混碱改性粉煤灰制备NaP1型沸石

Synthesis of Zeolite NaP1 from Coal Fly Ash Modified by Mixed Alkali

本文通过对粉煤灰进行酸处理与不同浓度的NaOH和KOH混碱改性,采用水热晶化法合成了单一的NaP1型沸石。利用X射线衍射(XRD)、扫描电子显微镜(SEM)和X射线荧光光谱仪(XRF)进行测试表征,结果表明:在硅铝比和晶化时间一定的情况下,单一NaP1型沸石的合成主要取决于混碱浓度和晶化温度;在硅铝摩尔比为1.5,晶化时间为8 h的条件下,制备单一NaP1型沸石的最佳混碱浓度和晶化温度分别是10 mol/L、120℃。

In this paper,the raw materials modified by acid solution and mixed alkali solution（NaOH and KOH） with different concentrations were selected for synthesis of single-phase zeolite NaP1.The experimental products were characterized by means of X-ray diffraction（XRD）,scanning electron microscope（SEM）,and X-ray fluorescence（XRF）.The results indicated that the concentration of mixed alkali solution and crystallization temperature are the main determinants for synthesis of single-phase zeolite NaP1 with fixed crystallization time and ratio of Si and Al.With Si/Al of 1.5,crystallization time of 8 h,crystallization temperature of 120 ℃ and mixed alkali solution of 10 mol/L,single-phase zeolite NaP1 was well prepared.