Tuba Hatice DOĞAN is an Associate Professor in the Department of Chemical Engineering at a university in Turkey. Her work is more focused on alternative fuels, especially Biodiesel, which is a clean and sustainable fuel. She has many articles, papers and projects on purification of biodiesel, heterogeneous catalysts used in biodiesel production, biodiesel production from animal and vegetable waste oils, improvement of cold flow properties of biodiesel and fuel properties. She also advises graduate students on these issues. In today's world where energy and the environment are very valuable, she will continue her research on the research of environmentalist and alternative energy sources.