Structure Determination of the δ-MgCl2 Support in Ziegler-Natta Catalysts

被引：4

作者：

Wada, Toru ^{[1
,2
]}

Takasao, Gentoku ^{[1
]}

Terano, Minoru ^{[1
,2
]}

Chamniingkwan, Patchanee ^{[1
,2
]}

Taniike, Toshiaki ^{[1
,2
]}

机构：

[1] Japan Adv Inst Sci & Technol, Grad Sch Adv Sci & Technol, 1-1 Asahidai, Nomi, Ishikawa 9231292, Japan

[2] Dutch Polymer Inst, POB 902, NL-5600 AX Eindhoven, Netherlands

来源：

JOURNAL OF THE JAPAN PETROLEUM INSTITUTE | 2022年 / 65卷 / 03期

关键词：

Ziegler-Natta catalyst; Structural disorder; Nanocrystal; Synchrotron; Total scattering; Pair distribution function; SCATTERING; DISORDER; NANOPARTICLES; PERFORMANCE; CRYSTAL;

D O I：

10.1627/jpi.65.88

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

delta-MgCl2 support is an essential component of highly active Ziegler-Natta catalysts. The microstructure of delta-MgCl2 in modern industrial catalysts is extremely disordered, so is hard to determine using only powder X-ray diffraction (PXRD). Several structural models have been proposed, such as nano-sized platelet crystallites and one-dimensional chain-like structures. We used atomic pair distribution function (PDF) based on total X-ray scattering and simulations with nanoparticle models in addition to PXRD to investigate the detailed structure of delta-MgCl2. We found that delta-MgCl2 in modern catalysts consists of nano-sized platelet crystallites with stacking disorder, regardless of the preparation protocol. Here, we review our recent findings of the structure determination of delta-MgCl2.

引用

页码：88 / 96

页数：9

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