Preparation of highly active and hydrothermally stable nickel catalysts

Li, Shaozhong; Chen, Hui; Shen, Jianyi

doi:10.1016/j.jcis.2015.01.081

Cited by 19 publications

(12 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The improvement of the hydrothermal stability of γ‐alumina in the presence of Si has been reported previously . The increased hydrothermal stability of alumina has been related to the resistance to the cleavage of Si−O−Si and Si−O−Al bonds, the existence of which is demonstrated here.…”

Section: Resultssupporting

confidence: 82%

“…It has been shown that the support may undergo an increase of its hydrothermal stability in the presence of the active phase or by doping by catalytically inactive metal ions or p‐block atoms . However, the approaches described in the open and patent literature mostly remain phenomenological and there is still little fundamental understanding of the role played by these inhibitors at the molecular level.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Inhibition by Inorganic Dopants of γ‐Alumina Chemical Weathering under Hydrothermal Conditions: Identification of Reactive Sites and their Influence in Fischer–Tropsch Synthesis

et al. 2017

View full text Add to dashboard Cite

Understanding how alumina degradation to boehmite AlOOH can be prevented under hydrothermal conditions is key to design more stable catalysts supported on alumina for Fischer–Tropsch synthesis. We compare the effect of four inorganic dopants to inhibit γ‐alumina chemical weathering under hydrothermal conditions: three metal ions: Mg2+, Zr4+, Ni2+, introduced by impregnation, and nonmetal Si, introduced by the grafting of tetraethyl orthosilicate. Boehmite is formed by a mechanism of dissolution–precipitation. A significant decrease of alumina weathering to boehmite is evidenced for all dopants. For metal ions, the thermal conversion of doped γ‐Al2O3 into an alumina‐rich mixed oxide or the coverage of the alumina surface by particles of a poorly soluble oxide such as NiO contribute to the stabilization of the solid. Alumina dissolution and degradation are only inhibited fully through Si grafting. IR spectra in the OH stretching region suggest that the most reactive alumina sites toward dissolution are basic Al−OH sites located on lateral facets that are blocked upon Si introduction. Fischer–Tropsch reactivity shows that Co catalysts prepared on Mg2+‐ and Si‐doped supports are less active or, at best, as active as a reference Co/γ‐Al2O3 catalyst, which is explained by a lower reducibility of CoO on doped supports. The Co catalyst prepared on Mg2+‐doped γ‐Al2O3 calcined at 900 °C exhibits the best combination of catalytic activity, ease of preparation, and hydrothermal stability.

show abstract

Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Inhibition by Inorganic Dopants of γ‐Alumina Chemical Weathering under Hydrothermal Conditions: Identification of Reactive Sites and their Influence in Fischer–Tropsch Synthesis

et al. 2017

View full text Add to dashboard Cite

show abstract

“…21 Meanwhile, metallic nickel is readily available and of low cost, which is widely used in catalysts for many hydrogenation processes. [22][23][24] Therefore, in this work, heterogeneous nickel catalysts were introduced into the N-alkylation of IPA with IPO to afford DIPA in a fixed-bed reactor, and the effect of surface acidity and basicity of the Ni catalysts on the N-alkylation reaction was investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface acidity and basicity of supported Ni catalysts on theN-alkylation of isopropylamine with isopropanol

Guo

et al. 2022

React. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Due to the high surface areas and thermal stabilities, Al 2 O 3 is widely used as a support in industry. [16] And it was found to increase the surface area and exposed Cu surface area (S Cu ), which promoted the CO 2 hydrogenation to methanol. [17] In addition, the mesoporous materials showed great potential applications in catalysis due to their unique properties, such as the controllable morphologies, high surface area and tunable pore size.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient CO₂ Hydrogenation to Methanol over the Mesostructured Cu/AlZnO Catalyst

Guo

et al. 2021

Eur J Inorg Chem

Self Cite

View full text Add to dashboard Cite

In this work, the mesostructured Cu/AlZnO catalysts were prepared for the CO 2 hydrogenation to methanol. Experimental results showed that the weight ratio of Al 2 O 3 and ZnO affected the morphology of the mesoporous AlZnO supports and surface properties of the mesostructured Cu/AlZnO catalysts. The AlZnO-9 (the Al 2 O 3 mass within the AlZnO support was 90 wt%) with loose spongy porous structure and high surface area facilitated the Cu nanoparticle dispersion. Thus, the Cu/AlZnO-9 catalyst showed higher exposed Cu surface area (S Cu ) and more exposed CO 2 adsorption sites, which accelerated the CO 2 conversion. Meanwhile, the ZnO added into catalysts increased the strength of surface basicity and the surface concentration of Zn species, which promoted the catalytic activity of CO 2 hydrogenation to methanol. In addition, the well mesostructure heightened the stability of supported Cu catalyst due to the high dispersion of Cu nanoparticles.

show abstract

Preparation of highly active and hydrothermally stable nickel catalysts

Cited by 19 publications

References 33 publications

Inhibition by Inorganic Dopants of γ‐Alumina Chemical Weathering under Hydrothermal Conditions: Identification of Reactive Sites and their Influence in Fischer–Tropsch Synthesis

Inhibition by Inorganic Dopants of γ‐Alumina Chemical Weathering under Hydrothermal Conditions: Identification of Reactive Sites and their Influence in Fischer–Tropsch Synthesis

Effect of surface acidity and basicity of supported Ni catalysts on theN-alkylation of isopropylamine with isopropanol

Highly Efficient CO₂ Hydrogenation to Methanol over the Mesostructured Cu/AlZnO Catalyst

Contact Info

Product

Resources

About

Preparation of highly active and hydrothermally stable nickel catalysts

Cited by 19 publications

References 33 publications

Inhibition by Inorganic Dopants of γ‐Alumina Chemical Weathering under Hydrothermal Conditions: Identification of Reactive Sites and their Influence in Fischer–Tropsch Synthesis

Inhibition by Inorganic Dopants of γ‐Alumina Chemical Weathering under Hydrothermal Conditions: Identification of Reactive Sites and their Influence in Fischer–Tropsch Synthesis

Effect of surface acidity and basicity of supported Ni catalysts on theN-alkylation of isopropylamine with isopropanol

Highly Efficient CO2 Hydrogenation to Methanol over the Mesostructured Cu/AlZnO Catalyst

Contact Info

Product

Resources

About

Highly Efficient CO₂ Hydrogenation to Methanol over the Mesostructured Cu/AlZnO Catalyst