Dr. Reza Davarnejad was born in 1978 (Arak, Iran). He received his bachelor and master in petrochemical and chemical engineering in Iran in 2002 and 2004, respectively. He joined University Sains Malaysia (Penang, Malaysia) and he continued his study in chemical engineering (separation processes). He focused on the supercritical technology, thermodynamics and biotechnology. He was awarded PhD. degree in 2010. He has a lot of publications and research activities. Furthermore, he worked as a process engineer in Shazand Petrochemical Corporation, as a researcher assistant in University Sains Malaysia and as an invited lecturer in several universities. He has joined the Chemical Engineering Department of Arak University as an assistant professor in 2010. He is presently teaching and researching there. Currently, he is as a fixed reviewer and assistant editor in many technical valid journals.