Screening of mono and bimetallic catalysts for the dry reforming of methane

Romano, Pedro Nothaft; Filho, José Faustino Souza de Carvalho; Almeida, João Monnerat Araujo Ribeiro de; Sousa-Aguiar, Eduardo Falabella

doi:10.1016/j.cattod.2021.08.006

Cited by 17 publications

(12 citation statements)

References 50 publications

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“…This result is in accordance with the literature, in which the turnover frequencies in DRM were systematically investigated over four Ni/SiO 2 catalysts exhibiting different metal particle sizes. In another study, the initial TOF decreased with increasing metal particle size.…”

Section: Resultsmentioning

confidence: 87%

“…It is also noteworthy that highly dispersed monometallic Ni catalysts displayed stable performance in DRM. , One example is a monometallic Ni/silica catalyst, exhibiting very small nickel particles (Table ), prepared by the impregnation of citric acid-chelated Ni onto silica, followed by calcination/carbonization . On the other hand, Ni supported on hexagonal mesoporous silica HMS when loading of Ni was achieved by self-assembly exhibited a rather stable performance in DRM at 700 °C even if some sintering occurred for this catalyst with the nickel particle size increasing from 4.1 to 11.2 nm …”

Section: Resultsmentioning

confidence: 99%

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Dry Reforming of Methane over Ni–Fe–Al Catalysts Prepared by Solution Combustion Synthesis

Manabayeva

Mäki‐Arvela

Vajglová

et al. 2023

Ind. Eng. Chem. Res.

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Dry reforming of methane (DRM) is a promising method to utilize two greenhouse gases, such as CH4 and CO2, to produce synthesis gas. In the current work, both monometallic Ni and bimetallic Ni–Fe catalysts with different Fe/Ni molar ratios, synthesized by solution combustion synthesis (SCS) in DRM, were investigated using a feed ratio of CH4/CO2/Ar of 1:1:1 at 600–900 °C. The catalysts were characterized by several physicochemical techniques such as X-ray diffraction (XRD), scanning electron microscopy energy-dispersive X-ray (SEM-EDX) spectroscopy, transmission electron microscopy (TEM), CHNS, N2 physisorption, H2-TPR, O2-TPO, NH3-TPD, and thermogravimetric analysis (TGA). One of the highest hydrogen yields of 81% was obtained at 93% conversion of CH4 and 94% conversion of CO2 for the bimetallic 15Ni–5Fe–30Al catalyst, which contained, according to XRD, NiAl2O4 spinel and metallic Ni phases. The spinel phase was decomposed during the reaction, while the Ni3Fe alloy was formed. Catalysts with a higher Fe/Ni ratio exhibited lower conversion and contained an inactive FeAl2O4 spinel. Rather stable yields of CO and H2 were obtained in an experiment with 20 h time-on-stream.

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Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Dry Reforming of Methane over Ni–Fe–Al Catalysts Prepared by Solution Combustion Synthesis

Manabayeva

Mäki‐Arvela

Vajglová

et al. 2023

Ind. Eng. Chem. Res.

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“…To investigate the crystal structure of the modified and bare γ-Al 2 O 3 , the X-ray diffraction is performed. The results are shown in Figure 2, that all catalysts contain γ-Al 2 O 3 (JCPDS:10-0425) [16,17]. There are four different polytypes of zirconia (i.e., monoclinic (m-ZrO 2 ), tetragonal (t-ZrO 2 ), cubic (c-ZrO 2 ), and orthorhombic (o-ZrO 2 )) depend on the temperature and pressure [18].…”

Section: Characterization Of Catalysts As Preparedmentioning

confidence: 97%

The Zr Modified γ-Al2O3 Catalysts for Stable Hydrolytic Decomposition of CF4 at Low Temperature

et al. 2022

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CF4, one of the Perfluorocompounds (PFCs), also known as a greenhouse gas with high global warming potential. In this study, Zr/γ-Al2O3 catalysts were developed for CF4 decomposition. The addition of Zr onto γ-Al2O3 achieves a high CF4 conversion efficiency of 85% at 650 °C and maintain its activity for more than 60 h, which is obviously higher than that of bare γ-Al2O3 (50%). The mechanism involved in CF4 decomposition over the Zr/γ-Al2O3 are clarified that the surface Lewis acidity sites are the main active center for CF4 directly adsorbing and decomposing. The results of NH3-TPD and FT-IR analyses suggest that the amount of Lewis acidity sites on catalyst surface increases significantly after the introduction of Zr, thereby enhancing the activity of catalyst for CF4 decomposition. The results of XPS analyses confirms the electrons transfer from Zr to Al, which contribute to the increase in Lewis acidity sites. The results of this work will help the development of more effective catalysts for CF4 decomposition.

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“…Romano et al 159 reported that the addition of noble metals to Ni catalysts increased the reducibility of the metal, but it had no significant effect on TOF or stability. They prepared Ni, Rh, and Pd supported catalysts and Ni-based alloy catalysts with a few noble metals by the incipient wetness impregnation.…”

Section: Addition Of Noble Metals To Ni Catalystsmentioning

confidence: 99%

“…21, where marked reduction of the reduction temperature was observed by adding Rh or Pd to Ni catalysts. 159 The high hydrogen dissociation capacity of the noble metals might be a factor in the high activity of the catalysts. The addition of a second metal was also found to improve the Ni dispersion in several alloys (Mn–Ni, 97,98 Co–Ni, 116 Rh–Ni, 76 Ir–Ni, 83 Pt–Ni, 84 etc.…”

Section: Summary and Perspectivesmentioning

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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Screening of mono and bimetallic catalysts for the dry reforming of methane

Cited by 17 publications

References 50 publications

Dry Reforming of Methane over Ni–Fe–Al Catalysts Prepared by Solution Combustion Synthesis

Dry Reforming of Methane over Ni–Fe–Al Catalysts Prepared by Solution Combustion Synthesis

The Zr Modified γ-Al2O3 Catalysts for Stable Hydrolytic Decomposition of CF4 at Low Temperature

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

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