Crystallization and Agglomeration Kinetics of Hydromagnesite in the Reactive System MgCl2-Na2CO3-NaOH-H2O
文献类型：期刊论文
| 作者 | Wang, Junfeng; Li, Zhibao |
| 刊名 | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
 |
| 出版日期 | 2012-06-13 |
| 卷号 | 51期号:23页码:7874-7883 |
| 关键词 | chemical-equilibrium model natural-waters na-k-mg-ca-h-cl-so4-oh-hco3-co3-co2-h2o system mineral solubilities temperatures nucleation prediction |
| ISSN号 | 0888-5885 |
| 其他题名 | Ind. Eng. Chem. Res. |
| 中文摘要 | The reactive crystallization kinetics of hydromagnesite (4MgCO(3)center dot Mg(OH)(2)center dot 4H(2)O) for the MgCl2-Na2CO3-NaOH-H2O system has been systematically investigated in a continuously operated mixed-suspension mixed-product removal (MSMPR) crystallizer for the first time. Determination of the effects of reactive temperature and OH- ion on magnesium carbonate hydrates in the above system was conducted through a batch crystallization experiment, and the crystallization temperature of 80 degrees C for the precipitation of regular spherical-like hydromagnesite was selected for the kinetics study. The relative supersaturation for hydromagnesite is obtained based on the activity coefficients calculated by the Pitzer model. The growth rate, nucleation rate, and agglomeration kernel are determined on the basis of the agglomeration population balance equation, and their kinetic equations are then correlated in terms of power law kinetic expressions. The orders of volume growth rate and linear growth rate with respect to the relative supersaturation are 1.55 and 0.95, respectively. The magma density has an important effect on the nucleation rate of hydromagnesite particles. However, the expression of beta alpha M-T(-0.39) for hydromagnesite agglomeration shows that the magma density has a negative effect on the agglomeration kernel. All of these will provide a basis for the design and analysis of industrial crystallizers. |
| 英文摘要 | The reactive crystallization kinetics of hydromagnesite (4MgCO(3)center dot Mg(OH)(2)center dot 4H(2)O) for the MgCl2-Na2CO3-NaOH-H2O system has been systematically investigated in a continuously operated mixed-suspension mixed-product removal (MSMPR) crystallizer for the first time. Determination of the effects of reactive temperature and OH- ion on magnesium carbonate hydrates in the above system was conducted through a batch crystallization experiment, and the crystallization temperature of 80 degrees C for the precipitation of regular spherical-like hydromagnesite was selected for the kinetics study. The relative supersaturation for hydromagnesite is obtained based on the activity coefficients calculated by the Pitzer model. The growth rate, nucleation rate, and agglomeration kernel are determined on the basis of the agglomeration population balance equation, and their kinetic equations are then correlated in terms of power law kinetic expressions. The orders of volume growth rate and linear growth rate with respect to the relative supersaturation are 1.55 and 0.95, respectively. The magma density has an important effect on the nucleation rate of hydromagnesite particles. However, the expression of beta alpha M-T(-0.39) for hydromagnesite agglomeration shows that the magma density has a negative effect on the agglomeration kernel. All of these will provide a basis for the design and analysis of industrial crystallizers. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | CHEMICAL-EQUILIBRIUM MODEL ; NATURAL-WATERS ; NA-K-MG-CA-H-CL-SO4-OH-HCO3-CO3-CO2-H2O SYSTEM ; MINERAL SOLUBILITIES ; TEMPERATURES ; NUCLEATION ; PREDICTION |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000305111700005 |
| 公开日期 | 2013-11-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6293]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Junfeng,Li, Zhibao. Crystallization and Agglomeration Kinetics of Hydromagnesite in the Reactive System MgCl2-Na2CO3-NaOH-H2O[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2012,51(23):7874-7883. |
| APA | Wang, Junfeng,&Li, Zhibao.(2012).Crystallization and Agglomeration Kinetics of Hydromagnesite in the Reactive System MgCl2-Na2CO3-NaOH-H2O.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,51(23),7874-7883. |
| MLA | Wang, Junfeng,et al."Crystallization and Agglomeration Kinetics of Hydromagnesite in the Reactive System MgCl2-Na2CO3-NaOH-H2O".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 51.23(2012):7874-7883. |
入库方式： OAI收割
来源：过程工程研究所
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