EF Fuel Additive, Comparison of Fuel Gas Properties

COMBUSTION PROPERTIES	EF +Natural Gas	EF +Propane	EF +Butane	NATURAL GAS	PROPANE	BUTANE
Flame Temp in Open Air, deg. F	3885	3916	3908	3542	3596	3578
Total Heating Value after Vaporization BTU/lb	28520	22896	22743	24800	19768	19494
Burning Velocity in Open Air, ft/sec	15.2	14.3	12.5	15.2	12.2	11
Formation Reaction	Exothermic	Exothermic	Exothermic	Exothermic	Exothermic	Exothermic
Primary Combustion Heating Value BTU/ft3	NA	350	360	55	295	315
Secondary Combustion Heating Value, BTU/ft3	NA	2270	3240	995	2268	3114
Combustion Ratio	2:1	2.06:1	1.9:1	2:1	4.7:1	1.8:1
SAFETY Shock Sensitivity	Stable	Stable	Stable	Stable	Stable	Stable
Explosive Limits in Open Air, %	5.0 - 59	2.5 - 58	1.7 - 60	5.0 - 59	2.4 - 57	1.8 - 60
Explosive Limits in Air, %	5.3 - 14	2.25 - 9.40	1.7 - 9.0	5.3 - 14	2.3 - 9.5	1.8 - 8.4
Maximum allowable Use Pressure	Line	Cylinder	Cylinder	Line	Cylinder	Cylinder
Tendency to Backfire	Slight	Slight	Slight	Slight	Slight	Slight
Reactions with Common Materials	Few Restrictions	Few Restrictions	Few Restrictions	Few Restrictions	Few Restrictions	Few Restrictions

COMBUSTION PROPERTIES	EF +Natural Gas	EF +Propane	EF +Butane	NATURAL GAS	PROPANE	BUTANE
Specific Gravity of Liquid (60F)	0.514	--	0.576	--	0.507	0.527
Pounds Per Gallon at 60F	4.26	--	4.8	--	4.22	4.38
Cubic Feet Per Pound of Gas at 60F	8.48	14.5	8.85	23.6	8.45	9.2
Specific Gravity of Gas (air=1) at 60F	1.6	0.906	4.48	0.555	1.55	1.42
Vapor Pressure at 70F, psig	118	--	94	--	120	135
Boiling Range at 760 mm Hg, F	-46	-119	-36 to -4	-250	-44	-50
Latent Heat of Vaporization BTU/lb	183	--	227	--	184	187