类固相法快速合成小颗粒方沸石的研究Rapid synthesis of small-sized analcite by like-solid phase method
张恕,赵斌,杨凯,郭宏飞,胡忠宽,刘秀伍,谭朝阳,曹吉林
摘要(Abstract)：
为解决传统水热法合成方沸石工艺存在晶化时间长、体系水含量大等弊端,采用类固相法以硅铝干凝胶为硅源和铝源、氢氧化钠为碱源,进行了快速合成小颗粒方沸石的研究,并通过X射线衍射(XRD)、扫描电镜(SEM)、红外光谱分析(FRIR)、激光粒度分析等手段对合成产品进行了表征分析。结果表明,当晶化时间t=8 h,晶化温度T=150℃,硅铝干凝胶的摩尔组成n(SiO_2)/n(Al_2O_3)=5,晶化体系物料摩尔组成n(Na_2O)/n(SiO_2)=0.26,n(H_2O)/n(SiO_2)=11.10时,可合成出形貌均一、结晶良好的小颗粒方沸石,其粒径大小主要集中在0.1～20mm。与传统水热法相比,该方法极大地减少了合成过程的用水量,缩短了晶化时间,缩小了产品粒度,从整体上优化了方沸石的合成工艺。
关键词(KeyWords)： 类固相法;低水硅比;小颗粒;方沸石
基金项目(Foundation): 河北省自然科学基金(B2018202330);; 河北省高等学校科学技术研究项目(ZD2019042)
作者(Author): 张恕,赵斌,杨凯,郭宏飞,胡忠宽,刘秀伍,谭朝阳,曹吉林
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