Consecutive immobilized enzymatic reactions with and without enzyme denaturation

Area of Science:

• Biochemical Engineering
• Chemical Kinetics
• Enzyme Immobilization Technology

Background:

• Enzyme immobilization is crucial for industrial biocatalysis, but reaction rates can be limited by diffusion and enzyme stability.
• Previous models often used simplified kinetics, potentially misrepresenting complex immobilized enzyme systems.
• Understanding these limitations is vital for optimizing biocatalytic processes.

Purpose of the Study:

• To analyze consecutive biochemical reactions in immobilized enzymes considering both internal and external diffusion.
• To compare the effectiveness factor predicted by rigorous nonlinear kinetics versus simplified first-order kinetics.
• To investigate the impact of significant enzyme denaturation on reaction system behavior.

Main Methods:

• Employed rigorous nonlinear reaction kinetics for steady-state analysis.
• Utilized an unsteady-state model to investigate significant enzyme denaturation.
• Analyzed substrate concentration responses to variations in physical and kinetic parameters.

Main Results:

• Demonstrated substantial differences between nonlinear and first-order kinetics predictions for the effectiveness factor.
• Identified significant impact of enzyme denaturation on reaction system dynamics.
• Revealed unique characteristics of the reaction system under varying parameters.

Conclusions:

• Rigorous nonlinear kinetics are essential for accurately modeling immobilized enzyme reactions, outperforming first-order approximations.
• Enzyme denaturation significantly alters system behavior, necessitating dynamic modeling approaches.
• The study provides valuable insights into optimizing immobilized enzyme reactor design and performance.