Branislav Jaćimović, PhD, is a retired mechanical engineering professor from the Univ. of Belgrade (Kraljice Marije 16, 11000 Belgrade, Serbia). He has over 40 years of experience in the fields of separation processes (especially distillation) and heat exchanger design. He is a registered professional engineer in Serbia and holds BS, MS, and PhD degrees in mechanical engineering from the Univ. of Belgrade.