This textbook is primarily aimed at students of chemistry, chemical engineering, and process engineering at universities of applied sciences and in the academic field. Additionally, it is intended to provide engineers and professionals who encounter reaction engineering challenges in their work with the necessary tools to solve these problems and to enhance their expertise. It is designed as a textbook suitable for self-study, introducing the methods and fundamentals of chemical reaction engineering. The solution of typical problems is presented in each chapter through detailed examples, supplemented by numerous illustrations, tables, literature references, and exercises with provided answers and, where applicable, hints for solutions.