Capture of Volatile Hazardous Metals Using a Bed of Kaolinite

Hee-Chul Yang; Jong-Sung Yun; Mun-Ja Kang; Joon-Hyung Kim; Yong Kang

Korean Journal of Chemical Engineering, Vol.16, No.5, 646-653, September, 1999

DOI10.1007/BF02708146 Export Citation

Capture of Volatile Hazardous Metals Using a Bed of Kaolinite

Hee-Chul Yang^{1, †}, Jong-Sung Yun^{1, 2}, Mun-Ja Kang^{1, 3}, Joon-Hyung Kim^{1, 3}, and Yong Kang^{1, 2}

¹Nuclear Fuel Cycle R & D Group, KAERI, Taejon, Korea
²Department of Chemical Engineering, Chungnam National Univ., Taejon, Korea
³, Korea

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One of the promising technologies for reducing metals emission from the waste thermal process is the capture of vapor-phase metals through the use of solid sorbents. This study investigated the use of natural kaolinite for the removal of several volatile metals. The capture of cadmium and lead using a packed bed with porous kaolinite of the size range 300-400 ㎛ was effective. The capturing efficiency increased as the bed temperature increased. The ratio of the sorption reaction rate to the diffusion rate varied on the 10^-2 order of magnitude. This suggests that the resistance of the diffusion within the pores of kaolinite particles is not significant in the selection of sorbent particle size for practice. The capturing mechanism for cadmium chloride is different from that for lead chloride. Cadmium can be reactively scavenged by CdO·Al₂O₃·2SiO₂ as well as metakaolinite, suggesting that a unit mole of metakaolinite can ultimately capture two moles of cadmium.

Keywords:Capture of Vapor Phase Metal;High Temperature Sorption Bed;Metakaolinite;Effectiveness Factor;Lead and Cadmium Sorption Reaction

[References]

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Davison RL, Natusch DFS, Wallace JR, Environ. Sci. Technol., 8, 1107 (1974)
Ghosh-Dastidar A, Mahuli S, Agnihotri R, Fan LS, Environ. Sci. Technol., 30, 447 (1996)
Ho TC, Tan L, Chen C, Hopper JR, AIChE Symp. Ser., 87, 118 (1991)
Ho TC, Chen C, Hopper JR, Oberacker DA, Combust. Sci. Technol., 85, 101 (1992)
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Mahuli S, Agnihotri R, Chauk S, Ghosh-Dastidar A, Fan LS, Environ. Sci. Technol., 31, 3226 (1997)
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Park HC, Moon H, Korean J. Chem. Eng., 1(2), 165 (1984)
Perry RH, Green D, "Perry's Chemical Engineers, Handbook," McGraw-Hill, Inc., 6(3), 285 (1984)
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Uberoi M, Shadman F, AIChE J., 36, 306 (1990)
Uberoi M, Punjak WA, Shadman F, AIChE J., 35, 1186 (1989)
Uberoi M, Punjak WA, Shadman F, Prog. Energy Combust. Sci., 16, 205 (1990)
Uberoi M, Shadman F, Environ. Sci. Technol., 25, 1285 (1991)
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Wouterlood HJ, Bowling KM, Am. Chem. Soc., 13, 93 (1979)
Wu B, Jaanu KK, Shadman F, Environ. Sci. Technol., 29, 1660 (1995)
Yang HC, Kim JH, Oh WJ, Park HS, Seo YC, Environ. Eng. Sci., 15, 299 (1998)
Yang HC, Kim JH, Seo YC, Kang Y, Korean J. Chem. Eng., 13(3), 261 (1996)
Yang HC, Seo YC, Kim JH, Park HH, Kang Y, Korean J. Chem. Eng., 11(4), 232 (1994)

[Referenced By]

[1] Chang HN, Korean J. Chem. Eng., 1(1), 43 (1984)

[2] Davison RL, Natusch DFS, Wallace JR, Environ. Sci. Technol., 8, 1107 (1974)

