Promotion of CO2 methanation at low temperature over hydrotalcite-derived catalysts-effect of the tunable metal species and basicity

Guo, Xinpeng; Gao, Denglei; He, Hongyan; Traitangwong, Atsadang; Gong, Maoming; Meeyoo, Vissanu; Peng, Zhijian; Li, Chunshan

doi:10.1016/j.ijhydene.2020.09.193

Cited by 43 publications

(22 citation statements)

References 60 publications

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“…These results indicate that these catalysts facilitate the formation of linear CO and bridged CO reaction intermediates toward CO 2 methanation . In addition, the presence of characteristic bands of methyne (C–H) at 1302 cm –1 could be clearly observed . It is worth noting that the characteristic absorbance peaks of m-HCOO– (monodentate HCOO−) with different intensities are located around 1350 and 1581 cm –1 , while the absorbance peaks of m-CO 3 2– (monodentate CO 3 2– ) are located at around 1275 cm –1 .…”

Section: Discussionmentioning

confidence: 71%

“…47 In addition, the presence of characteristic bands of methyne (C−H) at 1302 cm −1 could be clearly observed. 48 It is worth noting that the characteristic absorbance peaks of m-HCOO− (monodentate HCOO−) with different intensities are located around 1350 and 1581 cm −1 , while the absorbance peaks of m-CO 3 2− (monodentate CO 3 2− ) are located at around 1275 cm −1 . m-HCOO− and m-CO 3 2− are both the reaction intermediates of CO 2 methanation reaction, 49 while the peak intensities of m-HCOO− over the N/D-120-12 catalyst are stronger than those of N/D-220-48-H at the same operation temperature.…”

Section: X-ray Diffraction Analysismentioning

confidence: 95%

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Synthesis and Regeneration of Ni-Phyllosilicate Catalysts Using a Versatile Double-Accelerator Method: A Comprehensive Study

Chen

Liu

2021

ACS Catal.

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Nickel phyllosilicate materials were usually prepared by the conventional hydrothermal method under severe conditions and ammonia evaporation method with unavoidable ammonia emission. To address these problems, a versatile double-accelerator method was proposed in this work, which could successfully synthesize nickel phyllosilicates through the hydrothermal treatment of silica and nickel nitrate at a quite low temperature of 40 °C or in an open system at 80 °C without autogenous pressure assisted by ammonium fluoride (NH4F) and urea. NH4F could accelerate the etching of silica to form the intermediate H4SiO4, and urea could facilitate the formation of a Ni(OH)2 intermediate, resulting in the quick formation of Ni-phyllosilicates. In addition, this method exhibited high universality to prepare various metal (Ni, Co, and Cu) phyllosilicates, and both silica materials and sodium metasilicate could be the potential silicon-containing precursors to prepare Ni-phyllosilicates. Furthermore, the sintered Ni/SiO2 catalyst could also be regenerated after in situ acid pickling and double-accelerator synthesis without decline of catalytic activity. The optimal Ni-phyllosilicate catalyst (N/D-120-12) prepared by the double-accelerator method exhibited a high CO2 conversion of 78.4% and a CH4 yield of 74.5% at 400 °C, which also obtained a low E a of 63.93 kJ·mol–1 and a high TOFCO2 (160 °C) of 3.1 × 10–2 s–1 for CO2 methanation. In situ DRIFTS results demonstrated that the presence of more m-HCOO– species on N/D-120-12 resulted in its high catalytic performance. Moreover, N/D-120-12 also exhibited high long-term and hydrothermal stability with an excellent anti-sintering property.

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Section: Discussionmentioning

confidence: 71%

Section: X-ray Diffraction Analysismentioning

confidence: 95%

Synthesis and Regeneration of Ni-Phyllosilicate Catalysts Using a Versatile Double-Accelerator Method: A Comprehensive Study

Chen

Liu

2021

ACS Catal.

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“…During the preparation of this article, we learned about the work by Guo et al, 64 who also have investigated Ni hydrotalcite-derived catalysts for CO 2 methanation with MgO and other metal oxides as the basic component. They have seen the same trend that there must be an optimum for the Mg/Al ratio because neither component by itself or more precisely its oxide results as the support in nickel hydrotalcitederived catalysts with the highest activity.…”

Section: Resultsmentioning

confidence: 99%

Methanation of CO₂ and CO by (Ni,Mg,Al)-Hydrotalcite-Derived and Related Catalysts with Varied Magnesium and Aluminum Oxide Contents

Völs

Hilbert

Störr

et al. 2021

Ind. Eng. Chem. Res.

