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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

Abstract

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.

Acknowledgement

Supported by : 부산가톨릭대학교, 한국연구재단

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