Question

Which of the following happens in the use of Raschig rings in place of crushed stones as packing in packed beds (other things being same)?

• A. increases pressure drop, increases surface area
• B. increases pressure drop, decreases surface area
• C. decreases pressure drop, increases surface area
• D. decreases pressure drop, decreases surface area

Hint:

Using structured packing like Raschig rings improves efficiency in packed bed operations.

Answer 1

The Correct Option is C

- Raschig rings provide a more uniform packing and better flow distribution compared to crushed stones.
- They reduce the pressure drop and increase the surface area for mass transfer. 
Conclusion: The correct answer is option (C).