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Suggest ways to reduce the required packed tower height while maintaining a specified separation.

Suggest ways to reduce the required packed tower height while maintaining a specified separation.

Engineering   Chemical-Engineering   
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Answer #1

The recquired packed tower height can be reduce by lowering the value of HTU & NTU .

where ,

  • Height of tarnsfer unit (HTU) tells us the relative ease with which a given packing can accomplish the separation. for a good packing (i.e. a packing which provides high interfacial area) the value of HTU is lesser and the height recquired for a specified degree of separation is smaller. HTU is indirectly proportional to the quality of packing.
  • Number of transfer units (NTU) indicates the difficulty of separation . the greater the extent of separation desired the larger will be the Number of transfer units . NTU is indirectly proportional to the ease of separation.

The product of HTU and NTU gives us the packed height.

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