Hollow @CuMgAl double layered hydrotalcites and mixed oxides with tunable textural and structural properties, and thus enhanced NH3-NOx-SCR activity

Kondratowicz, Tomasz; Horký, Ondřej; Slang, Stanislav; Dubnová, Lada; Gajewska, Marta; Chmielarz, Lucjan; Čapek, Libor

doi:10.1039/d3na00125c

Cited by 7 publications

(1 citation statement)

References 89 publications

(147 reference statements)

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“…Hydrotalcites are also applicable for NO x removal from exhausted gases, for which their layered structures and flexible physicochemical properties grant them good selectivity for NO x elimination. For such reactions, several chemical compositions have been developed based on hydrotalcite structure, which can be found in cited references [110][111][112] . Co-containing Mg-Al hydrotalcite has exhibited remarkable efficiency for NO x removal after calcination at higher temperatures (e.g., 700 °C) because of the formation of spinel phases.…”

Section: Co 2 Upgradingmentioning

confidence: 99%

Hydrotalcites as Versatile Functional Materials for Renewable Feedstock Upgrading to Value-added Chemicals

Asgar Pour,

Omar Sebakhy

2023

Advanced Materials Science and Technology

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Hydrotalcites are inorganic layered materials which have been used in a wide spectrum of applications from catalysis and adsorption to heavy metals immobilization and polymer stabilization. Apart from this, they can act as drug carriers or acid scavengers. More recently, due to the urgent need for developing functional materials required in the production of renewable fuels and chemicals, hydrotalcites have been increasingly noticed as versatile compounds. For instance, they are applicable in biofuel synthesis, biomass upgrading, plastics degradation, hydrogen storage and so forth. In addition, they are cost-efficient materials and thus beneficial for the realization of the above-mentioned applications on the industrial scale. It is noteworthy that for further development of novel hydrotalcites, validation of their performance and their stability are essential. To elucidate these aspects, the major significance of these materials and their capability for application in various catalytic fields are discussed in this survey. Particular focus is given to their most recent utilization in sustainable and green applications.

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Section: Co 2 Upgradingmentioning

confidence: 99%

Hydrotalcites as Versatile Functional Materials for Renewable Feedstock Upgrading to Value-added Chemicals

Asgar Pour,

Omar Sebakhy

2023

Advanced Materials Science and Technology

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Cu‐Based Catalysts for the One‐Pot Condensation–Hydrogenation of Cyclopentanone to Produce Valuable SAF Precursors

Schiaroli,

Scaglione,

Mandioni

et al. 2024

ChemCatChem

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A process combining aldol condensation and hydrogenation of bio‐based cyclopentanone (CPO) in a one‐pot reaction is proposed. Cu‐based bifunctional catalysts obtained from hydrotalcite‐type precursors were found highly active in mild reaction conditions (i.e. 130‐170°C), producing valuable bi‐cyclic (C10) and tri‐cyclic (C15) aliphatic alcohols/ketones with interesting application as sustainable aviation fuel (SAF) precursors with enhanced properties. The presence of surficial strong basic sites active in aldol condensation, together with the formation of highly dispersed copper nanoparticles able to catalyze C=C and C=O hydrogenation (TOF of 0.06‐0.16 s‐1), assured high catalytic efficiency and fine control of the products nature and distribution. From the optimization of both catalysts formulation and reaction conditions it was found that, properly tuning the Cu content, it is possible to drive products distribution towards the production of bi‐cyclic C10 aliphatic alcohol with high selectivity (75% at total CPO conversion, when Cu = 10 wt.%, at 170°C, 1.0 MPa of H2) and short reaction time (4h). The optimized catalyst formulation showed impressive stability over multiple reaction/regeneration cycles, demonstrating the high potential of the proposed catalytic process for future applications in sustainable biofuels production.

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The preparation of bimetallic cerium/copper organic framework-derived CeCuOx/C NH3-SCR catalysts

Yang,

Li,

Zhao

et al. 2024

J Mater Sci

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Hollow @CuMgAl double layered hydrotalcites and mixed oxides with tunable textural and structural properties, and thus enhanced NH₃-NO_x-SCR activity

Abstract: Well-organized, spherical, mesoporous hollow @CuMgAl-LDHs (layered double hydroxides) are prepared by the controlled removal of the SiO2 from SiO2@CuMgAl-LDH core–shell hybrids that in turn are synthesized via a bottom-up strategy.

Cited by 7 publications

References 89 publications

Hydrotalcites as Versatile Functional Materials for Renewable Feedstock Upgrading to Value-added Chemicals

Hydrotalcites as Versatile Functional Materials for Renewable Feedstock Upgrading to Value-added Chemicals

Cu‐Based Catalysts for the One‐Pot Condensation–Hydrogenation of Cyclopentanone to Produce Valuable SAF Precursors

The preparation of bimetallic cerium/copper organic framework-derived CeCuOx/C NH3-SCR catalysts

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