Enhanced stability of Ni/SiO2 catalyst for CO2 methanation: Derived from nickel phyllosilicate with strong metal-support interactions

Ye, Runping; Gong, Weibo; Sun, Zhao; Sheng, Qingtao; Shi, Xiufeng; Wang, Tongtong; Yao, Yi; Razink, Joshua J.; Li, Gang; Zhou, Zhangfeng; Adidharma, Hertanto; Tang, Jinke; Fan, Maohong; Yao, Yuan‐Gen

doi:10.1016/j.energy.2019.116059

Cited by 145 publications

(119 citation statements)

References 42 publications

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“…As shown in Figure 1A, the N 2 adsorption‐desorption curves of NiPS−X catalysts with different nickel content belong to type IV adsorption isotherm, and it also shows that the samples have a typical mesoporous structure. The hysteresis ring of NiPS−X catalysts is a typical H3 type in the range of P/Po=0.4–1.0, indicating that NiPS−X catalysts are slit structure formed by the accumulation of loose sheet silicate [17,23–24] . Besides, as shown in Figure 1A, the NiPS−X catalysts exhibit higher nitrogen adsorption‐analysis isotherm with the Ni content increases, indicating that the higher the Ni content in the NiPS−X catalysts, the greater the specific surface area.…”

Section: Resultsmentioning

confidence: 91%

“…Thus, the catalyst with higher nickel loading was not prepared. It is interesting that the Ni loading prepared by the hydrothermal method is higher than that by the ammonia‐evaporation method [17] . Most of the chemicals and regents as well as the preparation process are similar in these two methods.…”

Section: Resultsmentioning

confidence: 99%

“…In our previous work, [17] a Ni/SiO 2 catalyst prepared by ammonia‐evaporation method was reported to show good stability for CO 2 methanation. However, its problem was that some nickel ions would be lost during the preparation process, thus the actual Ni loading of 25.73 wt% was much lower than the theoretical nickel loading of 40.0 wt%.…”

Section: Introductionmentioning

confidence: 99%

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Robust nickel silicate catalysts with high Ni loading for CO₂ methanation

Liao

Chen

et al. 2021

Chemistry An Asian Journal

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CO2 is the main component of greenhouse gases and also an important carbon source. The hydrogenation of CO2 to methane using Ni‐based catalysts can not only alleviate CO2 emissions but also obtain useful fuels. However, Ni‐based catalysts face one major problem of the sintering of Ni nanoparticles in the process of CO2 methanation. Thus, this work has synthesized a series of efficient and robust nickel silicate catalysts (NiPS−X) with different nickel content derived from nickel phyllosilicate by the hydrothermal method. It was found that the Ni loading plays a critical role in the structure and catalytic performance of the NiPS−X catalysts. The catalytic performance gradually increases with the increase of Ni loading. In particular, the highly dispersed NiPS‐1.6 catalyst with a high Ni loading of 34.3 wt% could obtain the CO2 conversion greater than 80%, and the methane selectivity was close to 100% for 48 h at 330 °C and the GHSV of 40,000 mL g−1 h−1. The excellent catalytic property can be assigned to the high dispersion of Ni nanoparticles and the strong interaction between the active component and the carrier, which is derived from a unique layered silicate structure with lots of nickel phyllosilicate and a large number of Lewis acid sites.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Robust nickel silicate catalysts with high Ni loading for CO₂ methanation

Liao

Chen

et al. 2021

Chemistry An Asian Journal

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“…A mesoporous silica molecular sieve with a highly accessible pore system was prepared by Chen et al [17], which proved to be a more active support than amorphous SiO 2 . By using the ammonia evaporation method and colloidal silica as starting material, Ye et al [18] were able to increase the surface area of the SiO 2 support by 140 m 2 g −1 compared to commercial carriers and to decrease the Ni crystal size. Furthermore, Zhu et al [19] prepared a bimodal pore structure with pores in the range of 5 to 50 nm by impregnation of SiO 2 nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Spray-Dried Ni Catalysts with Tailored Properties for CO2 Methanation

et al. 2020

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A catalyst production method that enables the independent tailoring of the structural properties of the catalyst, such as pore size, metal particle size, metal loading or surface area, allows to increase the efficiency of a catalytic process. Such tailoring can help to make the valorization of CO2 into synthetic fuels on Ni catalysts competitive to conventional fossil fuel production. In this work, a new spray-drying method was used to produce Ni catalysts supported on SiO2 and Al2O3 nanoparticles with tunable properties. The influence of the primary particle size of the support, different metal loadings, and heat treatments were applied to investigate the potential to tailor the properties of catalysts. The catalysts were examined with physical and chemical characterization methods, including X-ray diffraction, temperature-programmed reduction, and chemisorption. A temperature-scanning technique was applied to screen the catalysts for CO2 methanation. With the spray-drying method presented here, well-organized porous spherical nanoparticles of highly dispersed NiO nanoparticles supported on silica with tunable properties were produced and characterized. Moreover, the pore size, metal particle size, and metal loading can be controlled independently, which allows to produce catalyst particles with the desired properties. Ni/SiO2 catalysts with surface areas of up to 40 m2 g−1 with Ni crystals in the range of 4 nm were produced, which exhibited a high activity for the CO2 methanation.

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“…Ni metal was widely used as an active species due to its inexpensive and high catalytic activity. [9][10][11][12][13][14][15][16] The Ni metal is the most favorable active species for H 2 dissociation to form atomic H which facilitates the CH 4 formation and results in the enhancement of CO 2 conversion and CH 4 selectivity. 17,18 The catalyst support also displays an important role in the catalytic activity of the catalyst.…”

Section: Introductionmentioning

confidence: 99%