Discuss the principles of chemical reaction engineering and their applications in industrial processes. Analyze the design considerations for reactors, including reactor types, kinetics, and thermodynamics. Elaborate on the factors influencing reactor performance, such as residence time, mixing, and heat transfer. Evaluate the importance of reaction mechanisms and catalysts in optimizing chemical processes. Provide examples of reactor systems used in the production of fuels, polymers, and pharmaceuticals, highlighting their impact on process efficiency and product quality.