Recent progress in ceria-based catalysts for the dry reforming of methane: A review

Teh, Lee Peng; Setiabudi, Herma Dina; Timmiati, Sharifah Najiha; Aziz, M.A.A.; Annuar, N.H.R.; Ruslan, N. N.

doi:10.1016/j.ces.2021.116606

Cited by 107 publications

(55 citation statements)

References 113 publications

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“…Rh enhances the presence of oxygen vacancies over the reducible support through the spillover effect, while Ni has a minor influence on the support reducibility. This behavior, already observed in previous works [121][122][123][124][125], increases the resistance of the Rh catalyst towards carbon formation, but it was probably responsible for surface modifications during the time on stream, which caused a mild deactivation of 16.7% after 60 h of reaction. Hence, the choice of a Ni 10 wt.% CeZrLa catalyst was the best in terms of stability and activity even when the reforming of biogas was conducted at 7 bar, 500 • C, GHSV of 30,000 h −1 and a S/CH 4 of 3.…”

Section: Metal Oxides As Activity Promoterssupporting

confidence: 63%

Catalytic Upgrading of Clean Biogas to Synthesis Gas

et al. 2022

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Clean biogas, produced by anaerobic digestion of biomasses or organic wastes, is one of the most promising substitutes for natural gas. After its purification, it can be valorized through different reforming processes that convert CH4 and CO2 into synthesis gas (a mixture of CO and H2). However, these processes have many issues related to the harsh conditions of reaction used, the high carbon formation rate and the remarkable endothermicity of the reforming reactions. In this context, the use of the appropriate catalyst is of paramount importance to avoid deactivation, to deal with heat issues and mild reaction conditions and to attain an exploitable syngas composition. The development of a catalyst with high activity and stability can be achieved using different active phases, catalytic supports, promoters, preparation methods and catalyst configurations. In this paper, a review of the recent findings in biogas reforming is presented. The different elements that compose the catalytic system are systematically reviewed with particular attention on the new findings that allow to obtain catalysts with high activity, stability, and resistance towards carbon formation.

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Section: Metal Oxides As Activity Promoterssupporting

confidence: 63%

Catalytic Upgrading of Clean Biogas to Synthesis Gas

et al. 2022

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“…Many review papers of recent years have described DRM. 24–35 Among these papers, Aziz et al 27 and Yentekakis et al 25 respectively produced reviews for bimetallic catalysts in 2020 and 2021. Bian et al 26 presented a review for nickel-based alloys in 2017.…”

Section: Introductionmentioning

confidence: 99%

Effects of alloying for steam or dry reforming of methane: a review of recent studies

Torimoto

Sekine

2022

Catal. Sci. Technol.

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“…CeO 2 is one of the most studied catalyst carriers due to its thermal stability, oxygen vacancies, ability to store and release oxygen, which can reduce carbon deposition, and the ability to effectively disperse metal particles and prevent them from sintering at high temperatures [10]. These properties are responsible for its excellent performance in the oxidation of CO or alcohols [11], CH 4 combustion, CO 2 methanation [12], and DRM [13,14].…”

Section: Introductionmentioning

confidence: 99%

Dry Reforming of Methane on Ni/Nanorod-CeO2 Catalysts Prepared by One-Pot Hydrothermal Synthesis: The Effect of Ni Content on Structure, Activity, and Stability

et al. 2022

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The nanorod morphology of the CeO2 support has been recognized as more beneficial than other morphologies for catalytic activity in the dry reforming of methane. Ni/nanorod-CeO2 catalysts with different Ni contents were prepared by one-pot hydrothermal synthesis. Samples were characterized by X-ray diffraction (XRD), H2-temperature-programmed reduction (H2-TPR), H2-temperature-programmed desorption (H2-TPD), field emission scanning electron microscopy/energy dispersive spectroscopy (FE-SEM/EDS), Brunauer–Emmet–Teller (BET) and Barrett–Joyner–Halenda (BHJ) analysis. The effect of Ni content on the size and the intrinsic strain of ceria was analyzed by the Size–Strain plot and Williamson–Hall plot of XRD data. The average Ni particle size and Ni dispersion were determined by H2-TPD. XRD and H2-TPR analysis revealed a strong Ni–support interaction that limited nickel sintering. The activity for the dry reforming of methane was tested with the stoichiometric mixture CO2:CH4:N2:He = 20:20:20:140, gas hourly space velocity (GHSV) = 300 L g−1 h−1, and temperatures in the range of 545–800 °C. The turnover frequency (TOF) value increased linearly with the average Ni particle size in the range of 5.5–33 nm, suggesting the structure sensitivity of the reaction. Samples with Ni loading of 4–12 wt.% showed high H2/CO selectivity and stability over time on stream, whereas the sample with a Ni loading of 2 wt.% was less selective and underwent rapid deactivation. Only a small amount of nanotubular carbon was observed by FE-SEM after the time-on-stream experiment. Deactivation of the low-Ni-content sample is ascribed to the easier oxidation of the small Ni particles.

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Recent progress in ceria-based catalysts for the dry reforming of methane: A review

Cited by 107 publications

References 113 publications

Catalytic Upgrading of Clean Biogas to Synthesis Gas

Catalytic Upgrading of Clean Biogas to Synthesis Gas

Effects of alloying for steam or dry reforming of methane: a review of recent studies

Dry Reforming of Methane on Ni/Nanorod-CeO2 Catalysts Prepared by One-Pot Hydrothermal Synthesis: The Effect of Ni Content on Structure, Activity, and Stability

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