期刊文献+

粉煤灰为原料碱熔融-超临界水热合成沸石的研究

Synthesis of zeolite from fly ash by alkali fusion-supercritical hydrothermal method
收藏 分享 导出
摘要 以粉煤灰为原料,采用碱熔融-超临界水热法合成粉煤灰沸石。考察了碱熔融预处理过程中碱的种类、焙烧温度、碱灰比对粉煤灰活化效果的影响;研究了粉煤灰沸石合成过程中晶化温度、碱液浓度、晶化时间、液固比和硅铝摩尔比等对粉煤灰沸石生成的影响,优化合成条件。结果表明:Na_2CO_3为活化剂,碱灰比为1.2∶1,850℃下焙烧3 h对粉煤灰的活化效果最好;经碱熔融预处理的粉煤灰与水混合在超临界水热条件下可合成钙霞石,且最佳晶化条件为加蒸馏水,液固比为5∶1,晶化温度为400℃,晶化时间为5 min,硅铝摩尔比为2.5∶1。 The purpose of this paper is to synthesize fly ash zeolite using alkali fusion-supercritical hydrothermal method, based on the fly ash as raw materials. The effects of the alkali species, calcination temperature, and alkali fly ash ratio on the fly ash activation effect in the alkali fusion process of fly ash were examined; The influence of synthesis conditions such as crystallization temperature, alkali concentration and crystallization time, liquid-solid ratio and silica alumina ratio on the formation of the fly ash zeolite were studied. The resuhs indicated that fly ash activated best could be obtained when Na2COaas activator,calcination time 3 h at 850℃ ,alkali fly ash ratio 1.2:1 g.g-1. Cancrinite could be synthesized by supercritical hydrothermal method after alkali fusion pretreatment of fly ash and the optimal crystallization conditions is : distilled water added and liquid to solid ratio of 5 : 1, crystallization time is 5 min at 400℃, silicon aluminum ratio of 2. 5: 1.
作者 赵宇雄 王建成 韩丽娜 常丽萍 鲍卫仁 ZHAO YU-xiong1, WANG Jian-cheng, HAN Li-na1,2 , CHANG Li-ping1, BAO Wei-ren1( 1. Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China ; 2. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
出处 《现代化工》 CAS CSCD 北大核心 2016年第11期141-145,共5页 Modern Chemical Industry
基金 国家自然科学基金(21476154) 山西省自然科学基金(2014011003-3)
关键词 粉煤灰 碱熔融 超临界水热合成 沸石 fly ash alkali fusion supercritical hydrothermal synthesis zeolite
作者简介 赵宇雄(1991-),男,硕士研究生,主要从事环境材料制备及应用方面的研究,995356479@qq.com; 王建成(1978-),男,博士,教授,主要从事环境催化材料的制备及应用,通讯联系人,wangjiancheng@tyut.edu.cn
  • 相关文献

参考文献11

二级参考文献111

共引文献42

投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