Microfluidic supercritical applications: Solvent extraction, nanoparticle synthesis, and chemical reaction

Area of Science:

• Green Chemistry
• Microfluidics
• Materials Science

Background:

• Supercritical carbon dioxide (scCO2) is a non-toxic, non-flammable, and abundant green solvent alternative to hazardous organic solvents.
• scCO2 finds applications in food, pharmaceuticals, chromatography, and catalysis.
• Microfluidic systems offer advantages over conventional macro-scale reactors for scCO2 applications.

Purpose of the Study:

• To review microfluidic investigations involving supercritical carbon dioxide.
• To focus on three primary applications: solvent extraction, nanoparticle synthesis, and chemical reactions.
• To summarize experimental innovations, key mechanisms, and findings in the field.

Main Methods:

• Review of microfluidic studies utilizing supercritical carbon dioxide.
• Analysis of applications in solvent extraction, nanoparticle synthesis, and chemical reactions.
• Examination of experimental innovations and key mechanisms.

Main Results:

• Microfluidic integration with scCO2 provides optical transparency, small volume, rapid reactions, and precise fluid manipulation.
• Microfluidics enables process optimization and fundamental studies of extraction and reaction kinetics.
• Small length scales in microfluidics facilitate uniform nanoparticle production with reduced particle size.

Conclusions:

• Microfluidic systems are versatile tools for supercritical carbon dioxide applications.
• The review highlights key findings and innovations in scCO2 microfluidics.
• Future perspectives in the field of scCO2 microfluidics are discussed.