Nucleation kinetics of MgCl2-ethanol adduct for the supported Ziegler-Natta catalysts with a thermodynamic approach | |
Ansari, Ziaul Haque1,2; Zeng, Yan3; Demopoulos, George P.3; Li, Zhibao1 | |
刊名 | JOURNAL OF CRYSTAL GROWTH |
2018-07-15 | |
卷号 | 494页码:44-52 |
关键词 | Mgcl2-ethanol Adduct Z-n Catalyst Metastable Zone Width Induction Time |
ISSN号 | 0022-0248 |
DOI | 10.1016/j.jcrysgro.2018.05.007 |
英文摘要 | MgCl2-ethanol adducts play a key role in the synthesis of supported Ziegler-Natta catalysts. The morphology of the MgCl2-ethanol adducts, which is controlled by their crystallization process, can determine the structure and thus the property of the polyolefin products. Here we study the nucleation kinetics of MgCl2-ethanol adducts by measuring the metastable zone width (MSZW) and induction time at different temperatures. Supersaturation ratios used in induction time measurements were predicted by the Mixed Solvent Electrolyte (MSE) model embedded in OLI System. Nyvlt's approach was applied to determine MSZW. By the induction time measurement, the effect of temperature, and supersaturation were studied. It was found that induction time decreases as either temperature or supersaturation increases. The measured MSZW and induction time are used to estimate the nucleation kinetics of the system, and thereby distinguishing between the homogeneous and heterogeneous mechanisms. The interfacial tension and other related nucleation parameters were calculated from the induction time data. XRD and TGA indicate that the MgCl2-ethanol adduct has the stoichiometry of MgCl2 center dot 6C(2)H(5)OH. |
资助项目 | National Natural Science Foundation of China[21476235] ; National Natural Science Foundation of China[21776279] |
WOS关键词 | Solvent Electrolyte Systems ; Partial Molal Properties ; Metastable Zone ; High-pressures ; Recrystallization Method ; Transport-properties ; Magnesium-chloride ; Polymerization ; Ethanol ; Mgcl2 |
WOS研究方向 | Crystallography ; Materials Science ; Physics |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000432749700006 |
资助机构 | National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/24746] |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Li, Zhibao |
作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.McGill Univ, Mat Engn, 3610 Univ St, Montreal, PQ H3A 0C5, Canada |
推荐引用方式 GB/T 7714 | Ansari, Ziaul Haque,Zeng, Yan,Demopoulos, George P.,et al. Nucleation kinetics of MgCl2-ethanol adduct for the supported Ziegler-Natta catalysts with a thermodynamic approach[J]. JOURNAL OF CRYSTAL GROWTH,2018,494:44-52. |
APA | Ansari, Ziaul Haque,Zeng, Yan,Demopoulos, George P.,&Li, Zhibao.(2018).Nucleation kinetics of MgCl2-ethanol adduct for the supported Ziegler-Natta catalysts with a thermodynamic approach.JOURNAL OF CRYSTAL GROWTH,494,44-52. |
MLA | Ansari, Ziaul Haque,et al."Nucleation kinetics of MgCl2-ethanol adduct for the supported Ziegler-Natta catalysts with a thermodynamic approach".JOURNAL OF CRYSTAL GROWTH 494(2018):44-52. |
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