This book presents the select proceedings of the 76th Indian Chemical Engineering Congress (CHEMCON–2023) which was focused on energy transitions towards sustainable development. It includes the latest developments in the energy science and engineering towards sustainable development. It also discusses the role of machine learning & IoT in chemical engineering. Various topics covered include chemical engineering, process engineering, biofuel and biosafety, advanced techniques for waste-to-wealth generation, bioinformatics for energy transition, green and renewable membranes and carbon capture sequestration and utilization, electrochemical energy, biodiesel and bioplastics toward low-carbon footprint and sustainable food packaging. The book will be a valuable reference for researchers and professionals interested in sustainable energy and allied fields.