CO2 methanation over Co Ni bimetal-doped ordered mesoporous Al2O3 catalysts with enhanced low-temperature activities

Xu, Leilei; Lian, Xinbo; Chen, Mindong; Cui, Yan; Wang, Fagen; Li, Wenjing; Huang, Bingbo

doi:10.1016/j.ijhydene.2018.07.106

Cited by 92 publications

(43 citation statements)

References 48 publications

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“…Xu et al successfully synthesized NiO-OMA [149], OMA- x Co y Ni [156], OMA-10Ni x Ca [157], OMA-10Ni x Mg [158], and OMA-10Ni3Re (Re = La, Ce, Sm and Pr) [159], which would be used in the CO 2 methanation reaction. The conversion of CO 2 on the OMA-10Ni and OMA-10Ni5Mg catalysts is also much higher than the 10Ni/Al 2 O 3 catalyst, especially in the low temperature.…”

Section: Catalytic Application Of Mesoporous Metal Oxides In Catalmentioning

confidence: 99%

Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

Cui

Lian

et al. 2019

Materials

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In the past two decades, great progress has been made in the aspects of fabrication and application of ordered mesoporous metal oxides. Ordered mesoporous metal oxides have attracted more and more attention due to their large surface areas and pore volumes, unblocked pore structure, and good thermal stabilities. Compared with non-porous metal oxides, the most prominent feature is their ability to interact with molecules not only on their outer surface but also on the large internal surfaces of the material, providing more accessible active sites for the reactants. This review carefully describes the characteristics, classification and synthesis of ordered mesoporous metal oxides in detail. Besides, it also summarizes the catalytic application of ordered mesoporous metal oxides in the field of carbon dioxide conversion and resource utilization, which provides prospective viewpoints to reduce the emission of greenhouse gas and the inhibition of global warming. Although the scope of current review is mainly limited to the ordered mesoporous metal oxides and their application in the field of CO2 catalytic conversion via heterogeneous catalysis processes, we believe that it will provide new insights and viewpoints to the further development of heterogeneous catalytic materials.

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Section: Catalytic Application Of Mesoporous Metal Oxides In Catalmentioning

confidence: 99%

Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

Cui

Lian

et al. 2019

Materials

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“…Furthermore, the reductivity and particle size of the CuO could be promoted, which is beneficial to the formation of the active sites for CO oxidation [29]. Herein, Ce0.8Zr0.2O2 solid solution with a mesoporous nanocrystalline structure was successfully synthesized by evaporation-induced self-assembly (EISA) [30]. A series of CuO-based catalysts doped with different transition metal oxides and rare earth metal oxides was prepared with mesoporous Ce0.8Zr0.2O2 solid solution support.…”

Section: Xrd Analysismentioning

confidence: 99%

“…The mesoporous Ce 0.8 Zr 0.2 O 2 solid solution was synthesized by the evaporation-induced self-assembly (EISA) strategy [30]. In a specific synthesis process, 1.0 g of P123 (M av = 5800, EO 20 PO 70 EO 20 , Aladdin) was dissolved in 20.0 mL anhydrous ethanol (C 2 H 5 OH, Sinopharm Chemical Reagent Co., Ltd., China) and stirred vigorously at room temperature to dissolve.…”

Section: Catalyst Preparationmentioning

confidence: 99%

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CO Oxidation over Metal Oxide (La2O3, Fe2O3, PrO2, Sm2O3, and MnO2) Doped CuO-Based Catalysts Supported on Mesoporous Ce0.8Zr0.2O2 with Intensified Low-Temperature Activity

