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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
Source PublicationCHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN1004-9541
Volume25Issue:10Pages:1539-1544
Abstract

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.

KeywordCrystallization Hydrothermal Calcium Silicate Nanofiber
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cjche.2017.02.012
Indexed BySCI
Language英语
WOS KeywordAlumina Fly-ash ; 200-degrees-c ; Na2o
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(51304184) ; Coal Based Key Scientific and Technological Project of Shanxi Province(MC2014-06)
WOS IDWOS:000414486700024
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23392
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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