Nickel-based solid catalysts for ethylene oligomerization – a review

2014 ◽  
Vol 4 (8) ◽  
pp. 2412-2426 ◽  
Author(s):  
Annie Finiels ◽  
François Fajula ◽  
Vasile Hulea
Keyword(s):  
Porous Materials ◽  
Catalytic Performance ◽  
Ethylene Oligomerization ◽  
Solid Catalysts ◽  
Inorganic Porous Materials

The properties of Ni-based inorganic porous materials and their catalytic performance in ethylene oligomerization are reviewed.

scholarly journals Ni-Based Complexes in Selective Ethylene Oligomerization Processes

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 498
Author(s):  
Giyjaz E. Bekmukhamedov ◽  
Aleksandr V. Sukhov ◽  
Aidar M. Kuchkaev ◽  
Dmitry G. Yakhvarov
Keyword(s):  
High Density Polyethylene ◽  
Petrochemical Industry ◽  
Nickel Catalysts ◽  
Catalytic Performance ◽  
Ethylene Oligomerization ◽  
Linear Low Density Polyethylene ◽  
Main Method ◽  
The World ◽  
World Demand ◽  
Alpha Olefins

Linear alpha-olefins are widely used in the petrochemical industry and the world demand for these compounds increases annually. At present, the main method for producing linear alpha-olefins is the homogeneous catalytic ethylene oligomerization. This review presents modern nickel catalysts for this process, mainly systems for obtaining of one of the most demanded oligomer—1-butene—which is used for the production of linear low density polyethylene (LLDPE) and high density polyethylene (HDPE). The dependence of the catalytic performance on the composition and the structure of the used activated complexes, the electronic and coordination states of the nickel center was considered.

Identification of Water Diffusivity of Inorganic Porous Materials Using Evolutionary Algorithms

2016 ◽  
Vol 113 (1) ◽  
pp. 51-66 ◽  
Author(s):  
Jan Kočí ◽  
Jiří Maděra ◽  
Miloš Jerman ◽  
Martin Keppert ◽  
Petr Svora ◽  
...  
Keyword(s):  
Evolutionary Algorithms ◽  
Porous Materials ◽  
Water Diffusivity ◽  
Inorganic Porous Materials

scholarly journals Combustion-Synthesized Porous CuO-CeO2-SiO2 Composites as Solid Catalysts for the Alkenylation of C(sp3)-H Bonds Adjacent to a Heteroatom via Cross-Dehydrogenative Coupling

Catalysts ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1252
Author(s):  
Ha V. Le ◽  
Vy B. Nguyen ◽  
Hai H. Pham ◽  
Khoa D. Nguyen ◽  
Phuoc H. Ho ◽  
...  
Keyword(s):  
Mixed Oxides ◽  
Coupling Reaction ◽  
Catalytic Performance ◽  
Composite Catalyst ◽  
High Porosity ◽  
One Pot ◽  
General Validity ◽  
Solid Catalysts ◽  
Surface Areas ◽  
Dehydrogenative Coupling

A series of mixed oxides of CuO, CeO2, and SiO2 were prepared by gel combustion and employed for the first time as efficient solid catalysts in a solvent-less liquid-phase cross-dehydrogenative coupling. The facile one-pot catalyst synthesis resulted in highly porous materials presenting large specific surface areas and strong metal–support interactions. The interaction with highly dispersed CeO2 enhanced the redox properties of the CuO species. The CuO-CeO2-SiO2 composites exhibited excellent catalytic performance for the selective coupling between 1,1-diphenylethylene and tetrahydrofuran with a yield up to 85% of 2-(2,2-diphenylvinyl)-tetrahydrofuran in the presence of di-tert-butyl peroxide (DTPB) and KI. Albeit both CuO and CeO2 species are proved to be responsible for the catalytic conversion, a great synergistic improvement in the catalytic activity was obtained by extended contact between the oxide phases by high porosity in comparison with the reactions using individual Cu or Ce catalysts. The activity of the composite catalyst was shown to be highly stable after five successive reaction cycles. Furthermore, the study scope was extended to the synthesis of different derivatives via composite-catalyzed coupling of C(sp2)-H with C(sp3-H) adjacent to a heteroatom. The good yields recorded proved the general validity of this composite for the cross-dehydrogenative coupling reaction rarely performed on solid catalysts.

