Gas fuel properties

Question 1

Chemical symbol for NG, LP, Butane

Answer 1

NG: CH4
LP: C3H8
Butane:C4H10

More Carbon - More CO2 as byproduct of combustion

Question 2

Heat Content for NG, LP, Butane (BTU/ft^3)

Answer 2

NG: 1025
LP: 2520
Butane: 3260

Question 3

Specific Gravity for NG, LP, Butane (density gas/density air)

Answer 3

NG: 0.555
LP: 1.566
Butane: 2.072

Question 4

Ultimate CO2 for NG, LP, Butane (ppm)

Answer 4

NG: 11.68
LP: 13.76
Butane: 14.06

Question 5

Flame Speed for NG, LP, Butane (ft/s)

Answer 5

NG: 0.767-2.20
LP: 0.682-2.78
Butane: 0.660-2.86

NG has lower flame speed than all the rest of the fuel types

Question 6

Combustion (Flammability) limits for NG, LP, Butane (% by volume)

Answer 6

NG: 5.3/9.5/15.0
LP: 2.4/23.8/47.6
Butane: 11.8/30.9/53.7

Question 7

Air/Fuel Stoichiometric Mixture Ratio for NG, LP, Butane (% by volum)

Answer 7

NG: 9.53
LP: 23.8
Butane: 30.9

Question 8

Flame Temperatures for NG, LP, Butane (deg F)

Answer 8

NG: 3485
LP: 3595
Butane: 3615

Question 9

Self-Ignition Temperature for NG, LP, Butane (deg F)

Answer 9

NG: 1336-1472
LP: 997-1090
Butane: 960-1060

Question 10

Therm of gas

Answer 10

NG: 98ft^3
LP: 40ft^3
Butane: 31ft^3

Question 11

Octane number

Answer 11

NG: 110
LP: 100
Butane: 92