Highly selective production of syngas (&gt;99%) in the partial oxidation of methane at 480 °C over Pd/CeO2 catalyst promoted by HCl

Kim, Jeongeun; Ryou, YoungSeok; Kim, Tae Hyeop; Hwang, Gyohyun; Bang, Jungup; Jung, Jaehee; Bang, Yongju; Kim, Do Heui

doi:10.1016/j.apsusc.2021.150043

Cited by 9 publications

(3 citation statements)

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“…CeO 2 is a significant N–type semiconductor material with high electrical conductivity, an excellent oxygen storage/release capacity and strong redox activity. Moreover, CeO 2 –based oxygen storage materials are one of the key materials in a three–way catalyst for automobile exhaust purification [ 6 , 7 ], as well as in water–gas–shift [ 8 , 9 , 10 ], ethanol steam reforming [ 11 , 12 ] and hydrocarbon reforming [ 13 , 14 , 15 ]. In an oxygen–rich environment, CeO 2 can capture ambient oxygen into its own lattice, and release these stored oxygen quickly when the oxygen content of the reaction system is reduced.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Oxygen Storage Capacity of Porous CeO2 by Rare Earth Doping

Gao

Hou

et al. 2023

Molecules

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CeO2 is an important rare earth (RE) oxide and has served as a typical oxygen storage material in practical applications. In the present study, the oxygen storage capacity (OSC) of CeO2 was enhanced by doping with other rare earth ions (RE, RE = Yb, Y, Sm and La). A series of Undoped and RE–doped CeO2 with different doping levels were synthesized using a solvothermal method following a subsequent calcination process, in which just Ce(NO3)3∙6H2O, RE(NO3)3∙nH2O, ethylene glycol and water were used as raw materials. Surprisingly, the Undoped CeO2 was proved to be a porous material with a multilayered special morphology without any additional templates in this work. The lattice parameters of CeO2 were refined by the least–squares method with highly pure NaCl as the internal standard for peak position calibrations, and the solubility limits of RE ions into CeO2 were determined; the amounts of reducible–reoxidizable Cen+ ions were estimated by fitting the Ce 3d core–levels XPS spectra; the non–stoichiometric oxygen vacancy (VO) defects of CeO2 were analyzed qualitatively and quantitatively by O 1s XPS fitting and Raman scattering; and the OSC was quantified by the amount of H2 consumption per gram of CeO2 based on hydrogen temperature programmed reduction (H2–TPR) measurements. The maximum [OSC] of CeO2 appeared at 5 mol.% Yb–, 4 mol.% Y–, 4 mol.% Sm– and 7 mol.% La–doping with the values of 0.444, 0.387, 0.352 and 0.380 mmol H2/g by an increase of 93.04, 68.26, 53.04 and 65.22%. Moreover, the dominant factor for promoting the OSC of RE–doped CeO2 was analyzed.

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Section: Introductionmentioning

confidence: 99%

Enhanced Oxygen Storage Capacity of Porous CeO2 by Rare Earth Doping

Gao

Hou

et al. 2023

Molecules

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“…Hydrogen (H 2 ) gas has been considered as one of the key energy carriers and a key fuel for the 21st century, as it not only shows great potential in a wide variety of industrial applications but can also reduce environmental impacts. − H 2 has been widely used in the chemical process industry, electronics, and food processing. − At present, a large-scale hydrogen production is based on methane steam reforming (MSR) and partial oxidation of methane (POM). In MSR and POM reactions, carbon dioxide (CO 2 ) and carbon monoxide (CO) are simultaneously produced during the processes. − Therefore, these processes are not environmentally friendly, as they need considerable investment in both equipment and energy consumption to separate the CO 2 and CO from the H 2 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcination Temperature on Cu-Modified Ni Catalysts Supported on Mesocellular Silica for Methane Decomposition

et al. 2022

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Catalytic methane decomposition has been considered suitable for the green and sustainable production of high-purity H 2 to help reduce greenhouse gas emissions. This research developed a copper-modified nickel-supported mesocellular silica NiCu/MS( x ) catalyst synthesized at different calcination temperatures to improve the activity and stability in the CH 4 decomposition reaction at 600 °C. Ni and Cu metals were loaded on a mesocellular silica (MS) support using a co-impregnation method and calcined at different temperatures (500, 600, 700, and 800 °C). The NiCu/MS(600) catalyst not only had the highest H 2 yield (32.78%), which was 1.47–3.87 times higher than those of the other NiCu/MS( x ) catalysts, but also showed better stability during the reaction. Calcination at 600 °C helps improve the active nickel dispersion, the reducibility of the NiCu catalyst, and the interaction of the NiCu–MS support, leading to the formation of fishbone and platelet carbon nanofibers via a tip-growth mechanism, resulting in the NiCu metals remaining active during the reaction.

