wš 105 C» 1 w. HCl, NaOH š ƒƒ 5 wt % w. e w š 5 wt % ƒ 500 ml y k 10 g š 6 e w z» w y k wš 105Û5 C» 6 w ƒ x ƒ» H 2 S CH 3 SH š (CH 3 N NH 3 4. ƒ y k y y d ƒ ù w. ƒ ƒ y w y k» w KSM 1802 y k x w x w. U y k 5 g š 25 C w ƒ ƒ 1 m k z m z y d w ƒ w. wr s ü y w y k» w» y k ƒ wì ü y wš ƒ y d w.» 1m 1m 1m j w š» ü wš w ƒ 100 ppm w z 5g y k z z Fig. 2. Schematic diagram f adsrptin experimental system (1. sample 2. U tube 3. water bath 4. vent 5. flw meter 6. adsrptin gas). Fig. 1. Schematic diagram f activatin system (1. sample 2. heating element 3. tube furnace 4. alumina tube 5. N 2 gas 6. steam generatr 7. pump 8. water). Fig. 3. Schematic diagram f experimental apparatus fr adsrptin capacity with time (1. sample 2. acrylic bx 3. adsrptin gas 4. gas detectr).

3 ƒ GASTEX ƒ» ƒ w ƒ d w. 3. š üy wƒ w y k p y y y k yw z C y y wš t,»œ v, s³»œ j» d w Table 1 ùkü. y y ƒ 750 C 30 y yw t 512 m 2 /g š y y 60, 90 t 603 m 2 /g, 735 m 2 /g ƒw. y y 800 C, 850 C t j ƒw (Table 1 Fig. 4). y y 750 C 800 C 60 ü y y w t j w y y 90 ù t j ƒw. 850 C y y t j ƒ gš p 90 y y w t 1021 m 2 /g.»œ v 750 C 30 y y w cm 3 /g 850 C 90 y y w cm 3 /g j ƒw š t ƒ w ƒw y w. wr»œj» 19络 x.»œ w ü y w w ƒ»ƒ j» š w w»œ ƒ x. Fig. 5 y y ùkü. y k j w ùkû. y y y y ƒw Table 1. BET Characteristics f activated carbns. Sample AC AC AC AC AC AC AC AC AC Surface area (m 2 /g) Ttal pre vlume (cm 3 /g) Average pre size (ç) Fig. 4. Variatin f BET surface areas with activatin temperature and time. Fig. 5. Variatin f AC yields with activatin temperature and time. y k t»œ ƒw» y y k w ƒw. y y 30 y y j ùkü y y 30, 60 ƒw j s š 850 C 90 y y w 30% j w. wr t p ƒ w 850 C y y w y y 4 ¾ p d w Table 2 ùkü. 850 C 60 y yw 950 mg/ g š y y 2 4 ƒ j 970 mg/g 1035 mg/g j ƒw y k w y

4 94 ½» Table 2. Adsrptin prperties f activated carbns with activatin time. Activatin Item Hardness (%) I 2 Adsrptin (mg/g) ph Benzene Adsrptin (%) 850 C 1 hr C 2 hr C 3 hr C 4 hr w. w w y w 850 C y y % 33% j ƒw. wr y k ƒ Ú r y y 4 ù z 99.5% wš y k ƒ p y k ƒ p Fig. 6 Fig C 4 y yw y k NaOH HCl k y k ƒ wƒ sx ùkü. HCl k» ƒ NH 3 (CH 3 N w» w š NaOH k e l y w ƒ H 2 S CH 3 SH w» w. y k ù y k ƒ ƒ ƒ ƒw f œm. w w y k ƒ ù ƒ w» ƒ y k w» q. y k y k ƒ w j ƒ w. 10 ppm» ƒ (CH 3 N w y k 1 g/100 g-ac HCl y k 6.9 g/100 g-ac ƒw j w. 10 ppm w ƒ 3.0 g/100 g- AC (CH 3 N w d ù y k w y w 0.12 : 0.18 (CH 3 N w ƒ ùkû. y k ƒ w NaOH y k Fig. 6. Variatin f adsrptin amunt f basic gases with gas cncentratin. Fig. 7. Variatin f adsrptin amunt f acidic gases with gas cncentratin. (Fig. 7) w y k H 2 S 1.8 g/100 g-ac. w NaOH y k ƒ ƒ j w. 10 ppm ƒ w y k 1.8 g/100 g-ac H 2 S ƒ w NaOH y k H 2 S 33 g/100 g-ac 18 j ƒw. ƒ j yw p CH 3 SH š j. w ƒ ƒ j 1 ppm CH 3 SH H 2 S 10 ùkû r» ü p ü y s œ ù œ» y y

