Effect of alkaline earth promoters (MgO, CaO, and BaO) on the activity and coke formation of Ni catalysts supported on nanocrystalline Al2O3 in dry reforming of methane

Alipour, Zahra; Rezaei, Mehran; Meshkani, Fereshteh

doi:10.1016/j.jiec.2013.11.018

Cited by 268 publications

(125 citation statements)

References 16 publications

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“…This is related mainly to their excellent reducibility and Ni enriched surface. This behavior has been also studied elsewhere [20,55], reporting that the coexistence of both Mg and Al in the supports reduces the formation of inactive species (NiO-MgO solid solution, NiAl 2 O 4 spinel), stabilizes the Ni species on the surface, and subsequently enhances the DRM performance.…”

Section: Activity Of Mgal Supported Catalystsmentioning

confidence: 57%

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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Section: Activity Of Mgal Supported Catalystsmentioning

confidence: 57%

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

Armbruster

Atia

et al. 2017

Catalysts

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“…Table. 1 shows the BET surface areas. From the results, It can be seen that all catalysts presented type IV isotherms with a H1-type hysteresis loop and these were typical mesoporous materials [8,15]. The 10Ni/MA-c owned largest BET surface area, pore volume and average pore diameter.…”

Section: Cog Dry Reformingmentioning

confidence: 92%

“…Precious metals having excellent activity and good resistance to carbon deposition such as Ru, Rh, Pd and Pt, but they are expensive and not easy to available. Ni-based catalysts present quite good catalytic activity and low price with wide application in the industry [8]. MgAl 2 O 4 is composite oxide widely used as support in methane dry reforming with acidic and alkaline center which can have good adsorption of methane and carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Effect of Preparation Method on the Performance of 10Ni/MgAl2O4 for Dry Reforming of Coke Oven Gas

Wu¹,

Cheng²,

Wang³

et al. 2016

Proceedings of the 2nd Annual International Conference on Advanced Material Engineering (AME 2016)

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Abstract. MgAl 2 O 4 spinel, as support of the 10Ni/MgAl 2 O 4 catalyst which used for coke oven gas dry reforming, was prepared by sol-gel, coprecipitation and urea hydrolysis method. The catalysts were prepared by impregnation. The MgAl 2 O 4 and 10Ni/MgAl 2 O 4 were both calcined at 800 o C for 5 h and the samples were characterized by BET, XRD, TG-DSC techniques. The MgAl 2 O 4 prepared by coprecipitation showed higher performance in comparison with other two methods which performed high conversion of reactant gas and selectivity of syngas at 700 o C for 24 h.

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“…However, Ni particles could still suffer from sintering or coke formation at high temperature, which drastically affects the catalytic performances. Consequently, researchers have intensified their efforts to solve these problems through several procedures such as incorporation of small amount of rare and alkaline earth metals over nickel based catalysts [5][6][7] or changing supports type and enhancing metal-support interaction [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of pore geometry of mesoporous supports on catalytic performances in methane reforming

et al. 2018

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Abstract-Catalysts prepared using three dimensional SBA-16 silica support (composed of micropores and cage-like mesopores) were tested in the reaction of methane dry reforming, in comparison with 2D hexagonal mesoporous SBA-15 support. The samples were evaluated by N2 sorption and X-Ray diffraction (XRD) for the assessment of their textural and structural properties. The reducibility was characterized by temperature programmed reduction (TPR). The catalytic performances were evaluated in methane dry reforming and spent catalysts (after reaction) were characterized for the evaluation of sintering and coke formation by TPH/MS, XRD and HR-TEM.

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Effect of alkaline earth promoters (MgO, CaO, and BaO) on the activity and coke formation of Ni catalysts supported on nanocrystalline Al2O3 in dry reforming of methane

Cited by 268 publications

References 16 publications

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

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

Effect of Preparation Method on the Performance of 10Ni/MgAl2O4 for Dry Reforming of Coke Oven Gas

Effect of pore geometry of mesoporous supports on catalytic performances in methane reforming

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