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Questions and Answers
Which equipment is commonly used for distillation in chemical engineering?
Which equipment is commonly used for distillation in chemical engineering?
- Rotary dryer
- Plate column
- Heat exchanger
- Packed column (correct)
What is the purpose of a desiccant in a drying process?
What is the purpose of a desiccant in a drying process?
- To increase the temperature of the drying medium
- To enhance the color of the dried product
- To absorb moisture from the air (correct)
- To reduce the pressure inside the drying equipment
What does the term 'absorption' refer to in mass transfer?
What does the term 'absorption' refer to in mass transfer?
- The process of a liquid evaporating into a gas
- The process of heat transfer between two fluids
- The process of solid particles settling in a liquid
- The process of a gas dissolving in a liquid (correct)
In which type of extraction process is solvent extraction commonly used?
In which type of extraction process is solvent extraction commonly used?
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Study Notes
Distillation Equipment
- Commonly used equipment includes distillation columns, condensers, and reboilers.
- Distillation columns can be packed or tray columns, selected based on the separation efficiency required.
- Other equipment may include heat exchangers and receivers for collecting distillate.
Purpose of a Desiccant
- Desiccants are materials specifically designed to remove moisture from the air or other gases.
- They are crucial in drying processes to ensure product stability, quality, and shelf-life by preventing moisture-related degradation.
- Common desiccants include silica gel, calcium sulfate, and molecular sieves.
Absorption in Mass Transfer
- Absorption refers to the process where a gas permeates a liquid or solid phase, resulting in the gas being taken up and dissolved.
- This process is essential in various applications such as air purification, carbon capture, and chemical production.
- Key parameters include the mass transfer coefficient and the equilibrium relationship between phases.
Solvent Extraction Process
- Solvent extraction is commonly used in liquid-liquid extraction processes.
- It separates compounds based on their solubility differences in two immiscible liquids, typically water and an organic solvent.
- Widely applied in pharmaceuticals, food industries, and metal recovery from ores.
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