煤气化渣制备单一相Y分子筛研究  

Preparation of Single Phase Y Zeolite from Coal Gasification Slag

作　　者：吕俊敏 王正 杨颖臻 赵潇霞 范素兵[1] LYU Junmin;WANG Zheng;YANG Yingzhen;ZHAO Xiaoxia;FAN Subing(State Key Laboratory of High-Efficiency Utilizing of Coal&Green Chemical Engineering,College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏大学化学化工学院,省部共建煤炭高效利用与绿色化工国家重点实验室,银川750021

出　　处：《硅酸盐通报》2024年第7期2514-2521,2538,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家重点研发计划(2019YFC1904303);宁夏重点研发计划(2018BEE03011);宁夏科技创新领军人才培养计划项目(2021GKLRLX15)。

摘　　要：煤气化渣是煤化工固体废弃物,含有大量的硅元素和铝元素,可以作为原料合成高附加值的Y分子筛材料,实现资源利用。以宁夏宁东煤气化渣为原料,采用酸碱预处理和导向剂诱导水热合成法,通过优化工艺条件,成功获得了具有八面体形貌、单一相的Y分子筛。详细考察了酸碱预处理条件、硅铝比、水硅比、晶化温度、晶化时间、导向剂含量等因素对合成样品晶相的影响,并采用XRD、XRF、SEM、FT-IR等技术对煤气化渣合成Y分子筛样品的性质进行了分析。通过优化工艺条件,水硅比降低到了20,晶化时间缩短到了24 h,合成的Y分子筛产品具有较好的结晶度和高的比表面积,比表面积达到538 m^(2)/g,总孔体积达到0.350 cm^(3)/g。Coal gasification slag is a solid waste of coal chemical industry.Because it contains a lot of silicon and aluminum elements,it can be used as raw material to synthesize high value Y zeolite material,which realizes resource utilization.Y zeolite with octahedral morphology and single phase was successfully synthesized from Ningxia Ningdong coal gasification slag by hydrothermal synthesis method induced by directing agent after acid and alkali pretreatment.The effects of acid and alkali pretreatment conditions,Si/Al ratio,H_(2)O/SiO 2 ratio,crystallization temperature,crystallization time and directing agent content on the crystal phase of Y zeolite synthesized from coal gasification slag were investigated in detail.XRD,XRF,SEM and FT-IR were used to analyze the properties of synthesized Y zeolite.By optimizing the process conditions,the H_(2)O/SiO 2 ratio is reduced to 20,the crystallization time is shortened to 24 h,and the Y zeolite product has good crystallinity,high specific surface area of 538 m^(2)/g and total pore volume of 0.350 cm^(3)/g.

关 键 词：煤气化渣 资源利用 单一相 Y分子筛 工艺优化 

分 类 号：O782[理学—晶体学]