CO2 methanation and co-methanation of CO and CO2 over Mn-promoted Ni/Al2O3 catalysts

Zhao, Kechao; Li, Zhenhua; Bian, Li

doi:10.1007/s11705-016-1563-5

Cited by 77 publications

(49 citation statements)

References 28 publications

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“…Liu [24] suggested that the disappearance of the diffraction peaks of the Cr species may be due to their incorporation into the support skeleton or inferior crystallinity. High dispersion may also account for that according to some other authors [25,26].…”

Section: Co H O → Comentioning

confidence: 81%

The Synergy Effect of Ni-M (M = Mo, Fe, Co, Mn or Cr) Bicomponent Catalysts on Partial Methanation Coupling with Water Gas Shift under Low H2/CO Conditions

et al. 2017

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Ni-M (M = Mo, Fe, Co, Mn or Cr) bicomponent catalysts were prepared through the co-impregnation method for upgrading low H 2 /CO ratio biomass gas into urban gas through partial methanation coupling with water gas shift (WGS). The catalysts were characterized by N 2 isothermal adsorption, X-ray diffraction (XRD), H 2 temperature programmed reduction (H 2 -TPR), H 2 temperature programmed desorption (H 2 -TPD), scanning electron microscopy (SEM) and thermogravimetry (TG). The catalytic performances demonstrated that Mn and Cr were superior to the other three elements due to the increased fraction of reducible NiO particles, promoted dispersion of Ni nanoparticles and enhanced H 2 chemisorption ability. The comparative study on Mn and Cr showed that Mn was more suitable due to its smaller carbon deposition rate and wider adaptability to various H 2 /CO and H 2 O/CO conditions, indicating its better synergy effect with Ni. A nearly 100 h, the lifetime test and start/stop cycle test further implied that 15Ni-3Mn was stable for industrial application.

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Section: Co H O → Comentioning

confidence: 81%

The Synergy Effect of Ni-M (M = Mo, Fe, Co, Mn or Cr) Bicomponent Catalysts on Partial Methanation Coupling with Water Gas Shift under Low H2/CO Conditions

et al. 2017

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“…Overall, the trends of CO conversion and CH 4 yield of all catalysts increase first and then decrease in the total temperature range. This is because CO methanation is a strong exothermic reaction, and high temperature is not conducive to the reaction . The CO conversion of 20NA1L reaches the maximum at 450 °C with 97.2%, which can almost reach thermodynamic equilibrium.…”

Section: Resultsmentioning

confidence: 97%

“…Overall, there are two separate desorption peaks with varied intensities for all the catalysts. The low‐temperature peak at around 173 °C is attributed to the chemisorbed hydrogen on the highly dispersed Ni nanoparticles, which has a higher number of defect sites and can serve as a capture center for surface hydrogen, thereby reducing the activation energy of H 2 dissociation. The high‐temperature peak at around 367 °C is attributed to the adsorption of hydrogen on the surface of bulk Ni particles.…”

Section: Resultsmentioning

confidence: 99%

“…Figure is the X‐ray diffraction (XRD) patterns of the reduced catalysts. For 20NA, the three diffraction peaks at 44.7, 52.1, and 76.4° are the characteristic peaks of γ ‐Al 2 O 3 (JCPDS 00‐034‐0493), and the three diffraction peaks at 34.4, 45.9, and 67.0° are attributed to (111), (200), and (220) planes of metallic Ni (JCPDS 01‐070‐1849) . No diffraction peak of La 2 O 3 is observed on the XRD patterns of 20NA x L and 20NA1L‐Im, indicating that La 2 O 3 species disperse highly on the surface of the catalysts.…”

Section: Resultsmentioning

confidence: 99%

“…This is because CO methanation is a strong exothermic reaction, and high temperature is not conducive to the reaction. [35] The CO conversion of 20NA1L reaches the maximum at 450 C with 97.2%, which can almost reach thermodynamic equilibrium. Moreover, other catalysts exhibit lower CO conversion than that of 20NA1L especially in the temperature below 450 C. While CH 4 selectivity of all the catalysts is similar, and the main side product detected by GC is CO 2, as a result, 20NA1L shows the highest CH 4 yield of 82.2% at 450 C. Compared with 20NA, the activity of 20NAxL significantly improves after the addition of La 2 O 3 especially for CO conversion.…”

Section: Catalytic Properties Of the Catalystsmentioning

confidence: 93%

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

Zhang

Liu

2019

Energy Tech

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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.

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New Opportunity for Carbon‐Supported Ni‐based Electrocatalysts: Gas‐Phase CO₂ Methanation

et al. 2021

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The cost‐effectiveness and excellent performance of conductive‐carbon‐supported Ni‐based electrocatalysts make them attractive materials for hydrogen oxidation and evolution reactions. However, they were previously unused in gas‐phase hydrogenation reactions. In this work, we have expanded the applicability of commercially available advanced Ni/C, NiMo/C and NiRe/C materials from electrocatalysis to heterogeneous catalysis of CO2 methanation. Our catalytic testing efforts indicate that the monometallic Ni/C material demonstrates the best CO2 methanation properties, achieving an excellent CO2 conversion of 83 % at 400 °C with nearly complete selectivity to CH4 of 99.7 %, plus exhibiting intact performance during 90 h of time‐on‐stream testing. Such catalytic properties are among the highest reported to date among carbon‐supported Ni‐based methanation catalysts. Excellent performance of Ni/C stems from the good dispersion of the Ni nanoparticles over N‐containing carbon support material.

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CO2 methanation and co-methanation of CO and CO2 over Mn-promoted Ni/Al2O3 catalysts

Cited by 77 publications

References 28 publications

The Synergy Effect of Ni-M (M = Mo, Fe, Co, Mn or Cr) Bicomponent Catalysts on Partial Methanation Coupling with Water Gas Shift under Low H2/CO Conditions

The Synergy Effect of Ni-M (M = Mo, Fe, Co, Mn or Cr) Bicomponent Catalysts on Partial Methanation Coupling with Water Gas Shift under Low H2/CO Conditions

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

New Opportunity for Carbon‐Supported Ni‐based Electrocatalysts: Gas‐Phase CO₂ Methanation

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CO2 methanation and co-methanation of CO and CO2 over Mn-promoted Ni/Al2O3 catalysts

Cited by 77 publications

References 28 publications

The Synergy Effect of Ni-M (M = Mo, Fe, Co, Mn or Cr) Bicomponent Catalysts on Partial Methanation Coupling with Water Gas Shift under Low H2/CO Conditions

The Synergy Effect of Ni-M (M = Mo, Fe, Co, Mn or Cr) Bicomponent Catalysts on Partial Methanation Coupling with Water Gas Shift under Low H2/CO Conditions

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

New Opportunity for Carbon‐Supported Ni‐based Electrocatalysts: Gas‐Phase CO2 Methanation

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Product

Resources

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

New Opportunity for Carbon‐Supported Ni‐based Electrocatalysts: Gas‐Phase CO₂ Methanation