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What is the unit of mass transfer coefficient?(a) ms(b) m/s(c) ms^2(d) ms^-2This question was posed to me during an interview.My enquiry is from External Mass Transfer in portion Heterogenous Reactions of Bioprocess Engineering

Answer» RIGHT OPTION is (b) m/s

Explanation: Molar flux form a BULK fluid at concentration CAb to the surface of a spherical particle of diameter dp at concentration CAs:

WA = kC (CAb-CAs)

Where, WA (Molar flux) = moles/m^2s

kC (Mass transfer coefficient) = m/s.


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