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Two-step hydrothermal synthesis of nano-kaolinite from fly ash: Thermodynamics and mechanism
Guo, Ruoyu1; Yao, Wengui1; Ma, Hongwen1; Yuan, Jiangyan2
2020-10-20
Source PublicationJOURNAL OF CLEANER PRODUCTION
ISSN0959-6526
Volume271Pages:10
AbstractRealizing the comprehensive utilization of fly ash is beneficial to reduce the environmental hazard. Herein, we propose a new route for synthesizing nano-scale kaolinite by a two-step hydrothermal method using fly ash as raw material. Above all, the feasibility of each step was determined by calculating the Gibbs free energy of the reaction. In 3 mol/kg sodium hydroxide solution at 240 degrees C, the glass sphere, quartz, and mullite in fly ash raw materials decomposed wholly and transformed to sodalite first and then hydroxycancrinite eventually. The intermediate product, hydroxycancrinite, dissolved in the HNO3 solution quickly and precipitated to boehmite as a precursor, which combined with Si4+ from the solution and transformed to flaky kaolinite with a diameter of around 200 nm ultimately. This method has a potential in industrial-scale manufacturing of nano-size kaolinite and provides a new route for the green recycling of fly ash. (C) 2020 Elsevier Ltd. All rights reserved.
KeywordNano-kaolinite Fly ash Hydrothermal synthesis Thermodynamic modeling Hydroxycancrinite
DOI10.1016/j.jclepro.2020.122567
Funding OrganizationFundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities
WOS KeywordGIBBS FREE-ENERGY ; THEORETICAL PREDICTION ; AQUEOUS-ELECTROLYTES ; HIGH-PRESSURES ; ACTIVITY-COEFFICIENTS ; ZEOLITE-A ; COAL ; TEMPERATURES ; ALUMINA ; BEHAVIOR
Language英语
Funding ProjectFundamental Research Funds for the China Central Universities[53200759303]
Funding OrganizationFundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities ; Fundamental Research Funds for the China Central Universities
WOS Research AreaScience & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
WOS SubjectGreen & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
WOS IDWOS:000568784300004
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/98241
Collection岩石圈演化国家重点实验室
Corresponding AuthorMa, Hongwen
Affiliation1.China Univ Geosci, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmet Minerals & So, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, POB 9825, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Guo, Ruoyu,Yao, Wengui,Ma, Hongwen,et al. Two-step hydrothermal synthesis of nano-kaolinite from fly ash: Thermodynamics and mechanism[J]. JOURNAL OF CLEANER PRODUCTION,2020,271:10.
APA Guo, Ruoyu,Yao, Wengui,Ma, Hongwen,&Yuan, Jiangyan.(2020).Two-step hydrothermal synthesis of nano-kaolinite from fly ash: Thermodynamics and mechanism.JOURNAL OF CLEANER PRODUCTION,271,10.
MLA Guo, Ruoyu,et al."Two-step hydrothermal synthesis of nano-kaolinite from fly ash: Thermodynamics and mechanism".JOURNAL OF CLEANER PRODUCTION 271(2020):10.
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