粉煤灰分子筛的制备与性能研究

本实验采用碱熔融水热法，以预处理过的粉煤灰为主要原料，以固体NaOH为助溶剂制备性能稳定的沸石分子筛．研究了NaOH与粉煤灰比、煅烧温度、晶化时间、晶化温度等实验因素对合成沸石结构和性能的影响，利用x射线衍射（XRD）、扫描电镜（SEM）、比表面积（BET）、分光光度计，分别对晶型、表面形貌和吸光度进行了表征．实验结果表明：当NaOH与粉煤灰比为1．3、煅烧温度为600℃、晶化时间为10h、晶化温度为100℃条件下合成的沸石分子筛是Na—A型，BET测定其比表面积是97．053m2，g，2h内亚甲基蓝的去除率可达97％，具有良好的吸附性能．

Study on the Preparation and Properties of Fly Ash Zeolite

In this experiment, the stabilized zeolite molecular sieve was prepared by alkali fusion hydrothermal method, with pretreated fly ash as main raw materials, solid NaOH as cosolvent. The effect of NaOH fly ash ratio, calcination temperature, crystallization time, crystallization temperature and other experimental factors on the structure and properties of the synthetic zeolite was researched. And the crystal type, surface morphology as well as absorbance were characterized by X-ray diffrac- tion （XRD）, scanning electron microscopy （SEM）, specific surface area （BET） and spectrophotometer, respectively. The re- suits showed that the synthesized zeolite molecular sieve was Na-A zeolite type when the NaOH fly ash ratio was 1 ,3, the calcination temperature was 600 ℃, and the crystallization time was 10 h, crystallization temperature was 100 ℃. Moreover, the specific surface area measured by BET was 97.053 m2/g and in 2 hours the removal rate of methylene blue was 97%, which showed good adsorption performance.