Continuous Flow Microreactors for the High-efficiency Enzymatic Synthesis of 10-Hydroxystearic Acid from Oleic Acid.

Area of Science:

• Biocatalysis and Green Chemistry
• Chemical Engineering and Process Optimization

Background:

• Current oleic acid hydratases suffer from low efficiency and thermal instability.
• Mass transfer limitations in emulsion reactions hinder sustainable fatty acid conversion.

Purpose of the Study:

• To develop an optimized continuous flow micro-reactor (CFMR) for efficient oleic acid conversion.
• To overcome the limitations of existing methods for transforming fatty acids into specialty chemicals.

Main Methods:

• Optimization of liquid storage, mixer, and reaction sections of the CFMR.
• Development of a two-component feed microreactor (TCFMR) to address mass transfer limitations.
• Emulsifier system optimization to improve emulsification.

Main Results:

• Achieved a space-time yield of 597 g L⁻¹ d⁻¹ at 15 g L⁻¹ oleic acid load.
• Reached 91% conversion of 50 g L⁻¹ oleic acid in 30 minutes using TCFMR.
• Demonstrated superior reaction speeds compared to traditional batch stirred tank reactors (BSTR).

Conclusions:

• The optimized CFMR and TCFMR significantly enhance oleic acid conversion efficiency.
• These advancements overcome key barriers in fatty acid utilization for sustainable chemical synthesis.
• The developed reactor systems represent a significant step forward in biocatalysis and green chemistry applications.