Absorption - Ab sorption / Stripping Typical Absorber...

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Unformatted text preview: Ab sorption / Stripping Typical Absorber Solvent (water) 1943 kgmol / hr Feed (air + acetone) 703 kgmol / hr 1.4 mol % acetone Effluent Air 70 ppm (molar) acetone Packed Tower Water Out Mass Balance Tray 1 Tray N L o , L m , x o , X o L N , L m , x N , X N G N+1 , G m , y N+1 , Y N+1 G 1 , G m , y 1 , Y 1 The Theoretical Stage L N-1 , L m , x N-1 , X N-1 L N , L m , x N , X N G N+1 , G m , y N+1 , Y N+1 G N , G m , y N , Y N Stage N Leaving streams in thermodynamic equilibrium Passing streams linked by material balance Absorber Operating Line Solvent 200 80/20 N 2 / CO 2 80/16 80/12 80/8 80/4 200/4 200/8 200/12 Solvent / CO 2 200/16 4 CO 2 4 CO 2 4 CO 2 4 CO 2 Molar Flows Tray 1 Tray 2 Tray 3 Tray 4 Graphical Technique Graphical Technique Graphical Technique Kremser Method for Theoretical Trays (Absorber) Tray 1 Tray N L o , x o L N , x N G N+1 , y N+1 G 1 ,y 1 G m L A where A A A mx y x m y N o o N = + --- = + : log 1 1 1 log 1 1 Kremser Method for Theoretical Trays (Stripper) Tray 1 Tray N L o , x o L N , x N G N+1 , y N+1 G 1 ,y 1 L G m S where S S S m y x m y x N N N N o = + - -- = + + : log 1 1 1 log 1 1 Example Carbon Disulfide, CS 2 , used as a solvent in a chemical plant, is evaporated from the product in a drier into an inert gas (essentially N 2 ) in order to avoid an explosion hazard. The vapor-N) in order to avoid an explosion hazard....
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This note was uploaded on 04/17/2008 for the course CHE 363 taught by Professor Maynard during the Summer '08 term at University of Texas at Austin.

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Absorption - Ab sorption / Stripping Typical Absorber...

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