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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 356-706, 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 0.502 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. karus@hanse.ac.kr 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

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. 2. 2.1. 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. 2.2. 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).

ƒ GASTEX ƒ» ƒ w ƒ d w. 3. š üy wƒ w y k p 93 3.1. y y y k yw z 750-850 C 30-90 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 0.235 cm 3 /g 850 C 90 y y w 0.502 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 750-30 AC 750-60 AC 750-90 AC 800-30 AC 800-60 AC 800-90 AC 850-30 AC 850-60 AC 850-90 Surface area (m 2 /g) 512 603 735 536 652 827 751 797 1021 Ttal pre vlume (cm 3 /g) 0.235 0.294 0.382 0.266 0.325 0.401 0.378 0.371 0.502 Average pre size (ç) 19.2 19.3 19.5 19.2 19.4 19.5 19.6 19.6 19.8 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

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 99.9 950 10.0 22 850 C 2 hr 99.9 970 10.2 25 850 C 3 hr 99.7 1000 10.6 29 850 C 4 hr 99.5 1035 10.9 33 w. w w y w 850 C y y 60 4 22% 33% j ƒw. wr y k ƒ Ú r y y 4 ù z 99.5% wš. 3.2. y k ƒ p 3.2.1. y k ƒ p Fig. 6 Fig. 7 850 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. 3.2.2. r» ü p ü y s œ ù œ» y y

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 0.502 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 3 3.0 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), 31-33. 2. B.O. Brks, G.M. Utter, Ja.A. Debry, and R.D. Schimke, Clinical Txiclgy, 1991, 29(3), 315-374.

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