A study of ethanol conversion over zinc aluminate catalyst

Garbarino, Gabriella; Riani, Paola; García, Maria Villa; Finocchio, Elisabetta; Escribano, Vicente Sánchez; Busca, Guido

doi:10.1007/s11144-018-1395-z

Cited by 16 publications

(5 citation statements)

References 42 publications

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“…As already cited, over several catalysts acetaldehyde production by dehydrogenation competes with dehydration reactions, at high temperature. This is found, e.g., in the case of transition metal containing oxides like ZnAl 2 O 4 [29] and Zn-Zr mixed oxides, TiO 2 , ZrO 2 , Nb 2 O 5 , as well as on basic catalysts, such as calcined hydrotalcite [16] and "basic" Y zeolites [30].…”

Section: Ethanol To Acetaldehyde By Dehydrogenationmentioning

confidence: 86%

Heterogeneous Catalysis in (Bio)Ethanol Conversion to Chemicals and Fuels: Thermodynamics, Catalysis, Reaction Paths, Mechanisms and Product Selectivities

et al. 2020

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In gas/solid conditions, different chemicals, such as diethylether, ethylene, butadiene, higher hydrocarbons, acetaldehyde, acetone and hydrogen, can be produced from ethanol with heterogeneous catalytic processes. The focus of this paper is the interplay of different reaction paths, which depend on thermodynamic factors as well as on kinetic factors, thus mainly from catalyst functionalities and reaction temperatures. Strategies for selectivity improvements in heterogeneously catalyzed processes converting (bio)ethanol into renewable chemicals and biofuels are also considered.

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Section: Ethanol To Acetaldehyde By Dehydrogenationmentioning

confidence: 86%

Heterogeneous Catalysis in (Bio)Ethanol Conversion to Chemicals and Fuels: Thermodynamics, Catalysis, Reaction Paths, Mechanisms and Product Selectivities

et al. 2020

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“…Hanukovich et al 10 observe that Cu surface over ZrO2, TiO2, AlZrO2 supports becomes poisoned with reactive intermediates, pointing out the need to choose support with moderate Lewis acidity, to avoid the formation of side products that trigger fouling. Copper-based catalysts supported on Al2O3, ZnAl2O4, MgAl2O4, have also been investigated [11][12][13][14][15] . These catalysts are active and selective to acetaldehyde (>90%) also at high conversion, but a progressive deactivation appears inevitable, owing to an interplay between Cu sintering and carbon deposition 16 .…”

Section: Introductionmentioning

confidence: 99%

Ethanol dehydrogenation to acetaldehyde with mesoporous Cu-SiO2 catalysts prepared by aerosol-assisted sol–gel

Pampararo

Garbarino

Riani

et al. 2023

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

Ethanol dehydrogenation to acetaldehyde with mesoporous Cu-SiO2 catalysts prepared by aerosol-assisted sol-gel

Pampararo

Garbarino

Riani

et al. 2023

Preprint

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Copper based catalysts are central for carrying dehydrogenation reactions. However, these materials are prone to deactivation by sintering and coke deposition. Irreversible sintering occurring during reaction (under the effect of temperature) is known to decrease both activity and selectivity, where the unwanted dehydration activity of the support might also play an important role. From this perspective, the quite unreactive silica supports may be attractive. However, using classical catalyst preparation methods (e.g. impregnation), it is a challenge to obtain a stable and homogeneous dispersion of Cu over SiO2 owing to the weak support-active phase interactions. Taking a sidestep, aerosol-assisted sol-gel is a promising alternative for the facile preparation of mesostructured metallosilicates with high metal dispersion. Here we report, for the first time, Cu-SiO2 made by the aerosol-assisted sol-gel method and exploited in the ethanol non-oxidative dehydrogenation to acetaldehyde. These catalysts are compared with a series of catalysts made by impregnation to investigate, through a thorough characterization survey, the effect of the synthesis procedure as well as the effect of Cu loading. We show that aerosol-made catalysts do not suffer heavy sintering, reach high ethanol conversions with acetaldehyde selectivity above 75%, and only slowly deactivate upon time due to a (reversible) coking phenomenon.

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A study of ethanol conversion over zinc aluminate catalyst

Cited by 16 publications

References 42 publications

Heterogeneous Catalysis in (Bio)Ethanol Conversion to Chemicals and Fuels: Thermodynamics, Catalysis, Reaction Paths, Mechanisms and Product Selectivities

Heterogeneous Catalysis in (Bio)Ethanol Conversion to Chemicals and Fuels: Thermodynamics, Catalysis, Reaction Paths, Mechanisms and Product Selectivities

Ethanol dehydrogenation to acetaldehyde with mesoporous Cu-SiO2 catalysts prepared by aerosol-assisted sol–gel

Ethanol dehydrogenation to acetaldehyde with mesoporous Cu-SiO2 catalysts prepared by aerosol-assisted sol-gel

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