Two-step hydrothermal synthesis of nano-kaolinite from fly ash: Thermodynamics and mechanism
文献类型：期刊论文
| 作者 | Guo, Ruoyu1; Yao, Wengui1; Ma, Hongwen1; Yuan, Jiangyan2 |
| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2020-10-20 |
| 卷号 | 271页码:10 |
| 关键词 | Nano-kaolinite Fly ash Hydrothermal synthesis Thermodynamic modeling Hydroxycancrinite |
| ISSN号 | 0959-6526 |
| DOI | 10.1016/j.jclepro.2020.122567 |
| 英文摘要 | Realizing 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. |
| WOS关键词 | GIBBS FREE-ENERGY ; THEORETICAL PREDICTION ; AQUEOUS-ELECTROLYTES ; HIGH-PRESSURES ; ACTIVITY-COEFFICIENTS ; ZEOLITE-A ; COAL ; TEMPERATURES ; ALUMINA ; BEHAVIOR |
| 资助项目 | Fundamental Research Funds for the China Central Universities[53200759303] |
| WOS研究方向 | Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000568784300004 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | 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 ; Fundamental Research Funds for the China Central Universities |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98241]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Ma, Hongwen |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地质与地球物理研究所
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