Question

For Boston method, ln Kbj

(a) Aj +  B (1j/Tj – 1/T*)

(b) Aj – B (1j/Tj – 1/T*)

(c) Aj – B (1j/Tj + 1/T*)

(d) (1j/Tj + 1/T*)

I got this question during an interview for a job.

This interesting question is from Inside Out Method topic in chapter Rigorous Distillation Calculations of Distillation Design

Answer 1

Right option is (b) Aj – B (1j/Tj – 1/T*)

To explain I would say: For Boston method ln Kbj = Aj – B (1j/Tj – 1/T*), this method is a revised version of the Russell method including T* i.e. equilibrium temperature.