Preparation of Well-Dispersed Nanosilver in MIL-101(Cr) Using Double-Solvent Radiation Method for Catalysis

NANO ◽  
2018 ◽  
Vol 13 (12) ◽  
pp. 1850145 ◽  
Author(s):  
Shuquan Chang ◽  
Chengcheng Liu ◽  
Heliang Fu ◽  
Zheng Li ◽  
Xian Wu ◽  
...  
Keyword(s):  
Particle Size ◽  
Silver Nanoparticles ◽  
Porous Materials ◽  
Chemical Treatment ◽  
Metal Organic Framework ◽  
Catalytic Performance ◽  
Radiation Method ◽  
Metal Organic ◽  
Excellent Catalytic Performance ◽  
Organic Framework

In this study, a double-solvent radiation method is proposed to prepare silver nanoparticles in the pores of metal-organic framework MIL-101(Cr). The results reveal that well-dispersed silver nanoparticles with a diameter of about 2[Formula: see text]nm were successfully fabricated in the cages of monodisperse octahedral MIL-101(Cr) with a particle size of about 400[Formula: see text]nm. The structure of MIL-101(Cr) was not destroyed during the chemical treatment and irradiation. The resulting Ag/MIL-101 exhibits excellent catalytic performance for the reduction of 4-nitrophenol. This method can be extended to prepare other single or bimetallic components inside porous materials.

Nuclear Magnetic Resonance to investigate inorganic porous materials of interest in the cultural heritage field

2015 ◽  
Vol 27 (3) ◽  
pp. 297-310 ◽  
Author(s):  
Valeria Di Tullio ◽  
Donatella Capitani ◽  
Giorgio Trojsi ◽  
Silvia Vicini ◽  
Noemi Proietti
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Cultural Heritage ◽  
Porous Materials ◽  
Inorganic Porous Materials ◽  
Nuclear Magnetic

Characterization and Preparation of Paraffin/Modified Inorganic Porous Materials Composites as Building Energy Storage Materials

2012 ◽  
Vol 450-451 ◽  
pp. 1419-1424 ◽  
Author(s):  
Liang Zhao ◽  
Rui Ying Ma ◽  
Xiang Lan Meng ◽  
Gang Wang ◽  
Xiang Chen Fang
Keyword(s):  
Energy Storage ◽  
Composite Materials ◽  
Phase Change ◽  
Porous Materials ◽  
Inorganic Materials ◽  
Energy Storage Materials ◽  
Porous Network ◽  
Storage Materials ◽  
Composite Energy ◽  
Inorganic Porous Materials

Paraffin and modified inorganic porous materials composites as phase change energy storage materials were prepared by absorbing paraffin in porous network of inorganic materials. In composite materials, paraffin was used as phase change material (PCM) for thermal energy storage, and γ-Al2O3 acted as supporting material, ethanol was solvent. A series of characterization were conducted to analyse and test the performance of the composite materials, and differential scanning calorimeter (DSC) results showed that the PCM-3 composite has the melting latent heat of 115.9 kJ/kg with melting temperature of 63.0°C. Due to the capillary and surface tension forces between paraffin and γ-Al2O3, the leakage of melted paraffin from the composites can be prevented. Several kinds of paraffin mixtures were also studied by adsorbing into the supporting materials, so that the composite energy storage materials with different phase change temperature can be used in the building wall to storage thermal of different regions. In a word, the paraffin/γ-Al2O3 composites have a good thermal stability and can be used repeatedly.

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