Single sites in heterogeneous catalysts: separating myth from reality

MD Korzyński, C Copéret - Trends in Chemistry, 2021 - cell.com
Heterogeneous catalytic processes are a staple of the sustainable chemical industry. One of
the holy grails of contemporary catalysis science is the formation of the so-called single-site …

Surface effect of the MgCl2 support in Ziegler–Natta catalyst for ethylene polymerization: A computational study

K Xie, S Xu, W Hao, J Wang, A Huang, Y Zhang - Applied Surface Science, 2022 - Elsevier
Abstract Ziegler–Natta (Z–N) catalyst is a remarkable catalyst for olefin polymerization in the
petrochemical industry. However, the role of each component remains unclear because of …

MAO-and Borate-Free Activating Supports for Group 4 Metallocene and Post-Metallocene Catalysts of α-Olefin Polymerization and Oligomerization

IE Nifant'ev, PD Komarov, OD Kostomarova… - Polymers, 2023 - mdpi.com
Modern industry of advanced polyolefins extensively uses Group 4 metallocene and post-
metallocene catalysts. High-throughput polyolefin technologies demand the use of …

Electronic properties of Ti sites in Ziegler–Natta catalysts

A Piovano, M Signorile, L Braglia, P Torelli… - ACS …, 2021 - ACS Publications
Although Ziegler–Natta (ZN) catalysts play a major role in the polyolefin market, a true
understanding of their properties at the molecular level is still missing. In particular, there is a …

[HTML][HTML] Resolution of chemical shift anisotropy in 19F ENDOR spectroscopy at 263 GHz/9.4 T

A Kehl, M Hiller, F Hecker, I Tkach, S Dechert… - Journal of Magnetic …, 2021 - Elsevier
Pulsed 19 F ENDOR spectroscopy provides a selective method for measuring angstrom to
nanometer distances in structural biology. Here, the performance of 19 F ENDOR at fields of …

In-situ operando and ex-situ study on light hydrocarbon-like-diesel and catalyst deactivation kinetic and mechanism study during deoxygenation of sludge oil

G Abdulkareem-Alsultan, N Asikin-Mijan… - Chemical Engineering …, 2022 - Elsevier
Deoxygenation is a highly significant means of generating oxygen-free hydrocarbon fuels
from liquid biomass. This study will deoxygenate sludge palm oil (FFA%= 42.35%) in an H 2 …

Spectroscopic signature and structure of the active sites in Ziegler–Natta polymerization catalysts revealed by electron paramagnetic resonance

A Ashuiev, M Humbert, S Norsic, J Blahut… - Journal of the …, 2021 - ACS Publications
Despite decades of extensive studies, the atomic-scale structure of the active sites in
heterogeneous Ziegler–Natta (ZN) catalysts, one of the most important processes of the …

Active Sites in Cr (III)‐Based Ethylene Polymerization Catalysts from Machine‐Learning‐Supported XAS and EPR Spectroscopy

A Ashuiev, A Giorgia Nobile, D Trummer… - Angewandte …, 2024 - Wiley Online Library
The ethylene polymerization Phillips catalyst has been employed for decades and is central
to the polymer industry. While Cr (III) alkyl species are proposed to be the propagating sites …

Synthesis, structure and functions of discrete titanium-based multinuclear architectures

M Scarpi-Luttenauer, P Mobian, L Barloy - Coordination Chemistry Reviews, 2022 - Elsevier
An overview of organometallic or coordination multinuclear titanium complexes published so
far is given herein. The majority of these compounds are supramolecular homonuclear …

Orbital-scale understanding of the surface effect of the MgCl2 in the Ziegler–Natta catalyst for ethylene polymerization: A computational study

K Xie, A Huang, P Zhang, X Wang, Y Zhang… - Chemical Engineering …, 2024 - Elsevier
Ziegler-Natta catalyst is a widely used olefin polymerization catalyst in petrochemical
industries. However, the role of each catalyst component is not clear due to the complexity of …