[3] Ghosh-Dastidar A, Mahuli S, Agnihotri R, Fan LS, Environ. Sci. Technol., 30, 447 (1996)

[4] Ho TC, Tan L, Chen C, Hopper JR, AIChE Symp. Ser., 87, 118 (1991)

[5] Ho TC, Chen C, Hopper JR, Oberacker DA, Combust. Sci. Technol., 85, 101 (1992)

[6] Ho TC, Wang SK, Hopper JR, "Effects of Chlorine and Sulfur on Metal Capture by Sorbents during Fluidized Bed Incineration," Proc. of 1996 International Conf. on IT3, Savannah, Georgia, U.S.A., 415 (1996)

[7] Lee HT, Ho TC, Hsiao CC, Bostick WD, "Study of Metal Volatilization from Contaminated Soil in a Fluidized Bed Incinerator," Proc. of 1996 International Conf. on IT3, Savannah, Georgia, U.S.A. 561 (1995)

[8] Linak WP, Wendt JOL, Prog. Energy Combust. Sci., 19, 145 (1993)

[9] Mahuli S, Agnihotri R, Chauk S, Ghosh-Dastidar A, Fan LS, Environ. Sci. Technol., 31, 3226 (1997)

[10] Moon SK, Sung WY, Korean J. Chem. Eng., 2(1), 45 (1985)

[11] Palmer SAK, Breton MN, Nunno TJ, Sulivan, Supreant NF, Thermal Destruction/Recovery Process, Metal/Cyanide Containing Wastes: Treatment Technologies, 532 (1998)

[12] Park HC, Moon H, Korean J. Chem. Eng., 1(2), 165 (1984)

[13] Perry RH, Green D, "Perry's Chemical Engineers, Handbook," McGraw-Hill, Inc., 6(3), 285 (1984)

[14] Satterfield CN, "Heterofeneous Catalysis in Industrial Practice," McGraw-Hill, Inc., 2, 471 (1993)

[15] Scotto MA, Peterson TW, Wendt JOL, "Hazardous Waste Incineration: in Situ Capture of Lead by Sorbent in a Laboratory Down-Flow Combustor," 24th International Symposium on Combustion, The Combustion Institute, Pittsburgh, 1109 (1992)

[16] Sherwood TK, Pigford RL, Wilke CR, "Mass Transfer," MaGraw-Hill Chemical Engineering Series, 319 (1975)

[17] U.S. DOE, "Simultaneous High-Temperature Removal of Alkali and Particulates in a Pressurized Gasification System," FE-3245-9, 115 (1978)

[18] Uberoi M, Shadman F, AIChE J., 36, 306 (1990)

[19] Uberoi M, Punjak WA, Shadman F, AIChE J., 35, 1186 (1989)

[20] Uberoi M, Punjak WA, Shadman F, Prog. Energy Combust. Sci., 16, 205 (1990)

[21] Uberoi M, Shadman F, Environ. Sci. Technol., 25, 1285 (1991)

[22] U.S. EPA, "Operational Parameters for Hazardous Waste Combustion Devices," EPA/625/R-93/008, 62-63 (1993)

[23] Vidic RD, "Removal of Mercury from the Stack Gases by Active Carbon," 21th Annual RREL Research Symposium, EPA/600/R-95/012, 103 (1995)

[24] Wouterlood HJ, Bowling KM, Am. Chem. Soc., 13, 93 (1979)

[25] Wu B, Jaanu KK, Shadman F, Environ. Sci. Technol., 29, 1660 (1995)

[26] Yang HC, Kim JH, Oh WJ, Park HS, Seo YC, Environ. Eng. Sci., 15, 299 (1998)

[27] Yang HC, Kim JH, Seo YC, Kang Y, Korean J. Chem. Eng., 13(3), 261 (1996)

[28] Yang HC, Seo YC, Kim JH, Park HH, Kang Y, Korean J. Chem. Eng., 11(4), 232 (1994)