Bypass chromatography--design and analysis of an improved strategy for operating batch chromatography processes

Area of Science:

• Chemical Engineering
• Separation Science
• Chromatography

Background:

• Batch chromatography is a common separation technique.
• Improving efficiency and purity in batch chromatography is crucial for industrial applications.
• The bypass method offers a potential strategy to enhance performance.

Purpose of the Study:

• To analyze the performance improvement of batch chromatographic separations using the bypass method.
• To present a general approach for designing bypass batch chromatography.
• To develop analytical design equations for binary systems with linear or Langmuir isotherms.

Main Methods:

• Analysis of bypass chromatography where only a portion of the feed is purified.
• Development of analytical design equations based on equilibrium theory.
• Modeling for binary systems with linear or competitive Langmuir adsorption isotherms.

Main Results:

• The bypass strategy enhances batch chromatography productivity without increasing eluent consumption.
• Optimal loading and bypass amounts can be calculated to meet purity requirements without waste.
• For Langmuir isotherms, maximum productivity is achieved when the less retained component is collected at 100% purity.

Conclusions:

• The bypass method is a viable strategy for improving batch chromatographic separations.
• This approach allows for precise control over purity and minimizes waste.
• The study provides a framework for designing and optimizing bypass batch chromatography systems.