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In the present study, the influence of the composition of Lewis basic (Mg,Al)O x mixed oxide supports on CO 2 and CO methanation performance of (Ni,Mg,Al)-hydrotalcite-derived catalysts is investigated. The hydrotalcite-derived and related precursors are synthesized by pH-controlled coprecipitation, calcination, and subsequent reduction. The catalysts with different supports prove suitability for CO 2 and for CO methanation but display significant differences in respect to the temperature sensitivity of the reactions. The influence of the systematically varied support composition was studied by kinetic measurements, X-ray photoelectron spectroscopy (XPS), and in situ diffuse reflectance infrared Fourier transform (DRIFTS). Performance differences between CO 2 and CO methanation were investigated for three different catalyst compositions. Different adsorption patterns in the DRIFTS measurements for these catalysts allow us to assign the increase in performance in the presence of magnesium oxide primarily to the enhancement of CO 2 adsorption on the catalyst support. Temperature-dependent DRIFTS measurements display a correlation between the ratio of formate to carbonyl species on the catalyst surface and the activity of the catalyst in the case of magnesiumcontaining catalysts. The result suggests the role of CO as a key intermediate for CO 2 methanation for magnesium-containing nickel hydrotalcite-derived catalysts. XPS measurements demonstrate that the magnesium content significantly affects the reducibility in the precursor material to generate the active component.

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“…In addition, mixed oxides prepared from Ni-hydrotalcites have shown good catalytic activity in CO 2 methanation. [22][23][24][25][26][27] Throughout these reports, Ni content was 20-75%, the gas hourly space velocity (GHSV) varied between 2400 and 40 000 h À1 , and the temperature was evaluated between 250 and 390 °C. Reported hydrotalcites were prepared at 9.6-12 pH with long aging times (18-48 h).…”

Section: Introductionmentioning

confidence: 99%

Low‐Temperature and Highly Active Nickel Catalyst Based on Hydrotalcite Mg–Al for CO₂ Methanation

2022

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Ni/hydrotalcite catalysts are synthesized by the coprecipitation method. Synthesis times are decreased and activation is performed with just a reductive calcination under mild conditions without the usual air‐calcination step. Compared with the other reported catalysts made of Ni/hydrotalcite, in terms of space–time yield (STY), the best synthesized catalyst is the most efficient one (STY = 137.19 mol CH4 h−1 L−1 at 300 °C) and this high efficiency is kept at low temperature (STY = 132.67 mol CH4 h−1 L−1 at 250 °C). Results show that the amount of reduced Ni, created upon the mild reduction, increases with the Ni loading and the Ni0 amount correlates with the catalytic activity. CO2 adsorption capacity remarkably increases with the Ni content but this trend does not correlate with the conversion. Surface areas, neither pore sizes, do not show a correlation with catalytic results. The most important result is the very high activity observed at temperatures below 300 °C. Characterization results indicate that the outstanding low‐temperature performance must be due to the presence of high amounts of small and reduced Ni crystallites with low interaction with the support. Developed catalysts are stable for 28 h at 300 °C.

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Promotion of CO2 methanation at low temperature over hydrotalcite-derived catalysts-effect of the tunable metal species and basicity

Cited by 43 publications

References 60 publications

Synthesis and Regeneration of Ni-Phyllosilicate Catalysts Using a Versatile Double-Accelerator Method: A Comprehensive Study

Synthesis and Regeneration of Ni-Phyllosilicate Catalysts Using a Versatile Double-Accelerator Method: A Comprehensive Study

Methanation of CO₂ and CO by (Ni,Mg,Al)-Hydrotalcite-Derived and Related Catalysts with Varied Magnesium and Aluminum Oxide Contents

Low‐Temperature and Highly Active Nickel Catalyst Based on Hydrotalcite Mg–Al for CO₂ Methanation

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Promotion of CO2 methanation at low temperature over hydrotalcite-derived catalysts-effect of the tunable metal species and basicity

Cited by 43 publications

References 60 publications

Synthesis and Regeneration of Ni-Phyllosilicate Catalysts Using a Versatile Double-Accelerator Method: A Comprehensive Study

Synthesis and Regeneration of Ni-Phyllosilicate Catalysts Using a Versatile Double-Accelerator Method: A Comprehensive Study

Methanation of CO2 and CO by (Ni,Mg,Al)-Hydrotalcite-Derived and Related Catalysts with Varied Magnesium and Aluminum Oxide Contents

Low‐Temperature and Highly Active Nickel Catalyst Based on Hydrotalcite Mg–Al for CO2 Methanation

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Product

Resources

About

Methanation of CO₂ and CO by (Ni,Mg,Al)-Hydrotalcite-Derived and Related Catalysts with Varied Magnesium and Aluminum Oxide Contents

Low‐Temperature and Highly Active Nickel Catalyst Based on Hydrotalcite Mg–Al for CO₂ Methanation