Equação de Fenske

Fracionamento de refluxo total.

Na engenharia química, a equação de Fenske é utilizada na destilação fracionada para calcular o número mínimo de prateleiras teóricas necessárias para a separação de alimentos por uma coluna de fracionamento, a qual é operada por um condensador Allihn.[1][2][3] A primeira e a mais comum fórmula para esta teoria de Merrell Fenske, ex-professor da Universidade Estadual da Pensilvânia, é descrita como:[4][5]

,

onde:

  • é o número mínimo de prateleiras teóricas necessárias a um operador de refluxo total,
  •  é a fração molar de maior volatilidade em uma sobrecarga,
  •  é a fração molar de maior volatilidade em partes inferiores,
  •  é a média da volatilidade relativa.

Referências

  1. Chapter 4 Arquivado em 31 de maio de 2014, no Wayback Machine., (From the website of Cal Poly Pomona in California. Lecture notes of Professor Thuan Ke Nguyen for the course entitled CHE313, Mass Transfer. See page 4-42.)
  2. David S.J. Jones and Peter P. Pujado (Editors) (2006). Handbook of Petroleum Processing 1st ed. [S.l.]: Springer. ISBN 1-4020-2819-9  (See page 200.)
  3. Henry Kister (1992). Distillation Design 1st ed. [S.l.]: McGraw-Hill. ISBN 0-07-034909-6  (See equations 3.4 and 3.5 on page 106.)
  4. A. Kayode Coker (2010). Ludwig's Applied Process Design for Chemical and Petrochemical Plants, Volume 2 4th ed. [S.l.]: Gulf Professional Publishers. ISBN 978-0-7506-8366-1 
  5. Binay K. Dutta (2007). Principles of Mass Transfer and Separation Processes. [S.l.]: Prentice Hall of India. ISBN 978-81-203-2990-4  (See equation 7.88 on page 375.)

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