摘要
多孔Na-X分子筛比表面积大,离子交换能力强,常被应用于废水处理、气体吸附分离等领域,通常由硅、铝无机盐原料合成得到。粉煤灰、煤矸石、高岭土、油页岩、稻壳灰、甘蔗渣等矿物及废渣含有高含量的硅、铝元素,经过预处理可用于合成Na-X分子筛。本文综述了多种天然矿物和工业固体废料的组成及合成Na-X分子筛的最新研究进展,讨论了不同矿物和固体废料合成Na-X的活化工艺、晶化动力学及机理,重点分析了合成条件对矿物和固体废料合成Na-X的影响,包括硅铝比、晶化温度、晶化时间、阴阳离子、水硅比、碱灰比、超声条件和有机添加剂的影响。
Porous zeolite Na-X with larger specific surface area and more ion-exchange capacity is usually applied in wastewater treatment,adsorption and separation of gases,and so on.It is traditionally prepared from the Si and Al-containing inorganic salts.Many minerals and solid waste residues such as coal fly ash,coal gangue,kaolin,oil shale,rice husk ash and bagasse which contain high concentration of Si and Al element can be used for the zeolite Na-X synthesis after pretreatment.The compositions of minerals and solid wastes,as well as the research progress of the synthesis of zeolite Na-X were reviewed,and the pretreatment processes,crystallization kinetics and crystallization mechanism were discussed.Moreover,the effects of synthesis conditions including SiO;/Al;O;ratio,crystallization temperature and time,anions and cations,H;O/SiO;ratio,alkali/ash ratio,ultrasonic treatment,and organic additive on the synthesis of zeolite Na-X from minerals and solid wastes were analyzed.
作者
杨宁伟
安良成
吕俊敏
刘素丽
王正
庹杰
高新华
范素兵
YANG Ningwei;AN Liangcheng;LYU Junmin;LIU Suli;WANG Zheng;TUO Jie;GAO Xinhua;FAN Subing(State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China;Ningxia Coal Industry Group Co.,Ltd.,State Energy Resources Investment Corporation,Yinchuan 750411,China)
出处
《硅酸盐通报》
CAS
北大核心
2022年第2期401-414,共14页
Bulletin of the Chinese Ceramic Society
基金
宁夏重点研发计划(2018BEE03011,2018BDE02057,2017BY063)
国家重点研发计划(2019YFC1904303)
宁夏自然科学基金(2020AAC03012)
化学工程与技术“双一流”学科。
关键词
固废利用
分子筛合成
天然矿物
粉煤灰
Na-X分子筛
晶化动力学
晶化机理
合成条件
utilization of solid waste
synthesis of zeolite
mineral
coal fly ash
zeolite Na-X
crystallization kinetics
crystallization mechanism
synthesis condition
