Effects of calcination temperatures on the structure–activity relationship of Ni–La/Al<sub>2</sub>O<sub>3</sub> catalysts for syngas methanation

Wang, Hongli; Zou, Meng; Guo, Lisheng; Ma, Fengyun; Mo, Wen‐Long; Yu, Yuming; Mian, Inamullah; Liu, Jingmei; Yin, Shuangjie; Tsubaki, Noritatsu

doi:10.1039/c9ra09674d

Cited by 9 publications

(7 citation statements)

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“…It was reported that in few studies, the calcination temperature had shown significant impact on the crystallite sizes of the active metal as well as its dispersion and therefore it positively affected on the catalyst activity and stability [12], [18]. Moreover, it has been noted that the activity of the catalyst depends on particle size of the nickel oxide [15].…”

Section: X-ray Diffractogram Of Ni/zro2 Catalysts Processed For Diffe...mentioning

confidence: 99%

“…In order to synthesize a catalyst suitable for implementation to industrial scale, it is necessary to establish suitable parameters for its preparation. The calcination temperature of a catalyst is one of the main factors determining its activity, and the activity of supported metal catalysts strongly depends on the temperature and time of heat treatment [12], [18]. Therefore, in this work, we aimed to determine the effect of calcination temperature and time of Ni/ZrO2 catalyst to its structure and properties.…”

Section: Introductionmentioning

confidence: 99%

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Study on Ni/ZrO2 catalyst preparation

Dashnamjil

Bold

Erdenee

2022

J. appl. sci. eng., A

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In this work, the influence of catalyst preparation temperature on its structure was investigated. We have synthesized 12 different Ni/ZrO2 catalysts by varying the calcination temperature, time, and active metal content, and these catalysts will be further used in the carbon dioxide methanation reaction. Structure and properties of the catalysts were determined using XRD and SEM analysis. Therefore, Ni content of the catalysts were measured by ICP-OES.Regarding to the crystal size calculation using XRD data by Scherer equation, when calcination time was increased the average crystal size of nickel oxide was decreased from 42.38 nm to 38.93 nm whereas it decreased to 39.23 nm when the calcination temperature was increased. This shows that the distribution of active metals in the catalyst increases when the heat treatment parameters are increased. In addition, it can be assumed that the activity of the catalyst can be enhanced when the calcination temperature and time were increases.

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Section: X-ray Diffractogram Of Ni/zro2 Catalysts Processed For Diffe...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Ni/ZrO2 catalyst preparation

Dashnamjil

Bold

Erdenee

2022

J. appl. sci. eng., A

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“…Three peaks could be distinguished (denominated α, β, and γ) on both catalysts, and the content of each peak is presented in Table . The first peak (α) at 400–500 °C was related to the reduction of NiO species with weak interaction between zirconia, which might be easy to sinter during the DRM reaction. , The second peak (β) at 500–600 °C corresponded to the reduction of NiO species inside the mesoporous network with strong interaction between zirconium, which could maintain the original state even after reduction and reaction. − The third peak (γ) at 600–800 °C was assigned to the NiO species in the skeleton of ZrO 2 and ZrO 2 species. , The proportion of three peaks on NiO–10Al 2 O 3 –ZrO 2 and NiO–ZrO 2 catalysts is shown in Table . The content of the β peak was about 40% on the NiO–10Al 2 O 3 –ZrO 2 catalyst, which was higher than the one on the NiO–ZrO 2 catalyst (15%) because the NiO–10Al 2 O 3 –ZrO 2 catalyst exhibited a large pore volume and pore diameter.…”

Section: Resultsmentioning

confidence: 99%

Syngas Production via CO₂ Reforming of Methane over Aluminum-Promoted NiO–10Al₂O₃–ZrO₂ Catalyst

Wang

et al. 2021

ACS Omega

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CO 2 reforming of methane was studied at medium temperature (700 °C) using a GSHV of 48,000 h –1 over nickel catalysts supported on ZrO 2 promoted by alumina. The catalysts were prepared by a one-step synthesis method and characterized by BET, H 2 -TPR, XRD, XPS, TEM, Raman spectroscopy, and TGA. The NiO–10Al 2 O 3 –ZrO 2 catalyst exhibited higher catalytic performance in comparison with the NiO–ZrO 2 catalyst. The enhancement of catalytic activity in dry reforming could be associated with the alterations in surface properties due to Al promotion. First, the Al promoter could modify the structure of ZrO 2 , leading to an increase of its pore volume and pore diameter. Second, the NiO–10Al 2 O 3 –ZrO 2 catalyst exhibited high resistance to sintering. Third, the NiO–10Al 2 O 3 –ZrO 2 catalyst showed high suppression to the loss of nickel during a long-term catalytic test. Finally, the addition of Al could inhibit the reduction of ZrO 2 during the reduction and reaction, endowing further the stability.

