화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.12, No.3, 401-407, May, 2006
Export Citation
Preparation of Na-P1 Zeolite with High Cation Exchange Capacity from Coal Fly Ash
Tae Gong Ryu, Jae Chun Ryu, Choong Ho Choi, Cheol Gyu Kim1, Sung Joon Yoo2, Hyun Soo Yang, and Young Ho Kim†
  • Department of Fine Chemicals Engineering & Chemistry, Chungnam National University, Daejeon 305-764, Korea
  • 1Department of Environmental Engineering, Hanbat National University, Daejeon 305-719, Korea
  • 2BioShield Co. Ltd., Room 2221, HTVC KAIST, Deajeon 305-761, Korea
E-mail:
Na-P1 zeolite having a high cation exchange capacity (CEC) was synthesized from coal fly ash using a modified conversion method into the zeolite by alkali fusion prior to conventional alkali hydrothermal reaction. For comparison, alkali hydrothermal and alkali fusion methods were studied at different conditions using NaOH as an alkali source; the CEC for NH4+ ions was measured with the products under each reaction condition. The results are discussed in terms of the crystal structure of the products. The coal fly ash was converted into the zeolite by an alkali hydrothermal reaction, through the course of Na-P1→ hydroxy-sodalite with increasing NaOH concentration. The coal fly ash was mainly converted into sodium aluminum silicate by the alkali fusion method, without formation of any zeolite crystals. The products of the alkali hydrothermal reaction showed higher CEC values than did those obtained by fusion reactions because of crystal formation of Na-P1 zeolite. The coal fly ash was effectively converted into Na-P1 zeolite with high crystal purity and high conversion efficiency when using the modified method; it had a high CEC value of 221 meq/100 g.
Keywords:alkali fusion;alkali hydrothermal;coal fly ash;cation exchange capacity
  1. Holler H, Wirsching U, Fortschr. Miner., 63, 21 (1985)
  2. Henmi T, Clay Sci., 6, 277 (1987)
  3. Mondragon F, Rincon F, Sierra L, Escobar J, Ramirez J, Fernandez J, Fuel, 69, 263 (1990)
  4. Querol X, Moreno N, Umana JC, Alastuey A, Hermandez E, Lopez-Soler A, Plana F, Int. J. Coal Geol., 50, 413 (2002)
  5. Shingemoto N, Shirakami S, Hirano S, Hayashi H, Nippon Kagaku Kaishi, 5, 484 (1992)
  6. Park M, Choi J, Clay Sci., 9, 219 (1995)
  7. Park M, Choi CL, Lim WT, Kim MC, Choi J, Heo NH, Microporous Mesoporous Mater., 37, 81 (2000)
  8. Hollman GG, Steenbruggen G, Janssen-Jurkovicova M, Fuel, 78(10), 1225 (1999)
  9. Shingemoto N, Hayashi H, Miyura K, J. Mater. Sci., 28, 4781 (1993)
  10. Rho JS, Park JH, Hong SS, Lee BJ, Park EH, Chung SH, J. Korean Sol. Waste. Eng. Soc., 13, 644 (1996)
  11. Oh YH, Lee JH, Lee DH, J. Korean Sol. Waste Eng. Soc., 16, 363 (1999)
  12. Kim W, Jung SH, Ahn BJ, J. Ind. Eng. Chem., 3(3), 185 (1997)
  13. Murayama N, Yamamoto H, Shibata J, Int. J. Miner. Process., 64, 1 (2002)
  14. Shin BS, Lee SO, Kook NP, Korean J. Chem. Eng., 12(3), 352 (1995)
  15. Chung SH, Kim SS, Nam YM, Kim SM, Lee BJ, J. Ind. Eng. Chem., 9(2), 181 (2003)
  16. Berkgaut V, Singer A, Appl. Clay Sci., 10, 369 (1996)