FLAMEX INDUSTRIES : FXD Comparison Of Fuel Gas Properties

COMPARISON OF FUEL GAS PROPERTIES

COMBUSTION PROPERTIES	FXD +Propane	FXD +Butane	ACETYLENE	MAPP GAS	NATURAL GAS	PROPANE	BUTANE	APACHI/HPG
Flame Temp in Oxygen, F	5900 +	6000	5875	5301	4600	4579	4925	5300
Total Heating Value after Vaporization BTU/lb	22896	22743	21500	21100	24800	19768	19494	22100
Heating Value of gas, BTU/ft	2700	3603	1480	2380	1050	2560	3374	2400
Burning Velocity in Oxygen, ft/sec	14.3	12.5	22.7	15.4	15.2	12.2	11	15
Formation Reaction	Exothermic	Exothermic	Endothermic	Endothermic	Exothermic	Exothermic	Exothermic	Endothermic
Primary Combustion Heating Value BTU/ft	350	360	505	484	55	295	315	438
Secondary Combustion Heating Value, BTU/ft	2270	3240	1134	1896	995	2268	3114	1962
Combustion Ratio	2.06:1	1.9:1	1.5:1	3.5:1	2:1	4.7:1	1.8:1	3.1:1
SAFETY Shock Sensitivity	Stable	Stable	Unstable	Relatively Stable	Stable	Stable	Stable	Stable
Explosive Limits in Oxygen, %	2.5 - 58	1.7 - 60	3.0 - 93	2.5 - 60	5.0 - 59	2.4 - 57	1.8 - 60	2.0 - 57
Explosive Limits in Air, %	2.25 - 9.40	1.7 - 9.0	2.5 - 80	3.4-10.8	5.3 - 14	2.3 - 9.5	1.8 - 8.4	2.0 - 10.0
Maximum allowable Use Pressure	Cylinder	Cylinder	PSI 15	Cylinder	Line	Cylinder	Cylinder	Cylinder
Tendency to Backfire	Slight	Slight	Considerable	Moderate	Slight	Slight	Slight	Slight
Reactions with Common Materials	Few Restrictions	Few Restrictions	Copper & Silver Alloys	Copper & Silver Alloy	Few Restrictions	Few Restrictions	Few Restrictions	Few Restrictions

PHYSICAL PROPERTIES

	FXD	Acetylene	MAPP	NG	Propane	APG
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