Gas phase transesterification reactions catalyzed by lipolytic enzymes

Area of Science:

• Biocatalysis
• Enzyme Engineering
• Chemical Reaction Engineering

Background:

• Enzymatic transesterification is a key green chemistry process.
• Gas-solid reactor systems offer advantages for high-temperature biocatalysis.
• Controlling enzyme hydration is crucial for activity in non-aqueous environments.

Purpose of the Study:

• To investigate the activity of porcine pancreatic lipase and Fusarium solani cutinase in a continuous gas-solid reactor.
• To determine the influence of water activity on enzyme performance under high-temperature gas-phase reaction conditions.

Main Methods:

• Utilized a continuous packed-bed gas-solid reactor.
• Employed porcine pancreatic lipase and Fusarium solani cutinase as catalysts.
• Reacted methyl propionate and ethyl propionate with primary alcohols at high temperatures.
• Varied the water activity (A(w)) of the enzyme preparations.

Main Results:

• Both enzymes catalyzed transesterification reactions in the gas-solid phase.
• Enzyme activity was highly sensitive to the water activity of the enzyme preparation.
• Optimal water activity levels were identified for sustained enzyme function.

Conclusions:

• Water activity is a critical parameter for enzyme stability and performance in gas-solid phase biocatalysis.
• Gas-solid reactor systems can be effectively utilized for enzymatic transesterification with careful control of enzyme hydration.
• These findings provide insights for optimizing enzymatic processes in non-conventional reaction media.