Ethylene Polymerization over Supported Vanadium-Magnesium Catalysts with Different Vanadium Content: The Effect of Hydrogen on Molecular Weight Characteristics of the Produced Bimodal Polyethylene | Sciact - CRIS-система Института катализа

Ethylene Polymerization over Supported Vanadium-Magnesium Catalysts with Different Vanadium Content: The Effect of Hydrogen on Molecular Weight Characteristics of the Produced Bimodal Polyethylene Научная публикация

Журнал

Catalysts
ISSN: 2073-4344

Вых. Данные

Год: 2022, Том: 12, Номер: 9, Номер статьи : 985, Страниц : 10 DOI: 10.3390/catal12090985

Ключевые слова

catalytic reaction kinetics; heterogeneous catalysis; experimental methods; theoretical methods

Авторы

Mikenas Tatiana ¹ , Zhao Zenghui ² , Guan Peng ³ , Matsko Mikhail ¹ , Zakharov Vladimir ¹ , Wu Wei ⁴

Организации

1	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
2	China National Petroleum Corporation, Daqing Chemical Research Institute, Daqing 163714, China
3	Faculty of Natural Sciences, Novosibirsk National Research University, 630090 Novosibirsk, Russia
4	School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China

Информация о финансировании (2)

1	Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)	0239-2021-0004
2	PetroChina Petrochemical Research Institute

Data are presented on the activity of supported vanadium-magnesiumcatalysts (VMCs)with different vanadium content in ethylene polymerization and the molecular weight characteristics of the produced polyethylene. The VC1 catalyst, with a very low vanadium content (0.12 wt.%), showed a sixfold higher activity per unit weight of vanadium than the VC2 catalyst with a high-vanadium content (4.0 wt.%). Additionally, the total activity of VC2 (kg PE/g cath) was fivefold higher when compared to VC1. The introduction of hydrogen in polymerization leads to a considerable decrease in the activity of both catalysts. The polyethylene obtained in the presence of hydrogen over both catalysts has a broad bimodal molecular weight distribution (MWD) with a distinct shoulder in the high-molecular region (Mw 106 g/mol). Decomposition of theMWD curves of bimodal polyethylene into two fractions (high- and low-molecular fractions) made it possible to determine for the first time the ratio of the reaction rate constants of chain transfer with hydrogen (KtrH) and polymer chain propagation (Kp) for two groups of the VMC active sites producing low- and high-molecular fractions of bimodal polyethylene.

Mikenas T. , Zhao Z. , Guan P. , Matsko M. , Zakharov V. , Wu W.
Ethylene Polymerization over Supported Vanadium-Magnesium Catalysts with Different Vanadium Content: The Effect of Hydrogen on Molecular Weight Characteristics of the Produced Bimodal Polyethylene
Catalysts. 2022. V.12. N9. 985 :1-10. DOI: 10.3390/catal12090985 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	25 июл. 2022 г.
Принята к публикации:	29 авг. 2022 г.
Опубликована в печати:	1 сент. 2022 г.
Опубликована online:	1 сент. 2022 г.

Web of science:	WOS:000858151800001
Scopus:	2-s2.0-85138662408
РИНЦ:	52694003
Chemical Abstracts:	2022:2500747
Chemical Abstracts (print):	180:225273
OpenAlex:	W4294252546

БД	Цитирований
Scopus	1
Web of science	1
РИНЦ	2
OpenAlex	1