ZrO 2 -modified Ni/LaAl 11 O 18 catalyst for CO methanation: Effects of catalyst structure on catalytic performance

艾红梅,; 杨洪远,; 刘庆,; 赵国明,; 杨静,; 古芳娜,

doi:10.1016/s1872-2067(17)62995-4

Cited by 30 publications

(14 citation statements)

References 57 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As expected, the peaks attributing to Ni 2+ are observed on the Ni 2p spectrum of the calcined 20NA5L (20NA5L‐Ox) (Figure a). It can be seen from Figure a that Ni 0 and Ni 2+ are present simultaneously on the reduced state (20NA5L‐Re), and the peak at 852.9 eV is attributed to Ni 0 (Figure a) . The existence of Ni 2+ species in the reduced catalyst is because of the oxidation of the surface of the catalyst during storage or transfer.…”

Section: Resultsmentioning

confidence: 96%

La₂O₃‐Promoted Ni/Al₂O₃ Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

Zhang

Liu

2019

Energy Tech

Self Cite

View full text Add to dashboard Cite

To simultaneously inhibit Ni sintering and coke formation, while maintaining high catalytic activity, Ni–La2O3/Al2O3 catalysts are prepared by a modified deposition–precipitation (DP) method and applied for the CO methanation reaction. The activity of the catalyst prepared by the DP method is much higher than those prepared by the traditional impregnation and co‐impregnation methods due to the promotion of La2O3 as well as its unique dispersion on the surface of the catalyst. In the 100 h‐lifetime test under the conditions of 450 °C, 0.1 MPa, a weight hourly space velocity (WHSV) of 120 000 mL g−1 h−1, the Ni–La2O3/Al2O3 catalyst prepared by the DP method shows high catalytic stability. The characterization results show that La2O3 species can be deposited on the surface of the catalyst during the preparation process and can act as a physical barrier to prevent sintering of Ni particles and coke formation during high‐temperature reduction and reaction. La2O3 species can improve the reducibility of Ni particles and decrease the Ni particle sizes, resulting in larger H2 uptake and higher catalytic activity. Furthermore, the La3+/La2+ redox can also decrease coke formation by increasing the active oxygen species on the Ni surface.

show abstract

Section: Resultsmentioning

confidence: 96%

La₂O₃‐Promoted Ni/Al₂O₃ Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

Zhang

Liu

2019

Energy Tech

Self Cite

View full text Add to dashboard Cite

show abstract

“…Figure shows the nitrogen adsorption‐desorption isotherm and pore size distribution curves of the carrier MCF and m PW/MCF catalysts. It is seen that the MCF sample exhibits a typical H1 isotherm with a hysteresis loop exists in the middle and high pressure regions . The foamed mesoporous silica MCF material has spherical channels, whose pore size distribution should be counted using the Broekhoff‐de Boer‐Frenkel‐Halsey‐Hill (BdB) model.…”

Section: Resultsmentioning

confidence: 99%

Three‐Component Mannich Reaction Catalyzed by Mesostructured Cellular Foam Silica Immobilized H₃PW₁₂O₄₀

et al. 2019

Self Cite

View full text Add to dashboard Cite

One-pot three-component Mannich reaction was carried out at room temperature using mesocellular cellular foam (MCF) silica loaded H 3 PW 12 O 40 as catalyst. The H 3 PW 12 O 40 /MCF catalyst was prepared by the traditional impregnation method and confirmed by a series of characterizations such as nitrogen adsorption, X-ray diffraction (XRD), Fourier-transform infrared spectra (FT-IR), scanning electron microscope (SEM) and transmission electron microscopy (TEM). The results showed that the H 3 PW 12 O 40 /MCF catalyst with 50 wt% loading of H 3 PW 12 O 40 exhibited the highest catalytic activity for the Mannich reaction of benzaldehyde, aniline and acetophenone with the yield of 94% in 1.8 hours under the optimal condition. In addition, the H 3 PW 12 O 40 /MCF catalyst could be easily recycled and reused four times without significant decline of activity. This work provided an improved modification of the three-component Mannich reaction in terms of efficient activity, mild reaction conditions, clean reaction profiles and a simple workup procedure.

show abstract

“…6 shows nitrogen adsorption–desorption isotherms of Bi 2 O 3 nanosheet and commercial α‐Bi 2 O 3 particle. According to the IUPAC classification, the adsorption isotherm of a commercial α‐Bi 2 O 3 particle is type IV with a negligible hysteresis loop owing to its macroporous and non‐porous structure [13, 39]. On the other hand, the adsorption isotherm of the Bi 2 O 3 nanosheet belongs to type IV with an H3‐type hysteresis loop [40].…”

Section: Resultsmentioning

confidence: 99%

Biotemplate preparation of Bi ₂ O ₃ nanosheet for enhanced photodegradation of methylene blue

Yang

Wang

Zhao

et al. 2019

Micro & Nano Letters

Self Cite

View full text Add to dashboard Cite

Bi 2 O 3 nanosheet was synthesised using China rose petal as a biotemplate for the photodegradation of methylene blue under xenon lamp irradiation. The samples were characterised by thermogravimetric analysis-differential scanning calorimetric analysis, Fourier-transform infrared spectroscopy, nitrogen adsorption, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The results revealed that the Bi 2 O 3 nanosheet with pure monoclinic phase was successfully synthesised by replication of the petal template with a thickness of about 100 nm, and showed the absorption thresholds wavelength of 480 nm. Moreover, the Bi 2 O 3 nanosheet exhibited 94.84% degradation efficiency of photodegradation of methylene blue in 180 min, which was much more active than that of the commercial α-Bi 2 O 3 due to its high specific surface area of 45.7 m 2 g −1 and wide band gap of 3.10 eV.

show abstract

ZrO 2 -modified Ni/LaAl 11 O 18 catalyst for CO methanation: Effects of catalyst structure on catalytic performance

Cited by 30 publications

References 57 publications

La₂O₃‐Promoted Ni/Al₂O₃ Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

La₂O₃‐Promoted Ni/Al₂O₃ Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

Three‐Component Mannich Reaction Catalyzed by Mesostructured Cellular Foam Silica Immobilized H₃PW₁₂O₄₀

Biotemplate preparation of Bi ₂ O ₃ nanosheet for enhanced photodegradation of methylene blue

Contact Info

Product

Resources

About

ZrO 2 -modified Ni/LaAl 11 O 18 catalyst for CO methanation: Effects of catalyst structure on catalytic performance

Cited by 30 publications

References 57 publications

La2O3‐Promoted Ni/Al2O3 Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

La2O3‐Promoted Ni/Al2O3 Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

Three‐Component Mannich Reaction Catalyzed by Mesostructured Cellular Foam Silica Immobilized H3PW12O40

Biotemplate preparation of Bi 2 O 3 nanosheet for enhanced photodegradation of methylene blue

Contact Info

Product

Resources

About

La₂O₃‐Promoted Ni/Al₂O₃ Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

La₂O₃‐Promoted Ni/Al₂O₃ Catalyst for CO Methanation: Enhanced Catalytic Activity and Stability

Three‐Component Mannich Reaction Catalyzed by Mesostructured Cellular Foam Silica Immobilized H₃PW₁₂O₄₀

Biotemplate preparation of Bi ₂ O ₃ nanosheet for enhanced photodegradation of methylene blue