Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content

Dieuzeide, María Laura; Jobbágy, Matı́as; Amadeo, Norma

doi:10.1016/j.cattod.2013.02.015

Cited by 69 publications

(31 citation statements)

References 26 publications

(45 reference statements)

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“…In general, the strength of basic sites may be determined from CO 2 desorption temperatures. The higher desorption temperature, the stronger basicity . A broad peak showed in the CO 2 ‐TPD profile for the Ni‐MOF at a temperature lower than 300°C proved that the Ni‐MOF contained some weak basic sites (Supporting Information Figure S2), indicating that there were some uncoordinated nitrogen atoms of DABCO on the surface of the MOF.…”

Section: Resultsmentioning

confidence: 97%

Selective hydrogenation of nitriles to imines over a multifunctional heterogeneous Pt catalyst

Long

Yin

et al. 2014

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com)Imines and their derivatives are versatile synthetic intermediates for the industrial preparation of both bulk and fine chemicals and for pharmaceuticals, but preparing these compounds efficiently through direct hydrogenation of nitriles are hindered by overhydrogenation to secondary amines. Here we report a highly efficient multifunctional catalyst system for selective hydrogenation coupling of nitriles to secondary imines using a heterogeneous Pt catalyst that was deposited on a nickel-based metal-organic framework (MOF) containing DABCO. The catalyst showed excellent synergy in promoting the hydrogenation of a variety of nitriles, giving significantly improved activity and selectivity (up to >99% yield) even under atmospheric pressure of H 2 . It is suggested that the Lewis base (DABCO) sites on the Ni-MOF inhibit further hydrogenation of the imines. The influence of H 2 pressure, reactant concentration, stirring speed, and reaction temperature was investigated. The kinetics and mechanism of hydrogenation of benzonitrile (BN) by the Pt/Ni-MOF catalyst has been studied. The reaction showed a first-order dependence on both BN concentration and H 2 pressure. A kinetic model was proposed based on the mechanism of nitriles hydrogenation and compared with experimental observations.

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Section: Resultsmentioning

confidence: 97%

Selective hydrogenation of nitriles to imines over a multifunctional heterogeneous Pt catalyst

Long

Yin

et al. 2014

AIChE Journal

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“…It has been found that the use of low amounts of Mg(II) promoter leads to higher metal dispersion, thus favoring glycerol conversion into gaseous products, while higher loadings result in lower coke deposition [20]. Other basic promoters such as Mo [66,[79][80][81][82][83] and Ca [66,69,79] have also been reported to enhance the GSR performance of non-promoted catalyst, for the same reasons previously mentioned for basic modifiers.…”

Section: Effect Of the Addition Of A Promoter On The Catalytic Performentioning

confidence: 90%

“…The addition of basic Mg(II) to Ni/Al2O3 catalysts has been reported to prevent carbon formation by favoring both the adsorption of H2O, O2, CO2 or -OH fragments and the spillover of such fragments from the support to the metal particles [20,77,78], thus facilitating carbon gasification. Moreover, the use Mg(II) promoter in Ni/Al2O3 materials enhances the stability of Ni against sintering, since it decreases the degree of interaction of Ni with alumina through intercalation between the nickel active phase and alumina.…”

Section: Effect Of the Addition Of A Promoter On The Catalytic Performentioning

confidence: 99%

Challenges and strategies for optimization of glycerol steam reforming process

Silva

Soria

Madeira

2015

Renewable and Sustainable Energy Reviews

203

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The steam reforming of the main biodiesel by-product, glycerol, has been catching up the interest of the scientific community in the last years. The use of glycerol for hydrogen production is an advantageous option not only because glycerol is renewable but also because it's use would lead to the decrease of the price of biodiesel, thus making it more competitive. Consequently, the use of biodiesel at large scale would significantly reduce CO2 emissions comparatively to fossil fuels. Moreover, hydrogen itself is seen as a very attractive clean fuel for transportation purposes.Therefore, the industrialization of the glycerol steam reforming (GSR) process would have a tremendous global environmental impact. In the last years, intensive research regarding GSR thermodynamics, catalysts, reaction mechanisms and kinetics, and innovative reactor configurations (sorption enhanced reactors (SERs) and membrane reactors (MRs)) has been done, aiming for improving the process effectiveness. In this review, the main challenges and strategies adopted for optimization of GSR process are addressed, namely the GSR thermodynamic aspects, the last developments on catalysis and kinetics, as well as the last advances on GSR performed in SERs and MRs.

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“…Most Ni‐based catalysts are Ni on alumina (Al 2 O 3 ), ceria (CeO 2 ), and/or yttria‐stabilized‐zirconia (YSZ) . Cobalt (Co) and Ni/Co catalysts are employed for GSR, giving results similar to Ni catalysts .…”

Section: Generic Catalytic Technologiesmentioning

confidence: 99%

“…Many catalytic formulations are active for liquid HC reforming. However, very few among the reported catalysts are stable for more than 15 h. Doping agents, such as magnesium and calcium, can improve the resistance of Ni catalysts. A new patent pending catalytic formulation has been proposed and tested with success on commercial diesel SR.…”

Section: Generic Catalytic Technologiesmentioning

confidence: 99%

Review of catalytic syngas production through steam or dry reforming and partial oxidation of studied liquid compounds

Abatzoglou

Fauteux‐Lefebvre

2015

WIREs Energy & Environment

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Although natural gas is the main feedstock for the production of hydrogen and syngas, liquid hydrocarbons and oxygenated compounds are of interest for reasons associated with their local availability and their easiness to be stored and transported. This review focuses on steam, dry, and partial oxidation of liquid feedstock. The vast research work published in these fields does not allow for a full coverage of the entire literature. Instead, the authors present from both scientific and technical stand points the knowledge which seems more promising toward eventual improvements of commercial units and utilization of new catalytic formulations. Since traditional steam reforming is relatively very well covered by other reviews, this review has mainly focused on the relatively recent works on glycerol, a biodiesel production by-product, and the widely available and distributed commercial diesel/biodiesel. New promising catalytic formulations are proposed and are actually under testing for eventual commercial use. Nevertheless these catalysts might be eventually efficient for gaseous (e.g., CH 4 ) hydrocarbons conversion to syngas. Dry and partial oxidation has also been reviewed both globally and in an incremental way. All liquid feedstock tested are reported. Finally, this review tries to bridge the gap between fundamental and factual research in this field. Both are important but the interpretation of the results remains a strong function of each paper's main focus. This review does not pretend that this gap is fully bridged but it has the ambition to help the researchers as well as the practitioners in this area to synthesize the existing knowledge.

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Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content

Cited by 69 publications

References 26 publications

Selective hydrogenation of nitriles to imines over a multifunctional heterogeneous Pt catalyst

Selective hydrogenation of nitriles to imines over a multifunctional heterogeneous Pt catalyst

Challenges and strategies for optimization of glycerol steam reforming process

Review of catalytic syngas production through steam or dry reforming and partial oxidation of studied liquid compounds

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