Professor Milorad P. Dudukovic is the Chairman of the Chemical Engineering Department at Washington University in St. Louis, MO, and a leading figure in multiphase reactors. He has authored several highly cited papers on chemical reaction engineering involving kinetic-transport interactions in multiphase systems. He has a commitment to the development of reaction engineering theory and practice for solving a variety of practical and fundamental problems. He is the director of the Chemical Reaction Engineering Laboratory (CREL) at Washington University, which is supported by over a dozen major chemical and petroleum companies. Some of his recent research accomplishments include the development of computer-assisted radioactive particle tracking for studies of multiphase flows for improving computational fluid dynamics (CFD) models for multiphase systems and for selecting environmentally friendly reactors for the conversion of natural and synthesis gas to fuels and chemicals and novel coupling of exothermic and endothermic reactions in a reverse flow reactor to achieve potential improved efficiencies and energy savings. My students, Dr. Pradeep Prasad and Zhongxiang Chen, and I are very proud to contribute this paper to this special issue of Ind. Eng. Chem. Res. on the occasion of the 60th birthday of this outstanding academician, Professor Milorad P. Dudukovic, and we all wish him a long and healthy continuation of his productive and innovative career.