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Chemical Reaction Engineering
Reaction Kinetics
GATE 2011
Medium

Consider an irreversible, solid catalysed, liquid phase first order reaction. The diffusion and the reaction resistances are comparable. The overall rate constant (ko) is related to the overall mass transfer coefficient (km) and the reaction rate constant (k) as

  • ko=kkm/(k+km)
  • Bko=(k+km)/(kkm)
  • Cko=(k+km)/2
  • Dko=k+km

Explanation

Comparable diffusion and reaction resistances combine as resistances in series: 1/ko=1/k+1/km, giving ko=k·km/(k+km).

Source: GATE CH 2011 (2011)

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