Prof. Christo Boyadjiev is Professor Emeritus at the Institute of Chemical Engineering, Bulgarian Academy of Sciences. He received his PhD in 1968 from the Moscow Institute of Chemical Engineering. His current research interests include gas purification and the development of new approaches for modeling and simulation of chemical engineering processes. Prof. Boyadjiev has published over 220 scientific papers in international journals and is an author of 9 books. In 2011, his monograph “Theoretical Chemical Engineering, Modeling and Simulation” was awarded the Excellence in Natural Sciences prize by the Union of Bulgarian Scientists.