Biodiesel production is a very modern and technological area that is wining relevance and market due to its benefits, such as that it is biodegradable, a renewable and alternative source of fuel with less pollutants and less particle pollution. Different studies have been carried out using various oils as raw material, different alcohol as well as different catalysts, homogeneous ones such as sodium hydroxide, potassium hydroxide, sulphuric acid and supercritical fluids, and heterogeneous ones such as solid resins and enzymes as well as new technologies that are being developed every day. This book discusses the global energy situation in regard to the biodiesel industry, as well as a specific focus on operational conditions, kinetics model and economic comparison in order to see if they could be used as profitable alternatives.