Microbubbles: formation, properties, applications

Microbubbles are small gas bubbles (approximately 1 – 1000 microns in size) dispersed in a liquid. In many respects, they behave differently from ​‘normal’ bubbles measuring millimeters and centimeters, which are used in most multiphase devices (contactors, reactors). They have a low rising velocity and thus a long delay time, which improves transport and reaction processes and reduces waste. They have a large specific surface area (m²)/(m³) for a given volume of gas in the device. They are increasingly used in various applications, but still their behaviour under complex industrial conditions is not fully understood.

In this dissertation, the student will learn the basic skills of working with microbubbles, such as their preparation using microbubble generators and the characterization of their basic properties. They will then solve a given project involving their specific use in a process or application. The project topic will be assigned by agreement, depending on current opportunities and possibilities. The knowledge gained will be applicable in various types of industrial applications (chemical, biotechnological, food, metallurgical, pharmaceutical, environmental, etc.).

Requirements

• Master degree, in chemical engineering or a related field, creative approach to research, and teamwork ability.