Since the bioethanol industry has also led the automotive industry to explore new avenues, this book summarizes the various aspects of ethanol motorization, hybrid engine development, and biofuel electrification. For decades, clean and renewable alternatives have been sought to reduce dependence on petroleum-based fossil fuels and CO emissions. Bioethanol appears as one of the best solutions for the production of biofuels, bioenergy and biochemicals, along with the establishmentof new biorefinery concepts and a circular bioeconomy. Therefore, the ideas and technologies presented in this book contribute to the UN Sustainable Development Goal 7: . This book is a useful reference for postgraduate students and researchers interested in biorefinery and biofuel technologies, both in academia- and commercial laboratories. Early career scientists can use it to fast track into the field. Advanced scientists will find it helpful to gain a broader overview of the field beyond their area of specialization.