I have worked on B0, B10 and B20, B100 blends (soybean, waste cooking oil, and tallow with ultra-low sulfur diesel). Looked into its combustion and emission characteristics. for more details please check the link below.
Technical Report Experimental Modeling of NOx and PM Generation from Combusti...
instead of searching for a latest biodiesel, looking into a biodiesel with good properties like calorific value, density etc will be of good help i guess.