Soybean oil transesterification by the use of a microwave flow system

► Biodiesel production from soybean transesterification by use of microwave flow system. ► We examine influences of residence time and microwave power on final temperature. ► Residence times between 2.5 and 14 min and microwave powers until 200 W are enough. ► Heating by microwave system is more effective than conventional heating. ► Biodiesel's properties fulfil the limits of Norm EN 14214.