Syngas production from dry methane reforming over yttrium-promoted nickel-KIT-6 catalysts

Świrk, Katarzyna; Gálvez, María Elena; Motak, Monika; Grzybek, Teresa; Rønning, Magnus; Costa, Patrick Da

doi:10.1016/j.ijhydene.2018.02.164

Cited by 70 publications

(44 citation statements)

References 43 publications

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“…In our previous study we showed that Y (0.6-1.5 wt.%) increased specific surface area of Ni-DLHs, led to smaller Ni crystallites and enhanced dispersion of active sites as compared to the unpromoted catalyst [4]. Similar positive effects were reported in other Y-promoted materials tested in DRM [18,[23][24][25][26]. Moreover, Zr-modified hydrotalcites doped with yttrium (0.2-0.6 wt.%) showed good catalytic performance [18].…”

Section: Introductionsupporting

confidence: 70%

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Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

et al. 2019

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Ce- and Y-promoted double-layered hydroxides were synthesized and tested in dry reforming of methane (CH4/CO2 = 1/1). The characterization of the catalysts was performed using X-ray fluorescence (XRF), X-ray diffraction (XRD), N2 sorption, temperature-programmed reduction in H2 (TPR-H2), temperature-programmed desorption of CO2 (TPD-CO2), H2 chemisorption, thermogravimetric analysis coupled by mass spectrometry (TGA/MS), Raman, and high-resolution transmission electron microscopy (HRTEM). The promotion with cerium influences textural properties, improves the Ni dispersion, decreases the number of total basic sites, and increases the reduction temperature of nickel species. After promotion with yttrium, the increase in basicity is not directly correlated with the increasing Y loading on the contrary of Ni dispersion. Dry reforming of methane (DRM) was performed as a function of temperature and in isothermal conditions at 700 °C for 5 h. For catalytic tests, a slight increase of the activity is observed for both Y and Ce doped catalysts. This improvement can of course be explained by Ni dispersion, which was found higher for both Y and Ce promoted catalysts. During DRM, the H2/CO ratio was found below unity, which can be explained by side reactions occurrence. These side reactions are linked with the increase of CO2 conversion and led to carbon deposition. By HRTEM, only multi-walled and helical-shaped carbon nanotubes were identified on Y and Ce promoted catalysts. Finally, from Raman spectroscopy, it was found that on Y and Ce promoted catalysts, the formed C is less graphitic as compared to only Ce-based catalyst.

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Section: Introductionsupporting

confidence: 70%

“…Yttrium has also been reported as a promising promoter, especially in dry reforming of methane [4,18,[23][24][25]. In our previous study we showed that Y (0.6-1.5 wt.%) increased specific surface area of Ni-DLHs, led to smaller Ni crystallites and enhanced dispersion of active sites as compared to the unpromoted catalyst [4].…”

Section: Introductionmentioning

confidence: 93%

Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

et al. 2019

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“…Furthermore, the addition of yttrium can limit the sintering of nickel during the reaction. On the other hand, It is well known that the large nickel particle size may be favored for selective reactions that lead to carbon deposition [18,19]. As a consequence, NiO-ZrO m -YO n can limit the carbon deposition.…”

Section: Basicity Of Y-doped and Y-free Nio-zro M Catalystsmentioning

confidence: 99%

“…be favored for selective reactions that lead to carbon deposition [18,19]. As a consequence, NiO-ZrOm-YOn can limit the carbon deposition.…”

Section: Nickel Particle Size and Crystallized Phases Of Y-doped And mentioning

confidence: 99%

“…Therefore, bigger particles of Ni 0 are present on the NiO-ZrO m catalyst. These large nickel particles may be favored for selective reactions that tend to form carbon deposition [18,19], thereby resulting in the formation of carbon deposition. Thus, a lot of carbon deposition can be observed on the NiO-ZrO m catalyst in the form of a carbon nanotube ( Figure 6A), and no carbon deposition is observed on the NiO-ZrO m -YO n catalyst ( Figure 6C),which indicates that no or little carbon formes on the NiO-ZrO m -YO n catalyst.…”

Section: On the Study Of The Morphology Of Carbon Studied By Temmentioning

confidence: 99%

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Highly Carbon-Resistant Y Doped NiO–ZrOm Catalysts for Dry Reforming of Methane

Wang

et al. 2019

Catalysts

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Yttrium-doped NiO-ZrO m catalyst was found to be novel for carbon resistance in the CO 2 reforming of methane. Yttrium-free and -doped NiO-ZrO m catalysts were prepared by a one-step urea hydrolysis method and characterized by Brunauer-Emmett-Teller (BET), TPR-H 2 , CO 2 -TPD, XRD, TEM and XPS. Yttrium-doped NiO-ZrO m catalyst resulted in higher interaction between Ni and ZrO m , higher distribution of weak and medium basic sites, and smaller Ni crystallite size, as compared to the Y-free NiO-ZrO m catalyst after reaction. The DRM catalytic tests were conducted at 700 • C for 8 h, leading to a significant decrease of activity and selectivity for the yttrium-doped NiO-ZrO m catalyst. The carbon deposition after the DRM reaction on yttrium-doped NiO-ZrO m catalyst was lower than on yttrium-free NiO-ZrO m catalyst, which indicated that yttrium could promote the inhibition of carbon deposition during the DRM process.

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Recent Progress of Catalyst Design for Carbon Dioxide Reforming of Methane to Syngas

Liu

2020

Energy Tech

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Syngas production from dry methane reforming over yttrium-promoted nickel-KIT-6 catalysts

Cited by 70 publications

References 43 publications

Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

Highly Carbon-Resistant Y Doped NiO–ZrOm Catalysts for Dry Reforming of Methane

Recent Progress of Catalyst Design for Carbon Dioxide Reforming of Methane to Syngas

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