Table 3.

Group of VOC compound emission from storage tank of petroleum refinery

Group of compound	Contribution (%)	Major contributed compound
Alkane	61.12	Pentane (27.40%), Cyclopentane (19.22%), Cyclohexane (8.9%)
Alkene	33.26	Propene (19.02%), Isobutene (14.22), Isoprene (0.027)
Ketone	4.60	Methyl vinyl ketone (4.41%), 3-Hexanone (0.19%)
Aromatic	0.54	Toluene (0.16%), Styrene (0.1%), 1,2,4-Trimethylbenzene (0.074%)
Aldehyde	0.40	Butanal (0.23%), Hexanal (0.13), Methacrolein (0.03%)
Alcohol	0.04	1-Propanol (0.04%)
Chlorinated hydrocarbon	0.04	Chloroform (0.04%)
Total	100.00