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Colloids

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...

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Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

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Multiphase Microreactors Based on Liquid-Liquid and Gas-Liquid Dispersions Stabilized by Colloidal Catalytic

Dmytro Dedovets^1,2, Qingyuan Li¹, Loïc Leclercq³

¹Eco-Efficient Products and Processes Laboratory (E2P2L), UMI 3464 CNRS-Solvay, 3966 Jin Du Road, Xin Zhuang Ind Zone, 201108, Shanghai, China.

Angewandte Chemie (International Ed. in English)

|September 16, 2021

Summary

This summary is machine-generated.

Pickering emulsions, stabilized by particles, offer sustainable microreactors for eco-efficient reactions using biobased reagents. This review covers their progress, challenges, and advanced applications in multiphase systems.

Keywords:

dispersions interfacial catalysis microreactors multiphase reactions sustainable chemistry

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Area of Science:

Colloid and Surface Science
Chemical Engineering
Green Chemistry

Background:

Pickering emulsions, foams, bubbles, and marbles are colloidal dispersions stabilized by solid particles.
These systems offer unique platforms for developing sustainable multiphase microreactors.
Traditional multiphase reactors face challenges in efficiency and environmental impact.

Purpose of the Study:

To provide a systematic overview of recent advancements in particle-stabilized dispersions as microreactors.
To highlight their application in engineering eco-efficient reactions, particularly with biobased reagents.
To discuss strategies for stabilizing/destabilizing these systems for product recovery and catalyst recycling.

Main Methods:

Review of recent scientific literature on Pickering dispersions in microreactor applications.
Analysis of physicochemical parameters governing dispersion stability.
Exploration of advanced concepts like cascade reactions and computational methods.

Main Results:

Particle-stabilized dispersions enable novel liquid-liquid-solid and gas-liquid-solid microreactor designs.
These systems demonstrate potential for enhanced sustainability in multiphase reactions.
Progress has been made in controlling dispersion stability for practical applications.

Conclusions:

Pickering dispersions represent a promising avenue for developing sustainable and eco-efficient microreactors.
Further research into controlling stability and integrating advanced reaction schemes is crucial.
These systems are key to reengineering multiphase reactors for a greener future.