Furthermore, the commonly obtained pyrolysis oil is up graded to {HEAD ~ a high grade gasoline}, rich in mono aromatics and free from {TAIL ~ undesirable durenes} and long aliphatic chains 
free from
Furthermore , the commonly obtained pyrolysis oil is up graded to { HEAD ~ a high grade gasoline } , rich in mono aromatics and free from { TAIL ~ undesirable durenes } and long aliphatic chains
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH