Highly stable ceria-zirconia-yttria supported Ni catalysts for syngas production by CO 2 reforming of methane

Muñoz, Miguel Ángel; Calvino, José J.; Rodrı́guez-Izquierdo, J.M.; Blanco, Ginesa; Arias, Daniel; Pérez-Omil, Jose A.; Hernández‐Garrido, Juan C.; González-Leal, J.M.; Cauqui, M.A.; Yeste, María Pilar

doi:10.1016/j.apsusc.2017.07.210

Cited by 50 publications

(21 citation statements)

References 66 publications

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“…It is instead more related to their surface reducibility and to the oxygen mobility to the Ni interfacial sites. According to the literature, the advantages in the durability of MRD Ni based catalysts supported on Ce-Zr oxides are associated to ceria molar contents higher than 50%, and they are normally attributed to the crystalline cubic structure characteristic of these cerium-rich compositions (Kumar et al, 2007, 2008; Zeng et al, 2013; Nahar and Dupont, 2014; Djinović et al, 2015; Muñoz et al, 2017).…”

Section: Co2 Reforming Of Methanementioning

confidence: 99%

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

2019

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Reducing greenhouse emissions is of vital importance to tackle the climate changes and to decrease the carbon footprint of modern societies. Today there are several technologies that can be applied for this goal and especially there is a growing interest in all the processes dedicated to manage CO 2 emissions. CO 2 can be captured, stored or reused as carbon source to produce chemicals and fuels through catalytic technologies. This study reviews the use of ceria based catalysts in some important CO 2 valorization processes such as the methanation reaction and methane dry-reforming. We analyzed the state of the art with the aim of highlighting the distinctive role of ceria in these reactions. The presence of cerium based oxides generally allows to obtain a strong metal-support interaction with beneficial effects on the dispersion of active metal phases, on the selectivity and durability of the catalysts. Moreover, it introduces different functionalities such as redox and acid-base centers offering versatility of approaches in designing and engineering more powerful formulations for the catalytic valorization of CO 2 to fuels.

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Section: Co2 Reforming Of Methanementioning

confidence: 99%

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

2019

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“…The CO methanation reaction (Eq. 8) may also be considered in the puzzle of the dry reforming of methane reactions network [7,8] Noble metals such as Rh, Ru, Pd, Ir and Pt have been successfully tested in the DRM [9,10] however, their high cost and limited availability makes their use unattractive for industrial applications [11,12].…”

Section: Introductionmentioning

confidence: 99%

Investigating the correlation between deactivation and the carbon deposited on the surface of Ni/Al2O3 and Ni/La2O3-Al2O3 catalysts during the biogas reforming reaction

Charisiou

Tzounis

Sebastián

et al. 2019

Applied Surface Science

158

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catalysts were investigated for the biogas reforming reaction using CH 4 /CO 2 mixtures with minimal dilution. Stability tests at various reaction temperatures were conducted and TGA/DTG, Raman, STEM-HAADF, HR-TEM, XPS techniques were used to characterize the spent samples. Graphitized carbon allotrope structures, carbon nanotubes (CNTs) and amorphous carbon were formed on all samples. Metallic Ni 0 was recorded for all (XPS), whereas a strong peak corresponding to Ni 2 O 3 /NiAl 2 O 4 , was observed for the Ni/Al sample (650-750°C). Stability tests confirm that the Ni/LaAl catalyst deactivates at a more gradual rate and is more active and selective in comparison to the Ni/Al for all temperatures. The Ni/LaAl exhibits good durability in terms of conversion and selectivity, whereas the Ni/Al gradually loses its activity in CH 4 and CO 2 conversion, with a concomitant decrease of the H 2 and CO yield. It can be concluded that doping Al 2 O 3 with La 2 O 3 stabilizes the catalyst by (a) maintaining the Ni 0 phase during the reaction, due to higher dispersion and stronger active phase-support interactions, (b) leading to a less graphitic and more defective type of deposited carbon and (c) facilitating the deposited carbon gasification due to the enhanced CO 2 adsorption on its increased surface basic sites.

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“…In a previous work, we reported on the performance of a Ni/CeO 2 /YSZ (YSZ: yttrium-stabilized zirconia) catalyst for the CO 2 reforming of CH 4 [19]. This formulation exhibited not only high activity but also an outstanding stability under reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Performance of Ni/CeO2/X-ZrO2 (X = Ca, Y) Catalysts in the Aqueous-Phase Reforming of Methanol

et al. 2019

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In this study, we reported on the effect of promoting Ni/ZrO2 catalysts with Ce, Ca (two different loadings), and Y for the aqueous-phase reforming (APR) of methanol. We mainly focused on the effect of the redox properties of ceria and the basicity provided by calcium or yttrium on the activity and selectivity of Ni in this reaction. A systematic characterization of the catalysts was performed using complementary methods such as XRD, XPS, TPR, CO2-TPD, H2 chemisorption, HAADF-STEM, and EDS-STEM. Our results reveal that the improvement in reducibility derived from the incorporation of Ce did not have a positive impact on catalytic behaviour thus contrasting with the results reported in the literature for other Ce-based catalytic compositions. On the contrary, the available Ni-metallic surface and the presence of weak basic sites derived from Ca incorporation seem to play a major role on the catalytic performance for APR of methanol. The best performance was found for a Ce-free catalyst with a molar Ca content of 4%.

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Highly stable ceria-zirconia-yttria supported Ni catalysts for syngas production by CO 2 reforming of methane

Cited by 50 publications

References 66 publications

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

Investigating the correlation between deactivation and the carbon deposited on the surface of Ni/Al2O3 and Ni/La2O3-Al2O3 catalysts during the biogas reforming reaction

Catalytic Performance of Ni/CeO2/X-ZrO2 (X = Ca, Y) Catalysts in the Aqueous-Phase Reforming of Methanol

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