Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na2O-CaO-SiO2-H2O
Zhu, Ganyu1; Li, Huiquan1,2; Li, Shaopeng1; Hou, Xinjuan1,2; Wang, Xingrui1
2017-10-01
发表期刊CHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN1004-9541
卷号25期号:10页码:1539-1544
摘要

In Na2O-CaO-SiO2-H2O system, systematic investigations of phase and morphology of calcium silicate in hydrothermal conditions were concisely conducted for high-value utilization of silicon resource in high-alumina fly ash (HAFA). The results show that crystal composition and phase may be affected by relatively low concentration of NaOH, and sodium ions are rearranged into the structure to form NaCaHSiO4 and Na2Ca3H8Si2O12 with different C/S ratio at high concentration of NaOH. In addition, phases in wollastonite group possess the morphology of nanofiber. Formation of nanofiber is attributed to the difference of surface energies between axial and radial direction, and higher temperatures lead to easier growth along radial direction. The preparation of C-S-H with different phases and morphologies can guide for the application of silicate solution with high alkalinity with different purposes. (C) 2017 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.

关键词Crystallization Hydrothermal Calcium Silicate Nanofiber
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.cjche.2017.02.012
收录类别SCI
语种英语
关键词[WOS]Alumina Fly-ash ; 200-degrees-c ; Na2o
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(51304184) ; Coal Based Key Scientific and Technological Project of Shanxi Province(MC2014-06)
WOS记录号WOS:000414486700024
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/23392
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China
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Zhu, Ganyu,Li, Huiquan,Li, Shaopeng,et al. Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na2O-CaO-SiO2-H2O[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2017,25(10):1539-1544.
APA Zhu, Ganyu,Li, Huiquan,Li, Shaopeng,Hou, Xinjuan,&Wang, Xingrui.(2017).Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na2O-CaO-SiO2-H2O.CHINESE JOURNAL OF CHEMICAL ENGINEERING,25(10),1539-1544.
MLA Zhu, Ganyu,et al."Crystallization of calcium silicate at elevated temperatures in highly alkaline system of Na2O-CaO-SiO2-H2O".CHINESE JOURNAL OF CHEMICAL ENGINEERING 25.10(2017):1539-1544.
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