Vol. 41, No.3, Summer 2007 185 I n many widely used textbooks in chemical reaction engineering courses, such as Fogler, [1] Levenspiel, [2] and Carberry, [3] the derivation of the conservation equation for the species in a gas mixture, either a pore or pellet domain, is conducted by a “global” approach—where many assump- tions and processes are hidden. These assumptions carry signiicant concepts associated with engineering scaling that (if properly used) offer a powerful learning environment to train students in engineering scaling. This training is useful in handling current chemical engineering problems and it enhances student readiness to ind solutions to these practical situations. In fact, an educational environment that introduces scaling as an effective learning tool leads to an excellent understanding of processes at the nano-, micro-, and macro- scales in students. This, in turn, offers an economical training for students as they learn both fundamental principles and up-scaling simultaneously. ChE classroom ThE CaTalyTiC PEllET: A Rich Prototype for Engineering Up-Scaling Pedro e. Arce, Tennessee Tech University • Cookeville, Tennessee MArio oyAnAder Universidad Católica del Norte • Antofagasta, Chile StePhen WhitAker University of California • Davis, California © Copyright ChE Division of ASEE 2007 Pedro E. Arce is a professor and chair of the chemical engineering department at Tennessee Tech University. His interests in engineering education are in active and collaborative engineering learning environ- ments. His research interests are centered on electrokinetic-hydrody- namics with applications to soft materials, high oxidation methods, and applied and computational mathematics. Mario A. Oyanader is an associate professor of chemical engineering at the Universidad Católica del Norte in Antofagasta, Chile. His interests in engineering education are in introducing “real world problems” to students and bringing them into research at early stages of their ca- reers. His research interests are focused on chemical environmental processes with applications to electrokinetic soil cleaning, contamina- tion control, and water management. Stephen Whitaker is professor emeritus at the University of California, Davis. His interests in engineering education are in introducing students to the fundamentals of science and engineering using a sequential and calculus-based approach, and using up-scaling principles to derive engineering equations. His research interests are in transport phenomena in porous media, volume-averaging methods, and transport and reacting systems.