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0
Q , t t, C Convection
0
Chlorine Ammonia

Wind speed, m/s

1 2 3 4 5 10 1 2 3 4 5 10

+40 34.7 20.0 14.9 12.3 4.90 3.10 2.50 2.20

Table 6.9 – Physical and chemical properties of toxic substances
Density, t/m 3 K at the t 0
7
Toxic
3
2
substances gas liqui K 1 K K -40 0 -20 0 0 0 20 0 40 0
d

Ammonia 8 10 -4 0.681 0.18 0.025 0.04 0/0.9 0.3/1 0.6/1 1/1 1.4/1
(storage under
pressure)

Ammonia - 0.681 0.01 0.025 0.04 0/0.9 1/1 1/1 1/1 1/1
(isothermal
storage)

Sulphurous 2.9 10 -3 1.462 0.11 0.049 0.33 0/0.2 0/0.5 0.3/1 1/1 1.1/1
anhydride 3

-3
Hydrogen 1.5 10 0.964 0.27 0.042 0.03 0.3/1 0.5/1 0.3/1 1/1 1.2/1
sulfide 6

Formaldehyde - 0.815 0.19 0.034 1 0/0.4 0/1 0.5/1 1/1 1.5/1

-3
Chlorine 3.2 10 1.538 0.18 0.052 1 0/0.9 0.3/1 0.6/1 1/1 1.4/1
Chloropicrin - 1.658 0 0.002 30 0/0.3 0.1 0.3 1 2.69

Table 6.10 – The value of coefficient K depending to the value of wind
4
speed
Wind 1 2 3 4 5 6 7 8 9 10 15
speed, m/s

K 4 1 1.33 1.67 2 2.34 2.67 3 3.34 3.67 4 5.68

Table 6.11 – The depth of the areas of possible pollution, km

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