The generational shift in biofuels: A path toward sustainable energy solutions

Abstract

In recent years, the global population boom, modernization, and industrialization have significantly increased energy demand. Currently, fossil fuels dominate the energy market but come with environmental costs, including greenhouse gas emissions and global warming, leading to ozone depletion. This underscores the urgent need for sustainable alternatives to fossil fuels. Biofuels have emerged as a promising solution in the transition to a low-carbon future. These energy-rich compounds are produced from biomass and have evolved across three generations. The first generation relied on food crops, causing competition with food supplies. Second-generation biofuels utilized non-food biomass like lignocellulose. Third-generation biofuels addressed production costs by using algae and metabolic engineering, offering a more cost-effective and sustainable energy source. This review explores the origin of biofuel world with insights into its generational shift. It presents a complete picture of biofuel production, its challenges, and its adaptation by providing a comprehensive analysis of feedstock selection, various conversion processes and their detailed comparison. The review focuses on the sustainability impact of each biofuel generation in terms of its economics and environmental, social status. Interest has also been shown to compare biofuels with competing technologies, connecting biofuel production with other renewable energy systems, regulatory policies and frameworks for adoption of biofuel to provide an extensive platform for future research and policy directions in the field of green energy.