Abstract
This paper presents a condensed exposition of some of the research work on the bifurcation and chaotic behavior of industrially and fundamentally important chemical and biochemical reaction engineering systems. Two cases are presented: a forced industrial fluid catalytic cracking unit and an enzymatic system. The Poincare bifurcation diagrams obtained for both cases reveal their richness in dynamic behavior. Various routes to chaotic behavior have been identified including period doubling, intermittency, crisis.