Stable low-temperature dry reforming of methane over mesoporous La2O3-ZrO2 supported Ni catalyst

Sokolov, Sergey; Kondratenko, Evgenii V.; Pohl, Marga‐Martina; Barkschat, Axel; Rodemerck, Uwe

doi:10.1016/j.apcatb.2011.09.035

Cited by 163 publications

(75 citation statements)

References 49 publications

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“…Addition of MgO notably influences surface properties of the catalyst, including thermal stability of Pd oxides, metallic surface dispersion and particle size, metal sintering and carbon resistances. These surface properties could essentially account for the catalytic performance of the catalysts [8,[14][15][16][17][18][19][20][21][22]62,63]. The XRD results identified that MgO mainly exist as amorphous type on catalysts with Mg loading no more than 7 wt%.…”

Section: Effects Of Additive Mgo On Catalytic Performance Of Pd Catalmentioning

confidence: 96%

Role of MgO over γ-Al2O3-supported Pd catalysts for carbon dioxide reforming of methane

Shi

Zhang

2015

Applied Catalysis B: Environmental

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a b s t r a c tA series of Pd/Al 2 O 3 catalysts with varying Mg loading (1, 3, 7 and 10 wt%) were investigated for carbon dioxide reforming of methane. It was observed that the initial catalytic activities and long-term stabilities in terms of both CO 2 and CH 4 conversions increased with increasing Mg content when its loading was below 7 wt%. When Mg content was up to 10 wt%, the initial activity and stability decreased. Moreover, Pd7Mg/Al 2 O 3 displayed the highest H 2 and CO yields. Characterization results conducted on catalysts before and after reaction test demonstrated that MgO mainly presented in amorphous form for catalysts with additive content below 7 wt%; while a fraction of MgO transformed into crystalline form when more additive was introduced to the catalyst. The amorphous MgO significantly enhanced surface metal dispersion, decreased average Pd crystallite size and thus improved resistances against both metal sintering and carbon deposition, which contributed to the enhanced initial activities and long-term stabilities. On the contrary, the crystalline MgO decreased exposed Pd active sites, caused metal sintering and thus led to increased amount of carbon deposition owing to both its negative decoration effect on surface metal and deterioration effect on textural characteristics of support. These factors were responsible for the worse catalytic performance of Pd10Mg/Al 2 O 3 as compared to that of Pd7Mg/Al 2 O 3 .

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Section: Effects Of Additive Mgo On Catalytic Performance Of Pd Catalmentioning

confidence: 96%

Role of MgO over γ-Al2O3-supported Pd catalysts for carbon dioxide reforming of methane

Shi

Zhang

2015

Applied Catalysis B: Environmental

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“…Metal-support interactions are generally present, although at a variable extent in t heterogeneous catalytic systems, implying that different combinations result in different performances in terms of activity and selectivity for a given process [113][114][115]. Among the numerous SiO 2 -based materials used as supports for metal catalysts, mesostructured silica nanoparticles (MSN) have recently found wide application in several processes and reactions, such as in drug delivery [116,117], biomedical imaging [118,119], and catalysis [120,121].…”

Section: Silica-supported Nickelmentioning

confidence: 99%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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CO 2 methanation is a well-known reaction that is of interest as a capture and storage (CCS) process and as a renewable energy storage system based on a power-to-gas conversion process by substitute or synthetic natural gas (SNG) production. Integrating water electrolysis and CO 2 methanation is a highly effective way to store energy produced by renewables sources. The conversion of electricity into methane takes place via two steps: hydrogen is produced by electrolysis and converted to methane by CO 2 methanation. The effectiveness and efficiency of power-to-gas plants strongly depend on the CO 2 methanation process. For this reason, research on CO 2 methanation has intensified over the last 10 years. The rise of active, selective, and stable catalysts is the core of the CO 2 methanation process. Novel, heterogeneous catalysts have been tested and tuned such that the CO 2 methanation process increases their productivity. The present work aims to give a critical overview of CO 2 methanation catalyst production and research carried out in the last 50 years. The fundamentals of reaction mechanism, catalyst deactivation, and catalyst promoters, as well as a discussion of current and future developments in CO 2 methanation, are also included.

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“…Moreover, remarkable conversions of methane and CO2 were observed only above 500 °C [13]. Some studies claimed the catalysts to be active in DRM at very low temperature (400 °C [51] or 450 °C [50]). However, in those studies more beneficial conditions for high catalytic activity compared to this study were applied (lower WHSV, higher content of active sites, or usage of noble metals).…”

Section: Catalyst Performance In the Drm Reactionmentioning

confidence: 99%

Development of Active and Stable Low Nickel Content Catalysts for Dry Reforming of Methane

Armbruster

Atia

et al. 2017

Catalysts

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Methane dry reforming (DRM) was investigated over highly active Ni catalysts with low metal content (2.5 wt %) supported on Mg-Al mixed oxide. The aim was to minimize carbon deposition and metal sites agglomeration on the working catalyst which are known to cause catalyst deactivation. The solids were characterized using N 2 adsorption, X-ray diffraction, temperature-programmed reduction, X-ray photoelectron spectroscopy, and UV-Vis diffuse reflectance spectroscopy. The results showed that MgO-Al 2 O 3 solid solution phases are obtained when calcining Mg-Al hydrotalcite precursor in the temperature range of 550-800 • C. Such phases contribute to the high activity of catalysts with low Ni content even at low temperature (500 • C). Modifying the catalyst preparation with citric acid significantly slows the coking rate and reduces the size of large octahedrally coordinated NiO-like domains, which may easily agglomerate on the surface during DRM. The most effective Ni catalyst shows a stable DRM course over 60 h at high weight hourly space velocity with very low coke deposition. This is a promising result for considering such catalyst systems for further development of an industrial DRM technology.

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Stable low-temperature dry reforming of methane over mesoporous La2O3-ZrO2 supported Ni catalyst

Cited by 163 publications

References 49 publications

Role of MgO over γ-Al2O3-supported Pd catalysts for carbon dioxide reforming of methane

Role of MgO over γ-Al2O3-supported Pd catalysts for carbon dioxide reforming of methane

Supported Catalysts for CO2 Methanation: A Review

Development of Active and Stable Low Nickel Content Catalysts for Dry Reforming of Methane

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