Zeolitification Characteristics of Coal Fly Ash by Amount of Na2CO3 Using the Fusion/Hydrothermal Method

용융/수열합성법으로부터 Na2CO3 첨가량에 따른 석탄비산재의 제올라이트화 특성

  • Lee, Chang-Han (Department of Environmental Adminstration, Catholic University of Pusan)
  • 이창한 (부산가톨릭대학교 환경행정학과)
  • Received : 2019.04.24
  • Accepted : 2019.06.25
  • Published : 2019.06.30


In this study, zeolitic materials at $Na_2CO_3/CFA$ ratio of 0.6 - 1.8 were synthesized from coal fly ash from a thermal power plant using a fusion/hydrothermal method. The zeolitic materials were found to have cubic crystals structure and X-ray diffraction (XRD) peaks of Na-A zeolite by XRD and SEM analysis. When the zeolitic materials were synthesized from the coal fly ash, the XRD peaks of the zeolitic materials at $Na_2CO_3/CFA$ ratios of 0.9-1.8 had the same location as the XRD peaks of commercial Na-A zeolite. The XRD peaks of the Na-A zeolite ($Na_{12}Al_{12}Si_{12}O_{48}27.4H_2O$) were confirmed in the $2{\theta}$ in the range of 7.18-34.18. However, it was also confirmed that peaks of $CaCO_3$, an impurity inhibiting synthesis of Na-A zeolite from CaO and $Na_2CO_3$ in the coal fly ash, occurred in the XRD peaks of the zeolitic materials at $Na_2CO_3/CFA$ ratio of 1.5-1.8. The crystallinities of the zeolitic materials tended to increase gradually within the $Na_2CO_3/CFA$ ratio range of 0.6-1.8.


Supported by : 부산가톨릭대학교, 한국연구재단


  1. Carlos, A. R., Williams, C. D., Clive, L. R., 2009, A Comparative study of two methods for the synthesis of fly ash-based sodium and potassium type zeolites, Fuel, 88, 1403-1416.
  2. El-Naggar, M. R., El-Kamash, A. M., El-Dessouky, M. I., Ghonaim, A. K., 2008, Two-step method for preparation of NaA-X zeolite blend from fly ash for removal of cesium ions, J. Hazard. Mater., 154, 963-972.
  3. Franus, W., Wdowin, M., Franus, M., 2014, Synthesis and characterization of zeolites prepared from industrial fly ash, Environ. Monit. Assess., 186, 1-9.
  4. Inada, M., Eguchi, Y., Enomoto, N., Hojo, J., 2005, Synthesis of zeolite from coal fly ashes with different silica - alumina composition, Fuel, 84, 299-304.
  5. Kazemian, H., Naghdali, Z., Ghaffari Kashani, T., Farhadi, F., 2010, Conversion of high silicon fly ash to Na-P1 zeolite: alkaline fusion followed by hydrothermal crystallization, Adv. Powder Technol., 21, 279-283.
  6. Lee, C. H., Park, J. M., Lee, M. G., 2014, Adsorption charateristics of Sr(II) and Cs(I) ions by zeolite synthesized from coal fly ash, J. Environ. Sci. Int., 23, 1987-1998.
  7. Lee, C. H., Park, J. W., 2011, Synthesis of zeolite using discharged fly ash in an industrial complex in Ulsan, KSEE, 33, 301-316.
  8. Li, L., Wang, S., Zhu, Z., 2006, Geopolymeric adsorbents from fly ash for dye removal from aqueous solution, J. Col. Int. Sci., 300, 52-59.
  9. Machado, N. R. C. F., Miotto, D. M. M., 2005, Synthesis of Na-A and -X zeolites from oil shale ash, Fuel, 84, 2289-2294.
  10. Maeng, J. H., Kim, T. Y., Cho, H. N., Kim, E. Y., 2015, Minimizing Environmental Impact of Ash Treatment in Thermal Power Plants (II), Korea Environment Institute, Project report, 1-18.
  11. Murayama, N., Yamamoto, H., Shibata, J., 2002, Mechanism of zeolite synthesis from coal fly ash by alkali hydrothermal reaction, Int. J. Miner. Process, 64, 1-17.
  12. Tanaka, H., Sakai, Y., Hino, R., 2002, Formation of Na-A and -X zeolites from waste solutions in conversion of coal fly ash to zeolites, Mater. Res. Bull., 37, 1873-1884.
  13. Treacy, M. M. J., Higgins, J. B., 2001, Collection of Simulated XRD Powder Patterns for Zeolites, Elsevier, Amsterdam.
  14. Walek, T. T., Saito, F., Zhang, Q., 2008, The effect of low solid/liquid ratio on hydrothermal synthesis of zeolites from fly ash, Fuel, 87, 3194-3199.
  15. Wang, C. F., Li, J. S., Wang, L. J., Sun, X. Y., 2008, Influence of NaOH concentrations on synthesis of pure-form zeolite A from fly ash using two-stage method, J. Hazard. Mater., 155, 58-64.
  16. Ye, Y., Zeng, X., Qian, W., Wang, M., 2008, Synthesis of pure zeolites from supersaturated silicon and aluminum alkali extacts from fused coal fly ash, Fuel, 87, 1880-1886.
  17. Zyrkowski, M., Neto, R. C., Santos, L. F., Witkowski, K., 2016, Characterization of fly-ash cenospheres from coal-fired power plant unit, Fuel, 174, 49-53.