Chemical engineering is one of the most sublime engineering disciplines. It is an extremely important and influential profession on the development of civilization. From the creation of ancient pottery (100 centuries ago) to plaster (40 centuries ago), then paper (20 centuries ago), and Portland cement that is hugely used to make concrete (2 centuries ago). Even though chemical engineering is a significant field essential for the development and optimisation of most products in the world, not many people know what it is, let alone the work of a chemical engineer, which is more than just designing processes to change raw materials into valuable products. This book aims to provide a snapshot of the diverse works that a chemical engineer does. We solve problems to improve our everyday quality of life.