5 üy wƒ w y k p 95 z ƒ 60 z H 2 S 1.2 ppm 98.8% z ùkü. 4. Fig. 8. Variatin f residual amunt f basic gases with adsrptin time. Fig. 9. Variatin f residual amunt f acidic gases with adsrptin time. w w œ y k ü w w ƒ ù z w ƒƒ w. y k w p» w 100 ppm ƒ 1 m 3» ü 10 g y k š û» ü w ƒ d w Fig. 8 ùkü. HCl y k w» ƒ» l ù 5 50% ¾» ü ƒ y w. z û w w. 60 z (CH 3 N ƒ 9 ppm û w y k 21 ppm. NaOH y k NH 3 (CH 3 N ƒ Fig. 9 ù kü. ƒ» ƒ w ü y wƒ w y k w» w ƒk y k wš y yw z HCl NaOH y k t p wƒ w s ƒw. 1. y k y y t»œ ƒw. 850 C y y ƒ p 850 C 30 y y t 751 m 2 /g š 4 y y t 1035 m 2 /g j ƒw.»œ m 3 /g š s³»œ 19络 x. 2. HCl- y k 10 ppm (CH 3 Nƒ 6.9 g/100 g-ac, NH g/100 g-ac w ùkûš y k w y w NH 3. w y k w 3-7 w. 3. NaOH- y k 10 ppm H 2 S ƒ 33 g/100 g-ac, CH 3 SH ƒ 8 g/ 100 g-ac w š y k w 5-18 w ùkü. 4. üy w» w 1 m 3 j»» ü y k w ƒ» w š û w. HCl y k» 100 ppm (CH 3 N ƒ 60 z 9 ppm û š w y k 21 ppm. NaOH y k NH 3 (CH 3 N ƒ 100ppm H 2 Sƒ 60 z 1.2 ppm 98.8% z ùkü. š x 1. ½, œ» yþ œwz, 1995, 24(1), B.O. Brks, G.M. Utter, Ja.A. Debry, and R.D. Schimke, Clinical Txiclgy, 1991, 29(3),

6 96 ½» 3. Rbinsn. J., and W.C. Nelsn, 1995, Natinal human activity pattern survey data base, US EPA, Research triangle park, NC. 4. ½x, 2004, z, 51, w. 5. ½,, 2005, ü, 5-8,. 6. Yng Hee Lee, Jeng Ah Yim and Hn Yi, J. f the Institute f Cnstructin technlgy, 2005, 24(2), Hyen-Ku Park, Jng-H Kim and Seng-Sek G, J. f the KOSOS, 2006, 21(2), M. Dming-Garcia, A.J. Grszek, F.J. Lpez-Garzn and M. Perez-Mendza, Applied Catalysis A: General 233, 2002, F. Steckli, A. Guillt and A.M. Slasli, Carbn, 2004, 42, J.P. Budu, Carbn, 2003, 41, J.P. Budu, M. Chehimi, E. Brniek, T. Siemieniewska and J. Bimer, Carbn, 2003, 41, , š, ywœw, 1998, 36, y, ½ ³, ½, š, ywœw, 1998, 4, Yen Jae Kim, Jun Gul Ju, Sung Ki Ch and Dnguk Kim, Applied Chemistry, 2003, 7(2), , š, ½, y, š, ywœw, 1997, 3, y,, ywœw, 1997, 3, Suk-Ki Lee, Yeng-Seng Park, J. f Krean Sciety f Envirnmental Engineers, 2000, 22(5), Jung-Dae Lee, Suk-Hyun Ju, Sang-Chul Jung and H- Geun Ahn, Applied Chemistry, 2001, 5(2),

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