________________
Gas
"The limits of inflammability There is a particular limit to excess air or oxygen in combustion of each kind of the gas and when this limit is surpassed the gas becomes non-inflammable. Similarly there is also a particular lower limit of deficient air of oxygen required for combustion of each kind of the gas and when this limit is transgressed, the gas becomes noninflammable. Table 3.8 illustrates both the upper and the lower limits of inflammability.
TABLE 3.8 Limits of Inflammability of Gases in Air (At ordinary temperatures and at atmospheric pressure)
Limits as percent by volume in air Percent
Percent lower limit
upper limit mixture
mixture Hydrogen (H)
6.2
71.4 Carbon monoxide (CO) 16.3
71.2 Coal gas
21 Coke-Oven gas Blue water gas Blast-furnace gas Methane (CH)
13.3 Ethane (CH)
10.6 Ethylene (CH)
14.1 Ethyl alcohol (CH,OH) 3.7
13.7 Benzene (CH2)
1.4
5.5 Pentane (CH)
1.3
4.9 Ether (C2H3)2
7.7
36
65
5.8
3.3
3.4
1.6
37. gfa anillastest, yel zen Trel, 48 53, 54 38. Trapef a, 5/24
76 -
THE
FUI 3*124
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