4.4. PAH emission
The influences of COCO blend on PAH emissions is shown in Fig. 7. It has been found that the PAH emission reduces with increasing COCO in blends. It can be said that PAH reduces mainly due to the reduction of aromatics in COCO blends. Similar PAH reduction was also found with sunflower oil [8]. Maximum 21% reduction in PAH emission was found by 50/COCO blend in comparison to conventional diesel fuel. Before extraction particulate matter (PM), the filter was weighed and found that PM was reduced with increasing COCO in blends