Cui

Chen

et al. 2019

Catalysts

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CuO-based catalysts are usually used for CO oxidation owing to their low cost and excellent catalytic activities. In this study, a series of metal oxide (La2O3, Fe2O3, PrO2, Sm2O3, and MnO2)-doped CuO-based catalysts with mesoporous Ce0.8Zr0.2O2 support were simply prepared by the incipient impregnation method and used directly as catalysts for CO catalytic oxidation. These mesoporous catalysts were systematically characterized by X-ray powder diffraction (XRD), N2 physisorption, transmission electron microscopy (TEM), energy-dispersed spectroscopy (EDS) mapping, X-ray photoelectron spectroscopy (XPS), and H2 temperature programmed reduction (H2-TPR). It was found that the CuO and the dopants were highly dispersed among the mesoporous framework via the incipient impregnation method, and the strong metal framework interaction had been formed. The effects of the types of the dopants and the loading amounts of the dopants on the low-temperature catalytic performances were carefully studied. It was concluded that doped transition metal oxides could regulate the oxygen mobility and reduction ability of catalysts, further improving the catalytic activity. It was also found that the high dispersion of rare earth metal oxides (PrO2, Sm2O3) was able to prevent the thermal sintering and aggregation of CuO-based catalysts during the process of calcination. In addition, their presence also evidently improved the reducibility and significantly reduced the particle size of the CuO active sites for CO oxidation. The results demonstrated that the 15CuO-3Fe2O3/M-Ce80Zr20 catalyst with 3 wt. % of Fe2O3 showed the best low-temperature catalytic activity toward CO oxidation. Overall, the present Fe2O3-doped CuO-based catalysts with mesoporous nanocrystalline Ce0.8Zr0.2O2 solid solution as support were considered a promising series of catalysts for low-temperature CO oxidation.

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“…Until now, all commercial methanation catalysts for SNG production have been Ni-based catalysts due to their high performance and low cost [6][7][8][9][10][11][12][13][14][15][16][17][18]. Nevertheless, the major weaknesses of nickel catalysts include agglomeration of Ni nanoparticles, formation of carbon deposits at higher temperatures, and poor activity at low temperatures (250 • C) for the complete methanation of syngas [19][20][21][22][23][24][25][26][27][28][29][30][31]. The increase in low temperature performance of the Ni catalysts in syngas methanation is critical.…”

Section: Introductionmentioning

confidence: 99%

Highly Dispersed Ni Nanocatalysts Derived from NiMnAl-Hydrotalcites as High-Performing Catalyst for Low-Temperature Syngas Methanation

Lü

Zhuang

et al. 2019

Catalysts

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Increasing the low-temperature performance of nickel-based catalysts in syngas methanation is critical but very challenging, because at low temperatures there is high concentration of CO on the catalyst surface, causing formation of nickel carbonyl with metallic Ni and further catalyst deactivation. Herein, we have prepared highly dispersed Ni nanocatalysts by in situ reduction of NiMnAl-layered double hydroxides (NiMnAl-LDHs) and applied them to syngas methanation. The synthesized Ni nanocatalysts maintained the nanosheet structure of the LDHs, in which Ni particles were decorated with MnOy species and embedded in the AlOx nanosheets. It was observed that the Ni nanocatalysts exhibited markedly better low-temperature performance than commercial catalysts in the syngas methanation. At 250 °C, 3.0 MPa and a high weight hourly space velocity (WHSV) of 30,000 mL·g−1·h−1, both the CO conversion and the CH4 selectivity reached 100% over the former, while those over the commercial catalyst were only 14% and 76%, respectively. Furthermore, this NiMnAl catalyst exhibited strong anti-carbon and anti-sintering properties at high temperatures. The enhanced low-temperature performance and high-temperature stability originated from the promotion effect of MnOy and the embedding effect of AlOx in the catalyst.

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CO2 methanation over Co Ni bimetal-doped ordered mesoporous Al2O3 catalysts with enhanced low-temperature activities

Cited by 92 publications

References 48 publications

Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

Designing and Fabricating Ordered Mesoporous Metal Oxides for CO2 Catalytic Conversion: A Review and Prospect

CO Oxidation over Metal Oxide (La2O3, Fe2O3, PrO2, Sm2O3, and MnO2) Doped CuO-Based Catalysts Supported on Mesoporous Ce0.8Zr0.2O2 with Intensified Low-Temperature Activity

Highly Dispersed Ni Nanocatalysts Derived from NiMnAl-Hydrotalcites as High-Performing Catalyst for Low-Temperature Syngas Methanation

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