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“…Noble metal catalysts such as Rh, Pd, Ru, Ir are highly active catalysts for producing hydrogen [21][22][23][24][25] and syngas [26][27][28][29][30] by activating methane in the POM reaction, but they cost a lot and small amount. Therefore, There is a need to develop a catalyst of POM for hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

The Partial Oxidation of Methane to Hydrogen over M(1)-Ni(5)/AlCeO<sub>3</sub>(M=Ce, La, Y) Catalysts

Seo¹

2022

AJCHE

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The catalytic yields of partial oxidation of methane (POM) to hydrogen over M(1)-Ni(5)/Al 2 O 3 (M=, Ce, La, Y) catalysts were investigated using a fixed bed flow reactor under atmospheric pressure to solve the global warming problem and clean energy demand. Catalyst activity is evaluated by performing the reaction of POM to hydrogen, and active sites of the catalyst are verified by instrumental analysis. The catalysts were characterized by XPS, XRD, FESEM, EDS, FETEM. The crystal phase behavior of reduced La(1)-Ni(5)/AlCeO 3 catalysts before and after the reaction were studied by XRD analysis. The crystalline phase of Ni and La on La(1)-Ni(5)/AlCeO 3 reduced before reaction was not obserbed due to uniform distribution of nanoparticles. FESEM and EDS analyses show that nanoparticles of Ni, La and Ce are uniformly distributed on the catalyst surface. In addition, TEM images and EDS mapping of La, Ni, Ce, O, and Al for a reduced La(1)-Ni(5)/AlCeO 3 catalyst before reaction show that the elements are well distributed. When 1 wt% of La was added to Ni(5)/AlCeO 3 catalyst, XPS results showed that O -, O vacancy , and O 2 species, Ni 2 p 3/2 , and Ce3d 5/2 increased 1.4, 52.7, 6.3% on the La(1)-Ni(5)/ AlCeO 3 catalyst, respectively. The yield of hydrogen on the La(1)-Ni(5)/ AlCeO 3 catalyst was 89.1%, which was much better than that of M(1)-Ni(5)/Al 2 O 3 (M=Ce, Y) catalysts. As Ce 4+ /Ce 3+ ions in CeO 2 produced by the reaction of AlCeO 3 with oxygen were substitute to La 3+ , Ni 2+ , it made oxygen vacancies in the lattice and further improved the hydrogen yield by increasing the dispersion of Ni atoms with strong metal-support interaction (SMSI) effect.

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Highly selective production of syngas (>99%) in the partial oxidation of methane at 480 °C over Pd/CeO2 catalyst promoted by HCl

Cited by 9 publications

References 50 publications

Enhanced Oxygen Storage Capacity of Porous CeO2 by Rare Earth Doping

Enhanced Oxygen Storage Capacity of Porous CeO2 by Rare Earth Doping

Effect of Calcination Temperature on Cu-Modified Ni Catalysts Supported on Mesocellular Silica for Methane Decomposition

The Partial Oxidation of Methane to Hydrogen over M(1)-Ni(5)/AlCeO<sub>3</sub>(M=Ce, La, Y) Catalysts

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Highly selective production of syngas (>99%) in the partial oxidation of methane at 480 °C over Pd/CeO2 catalyst promoted by HCl

Cited by 9 publications

References 50 publications

Enhanced Oxygen Storage Capacity of Porous CeO2 by Rare Earth Doping

Enhanced Oxygen Storage Capacity of Porous CeO2 by Rare Earth Doping

Effect of Calcination Temperature on Cu-Modified Ni Catalysts Supported on Mesocellular Silica for Methane Decomposition

The Partial Oxidation of Methane to Hydrogen over M(1)-Ni(5)/AlCeO&lt;sub&gt;3&lt;/sub&gt;(M=Ce, La, Y) Catalysts

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The Partial Oxidation of Methane to Hydrogen over M(1)-Ni(5)/AlCeO<sub>3</sub>(M=Ce, La, Y) Catalysts