Controlled Supersaturation Precipitation of Hydromagnesite for the MgCl2-Na2CO3 System at Elevated Temperatures: Chemical Modeling and Experiment
文献类型：期刊论文
| 作者 | Cheng, Wenting; Li, Zhibao |
| 刊名 | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
 |
| 出版日期 | 2010-02-17 |
| 卷号 | 49期号:4页码:1964-1974 |
| 关键词 | BASIC MAGNESIUM CARBONATE AQUEOUS-SOLUTIONS THERMODYNAMIC PROPERTIES TRANSPORT-PROPERTIES STRONG ELECTROLYTES CARDS STRUCTURE HIGH-PRESSURES SURFACE STATE HOUSE |
| ISSN号 | 0888-5885 |
| 通讯作者 | Li, ZB |
| 英文摘要 | A new chemical model of supersaturation (S) was developed and applied to test for the precipitation of hydromagnesite [Mg-5(CO3)(4)(OH)(2)center dot 4H(2)O] in the MgCl2-Na2CO3 system in supersaturated solutions over the temperature range of 50-90 degrees C. Based on the new model with the help of the OLI platform, the contour supersaturation of Mg-5(CO3)(4)(OH)(2)center dot 4H(2)O has been exactly constructed by calculating the activity coefficients of species in unstable solutions. Mg-5(CO3)(4)(OH)(2)center dot 4H(2)O crystals were identified using X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM) images. It was found that the crystal properties, such as morphology, particle size distribution, filtration, and sedimentation characteristics, can be optimized by controlling the supersaturation during precipitation. With the control of supersaturation, well-developed spherical-like Mg-5(CO3)(4)(OH)(2)center dot 4H(2)O crystals can grow to an average size of 30-40 mu m, indicating a narrow particle size distribution, good filtration characteristics, and a high sedimentation rate. In addition, the Mg-5(CO3)(4)(OH)(2)center dot 4H(2)O obtained was calcined to produce high-purity MgO at 800 degrees C. The size and morphology of MgO were similar to the same characteristics of the corresponding precursors. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | BASIC MAGNESIUM CARBONATE ; AQUEOUS-SOLUTIONS ; THERMODYNAMIC PROPERTIES ; TRANSPORT-PROPERTIES ; STRONG ELECTROLYTES ; CARDS STRUCTURE ; HIGH-PRESSURES ; SURFACE ; STATE ; HOUSE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000274342500062 |
| 公开日期 | 2013-11-27 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6210]  |
| 专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
| 作者单位 | Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cheng, Wenting,Li, Zhibao. Controlled Supersaturation Precipitation of Hydromagnesite for the MgCl2-Na2CO3 System at Elevated Temperatures: Chemical Modeling and Experiment[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2010,49(4):1964-1974. |
| APA | Cheng, Wenting,&Li, Zhibao.(2010).Controlled Supersaturation Precipitation of Hydromagnesite for the MgCl2-Na2CO3 System at Elevated Temperatures: Chemical Modeling and Experiment.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,49(4),1964-1974. |
| MLA | Cheng, Wenting,et al."Controlled Supersaturation Precipitation of Hydromagnesite for the MgCl2-Na2CO3 System at Elevated Temperatures: Chemical Modeling and Experiment".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 49.4(2010):1964-1974. |
入库方式： OAI收割
来源：过程工程研究所
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