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“…Gao et al [18] used slurry-bed reactor to explore the influence of alkali metal on the structure and performance of Ni-Al 2 O 3 catalyst. Wu et al [19] studied effects of calcination temperatures on the structure-activity relationship of NiÀ La/Al 2 O 3 catalysts for syngas methanation in a slurry-bed reactor. Meng et al [20] also applied a slurry-bed reactor in methanation to investigate the influence of preparation conditions on the catalytic performance of LaÀ Ni/Al 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

Effect of MgO Promoter on the Structure, Performance and Carbon Deposition of Ni‐Al₂O₃ Catalyst for CO Methanation Based‐on Slurry‐bed Reactor

Huang

Zou

et al. 2022

ChemistrySelect

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A series of Ni/MgO-Al 2 O 3 catalysts with different MgO abundance were prepared by mechanochemical method for CO methanation based-on slurry-bed reactor. The prepared catalysts were characterized by X-ray diffraction (XRD), H 2 temperature-programmed reduction (H 2 -TPR), N 2 adsorption-desorption, thermogravimetric analysis (TG-DTG) and temperatureprogrammed hydrogenation (TPH) techniques, and CO methanation performance evaluation was carried out for the samples. Results showed that the catalyst with MgO loading of 2 wt.% (Ni/MgO (2) -Al 2 O 3 ) presented smaller Ni grain size of 9.64 nm and larger specific surface area of 329 m 2 ⋅ g À 1 , indicating that a well dispersion of active component on the catalyst. Evaluation results showed that Ni/MgO (2) -Al 2 O 3 could improve the activity of catalyst for CO methanation. Carbon deposition analysis, from TG-DTG characterization, found that MgO could significantly inhibit the formation of carbon deposition in the reaction process. The amount of carbon deposition on Ni/ MgO (2) -Al 2 O 3 was the least, only 6.5 %, and the deposited carbon was consisted with the results obtained from TPH analysis. Kinetic analysis showed that the carbon removal reaction mainly occurred at the stage of 250-550 °C. And the activation energy from carbon removal reaction for Ni/MgO (2) -Al 2 O 3 was lower to 13.12 kJ/mol, demonstrating that the catalyst with MgO as additive is more beneficial to anti-carbon ability.

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Effects of calcination temperatures on the structure–activity relationship of Ni–La/Al₂O₃ catalysts for syngas methanation

Abstract: Calcination temperature affects the existing types of NiO, and the influence of the three NiO types on the catalytic activity of samples is bound type ≫ free type > combined type.

Cited by 9 publications

References 43 publications

Study on Ni/ZrO2 catalyst preparation

Study on Ni/ZrO2 catalyst preparation

Syngas Production via CO₂ Reforming of Methane over Aluminum-Promoted NiO–10Al₂O₃–ZrO₂ Catalyst

Effect of MgO Promoter on the Structure, Performance and Carbon Deposition of Ni‐Al₂O₃ Catalyst for CO Methanation Based‐on Slurry‐bed Reactor

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Effects of calcination temperatures on the structure–activity relationship of Ni–La/Al2O3 catalysts for syngas methanation

Abstract: Calcination temperature affects the existing types of NiO, and the influence of the three NiO types on the catalytic activity of samples is bound type ≫ free type > combined type.

Cited by 9 publications

References 43 publications

Study on Ni/ZrO2 catalyst preparation

Study on Ni/ZrO2 catalyst preparation

Syngas Production via CO2 Reforming of Methane over Aluminum-Promoted NiO–10Al2O3–ZrO2 Catalyst

Effect of MgO Promoter on the Structure, Performance and Carbon Deposition of Ni‐Al2O3 Catalyst for CO Methanation Based‐on Slurry‐bed Reactor

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Product

Resources

About

Effects of calcination temperatures on the structure–activity relationship of Ni–La/Al₂O₃ catalysts for syngas methanation

Syngas Production via CO₂ Reforming of Methane over Aluminum-Promoted NiO–10Al₂O₃–ZrO₂ Catalyst

Effect of MgO Promoter on the Structure, Performance and Carbon Deposition of Ni‐Al₂O₃ Catalyst for CO Methanation Based‐on Slurry‐bed Reactor