CeO2-Promoted Highly Active Catalyst, NiSO4/CeO2-ZrO2 for Ethylene Dimerization

doi:10.5012/bkcs.2006.27.12.1989

Cited by 4 publications

(2 citation statements)

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“…368 Zirconia has also been promoted by cerium after the coprecipitation of zirconium oxychloride and cerium nitrate and impregnating the resulting solid with NiSO 4 . 369 The maximum activity was achieved with 10 wt % NiSO 4 and only 1 mol % CeO 2 . CeO 2 plays a similar role to Fe 2 O 3 by stabilizing zirconia, enhancing the specific surface area and increasing the acidity.…”

Section: Ni/other Supportsmentioning

confidence: 92%

“…NiSO 4 /Fe 2 O 3 alone was also active for ethylene oligomerization with a maximum activity at a high nickel loading of 20 wt % . Zirconia has also been promoted by cerium after the coprecipitation of zirconium oxychloride and cerium nitrate and impregnating the resulting solid with NiSO 4 . The maximum activity was achieved with 10 wt % NiSO 4 and only 1 mol % CeO 2 .…”

Section: Nickel-promoted Oxide Supports For Olefin Oligomerizationmentioning

confidence: 99%

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Nickel Catalyzed Olefin Oligomerization and Dimerization

et al. 2020

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Brought to life more than half a century ago and successfully applied for high-value petrochemical intermediates production, nickel-catalyzed olefin oligomerization is still a very dynamic topic, with many fundamental questions to address and industrial challenges to overcome. The unique and versatile reactivity of nickel enables the oligomerization of ethylene, propylene and butenes into a wide range of oligomers that are highly sought-after in numerous fields to be controlled. Interestingly, both homogeneous and heterogeneous nickel catalysts have been scrutinized and employed to do this. This rare specificity encouraged us to interlink them in this review so as to open up opportunities for further catalyst development and innovation. An in-depth understanding of the reaction mechanisms in play is essential to being able to fine-tune the selectivity and achieve efficiency in the rational design of novel catalytic systems. This review thus provides a complete overview of the subject, compiling the main fundamental/industrial milestones and remaining challenges facing homogeneous/heterogeneous approaches as well as emerging catalytic concepts, with a focus on the last 10 years.

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Section: Ni/other Supportsmentioning

confidence: 92%

Section: Nickel-promoted Oxide Supports For Olefin Oligomerizationmentioning

confidence: 99%

Nickel Catalyzed Olefin Oligomerization and Dimerization

et al. 2020

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Catalytic wet air oxidation of phenol over ultrasound-assisted synthesized Ni/CeO2–ZrO2 nanocatalyst used in wastewater treatment

Parvas

Haghighi

Allahyari

2019

Arabian Journal of Chemistry

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Non-noble metal Ni with different loadings was coated on precipitated CeO 2 -ZrO 2 support by the sonochemistry method and examined for catalytic wet air oxidation of phenol. The structure of the nanocatalysts was determined by BET, FESEM, XRD, and FTIR analyses. The results showed non-uniform morphology of the nanocatalyst at lower Ni contents changed to homogenous morphology with spherical nano particles at higher Ni contents. While the size of NiO crystals remained constant with rising Ni content, the crystallinity of NiO significantly increased. If the crystallinity of NiO was 100% in 20% wt Ni/CeO 2 -ZrO 2 , the crystallinity of NiO in 5% wt Ni was found to be 41.13%. The average particle size in Ni(15%)/CeO 2 -ZrO 2 was 77 nm in which 85.71% of particle diameters were less than 100 nm. Catalytic wet air oxidation of phenol with different Ni loadings indicated improvement of phenol destruction at higher amounts of active phase. Removal of phenol increased with increasing catalyst loading from 4 to 9.0 g/l but further increase to 10 g/l declined the catalyst reactivity. ª 2014 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).

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Degradation of phenol via wet-air oxidation over CuO/CeO₂–ZrO₂nanocatalyst synthesized employing ultrasound energy: physicochemical characterization and catalytic performance

Parvas

Haghighi

Allahyari

2013

Environmental Technology

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Catalytic wet air oxidation (CWAO) of phenol was carried out under atmospheric pressure of oxygen at 160 degrees C in a stirred batch reactor over copper catalysts supported by CeO2-ZrO2. The copper with different loadings were impregnated over the composite support by a sonication process. The catalysts were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray analysis (EDX), Brunauer-Emmett-Teller (BET) specific surface area and Fourier-transformed infrared analyses. Characteristic peaks attributed to copper were not found in XRD patterns even at high loadings, but based on EDX results, the existence of copper particles was confirmed. It means that sonochemical synthesis method even at high loadings produced small copper particles with low crystallinity and excellent dispersion over the CeO2-ZrO2 composite. FESEM micrographs indicated just slight enhancement in particle size at high loadings of Cu. Blank CWAO experiments illustrated low conversion of phenol using bare CeO2-ZrO2 support. Although some agglomeration of particles was found at high loadings of copper but owning to the fact that almost all ZrO2 particles incorporated into the CeO2 lattice at high contents of Cu, catalyst activity not only did not decrease but also the phenol conversion reached to the higher values. The optimal catalyst loading for phenol degradation was found to be 9 g/l. Complete conversion of phenol was achieved using CuO/CeO2-ZrO2 in 9 g/l catalyst loading with initial phenol concentration of 1000 ppm after 3 h of reaction.

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CeO2-Promoted Highly Active Catalyst, NiSO4/CeO2-ZrO2 for Ethylene Dimerization

Cited by 4 publications

References 50 publications

Nickel Catalyzed Olefin Oligomerization and Dimerization

Nickel Catalyzed Olefin Oligomerization and Dimerization

Catalytic wet air oxidation of phenol over ultrasound-assisted synthesized Ni/CeO2–ZrO2 nanocatalyst used in wastewater treatment

Degradation of phenol via wet-air oxidation over CuO/CeO₂–ZrO₂nanocatalyst synthesized employing ultrasound energy: physicochemical characterization and catalytic performance

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CeO2-Promoted Highly Active Catalyst, NiSO4/CeO2-ZrO2 for Ethylene Dimerization

Cited by 4 publications

References 50 publications

Nickel Catalyzed Olefin Oligomerization and Dimerization

Nickel Catalyzed Olefin Oligomerization and Dimerization

Catalytic wet air oxidation of phenol over ultrasound-assisted synthesized Ni/CeO2–ZrO2 nanocatalyst used in wastewater treatment

Degradation of phenol via wet-air oxidation over CuO/CeO2–ZrO2nanocatalyst synthesized employing ultrasound energy: physicochemical characterization and catalytic performance

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Degradation of phenol via wet-air oxidation over CuO/CeO₂–ZrO₂nanocatalyst synthesized employing ultrasound energy: physicochemical characterization and catalytic performance