Solid Nanoparticles that Catalyze Biofuel Upgrade Reactions at the Water/Oil Interface

@article{Crossley2010SolidNT,
  title={Solid Nanoparticles that Catalyze Biofuel Upgrade Reactions at the Water/Oil Interface},
  author={Steven P. Crossley and Jimmy A. Faria and Min Shen and Daniel E. Resasco},
  journal={Science},
  year={2010},
  volume={327},
  pages={68 - 72}
}
Metal in the Middle Biphasic reaction mixtures allow the isolation of sensitive products, which can form in one solvent and then shift rapidly into another, protected from side reactions and interfering by-products. However, ensuring that catalysts remain in the proper phase can be challenging, and surfactants added to induce efficient mixing often prove difficult to separate from the product stream. Crossley et al. (p. 68; see the Perspective by Cole-Hamilton) tackle these issues by preparing… 

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References

SHOWING 1-10 OF 29 REFERENCES

Inversion of silica-stabilized emulsions induced by particle concentration.

TLDR
The tendency for particles to behave more hydrophobically at higher concentrations in oil is due to the reduction in the effective silanol content at their surfaces as a result of gel formation via silanol-silanol hydrogen bonds, and a concentration-induced change in particle wettability is advanced.

Influence of Particle Wettability on the Type and Stability of Surfactant-Free Emulsions†

A systematic investigation into the influence of the wettability of spherical, nanometer-sized silica particles on the type and stability of water−toluene emulsions is described. The particles range

Emulsions stabilized by carbon nanotube-silica nanohybrids.

  • M. ShenD. Resasco
  • Chemistry, Engineering
    Langmuir : the ACS journal of surfaces and colloids
  • 2009
TLDR
Emulsions have been stabilized by carbon nanotube-silica nanohybrids and are remarkably stable against coalescence and sedimentation and can be easily separated by filtration or centrifugation, which make them suitable for applications in interfacial catalytic processes in which the catalyst can be quickly recovered after reaction.

Production of Liquid Alkanes by Aqueous-Phase Processing of Biomass-Derived Carbohydrates

Liquid alkanes with the number of carbon atoms ranging from C7 to C15 were selectively produced from biomass-derived carbohydrates by acid-catalyzed dehydration, which was followed by aldol

An Experimental Verification of the Physical Nature of Pt Adsorption onto Alumina

Abstract In the past decade increasing attention has been paid to catalyst preparation, and in particular to the impregnation step. Various models have been employed to describe the uptake of

Silica particle-stabilized emulsions of silicone oil and water: aspects of emulsification.

TLDR
The influence of particle concentration, oil/water ratio, and emulsification time on the relative extents of fragmentation and coalescence during the formation of emulsions, prepared using either batch or continuous methods, has been investigated.

Historical Developments in Hydroprocessing Bio-oils

This paper is a review of the developments in the field of catalytic hydroprocessing of biomass-derived liquefaction conversion products (bio-oil) over the past 25 years. Work has been underway,