Environmental Engineering Reference
In-Depth Information
spontaneously and violently at room temperature with chlorine and fluorine
to form the corresponding hydrogen halides, which are useful and dangerous
acids.
8.2 MECHANISM OF COMBUSTION
Detailed flow reactor studies and kinetic modeling of the H
2
/O
2
reaction has
been reviewed and updated by Dryer and co-workers. This section will
present a brief summary based on the review of Dryer et al. [1, 2]. The
updated H
2
/O
2
reaction mechanism consists of 19 reversible elementary reac-
tions summarized in Table 8.1. These reactions can be categorized into four
TABLE 8.1 Summary of 19 Reversible Elementary Reactions in the H
2
O
2
Reaction Mechanism
H
2
/O
2
chain reactions
1. H
+
O
2
=
O
+
OH
2. O
+
H
2
=
H
+
OH
3. H
2
+
OH
=
H
2
O
+
H
4. O
+
H
2
O
=
OH
+
OH
H
2/
O
2
dissociation/recombination reactions
5. H
2
+
M
=
H
+
H
+
M
H
2
+
Ar
=
H
+
H
+
M
6. O
+
O
+
M
=
O
2
+
M
O
+
O
+
Ar
=
O
2
+
Ar
7. O
+
H
+
M
=
OH
+
M
8. H
+
OH
+
M
=
H
2
O
+
M
H
+
OH
+
Ar
=
H
2
O
+
Ar
Formation and consumption of HO
2
9. H
+
O
2
+
M
=
HO
2
+
M
H
+
O
2
+
Ar
=
HO
2
+
M
H
+
O
2
=
HO
2
10. HO
2
+
H
=
H
2
+
O
2
11. HO
2
+
H
=
OH
+
OH
12. HO
2
+
O
=
OH
+
O
2
13. HO
2
+
OH
=
H
2
O
+
O
2
Formation and consumption of H
2
O
2
14. HO
2
+
HO
2
=
H
2
O
2
+
O
2
HO
2
+
Ar
=
OH
+
OH
+
Ar
15. H
2
O
2
+
M
=
OH
+
OH
+
M
H
2
O
2
+
Ar
=
OH
+
OH
+
Ar
H
2
O
2
=
OH
+
OH
16. H
2
O
2
+
H
=
H
2
O
+
OH
17. H
2
O
2
+
H
=
H
2
+
HO
2
18. H
2
O
2
+
O
=
OH
+
HO
2
19. H
2
O
2
+
OH
=
H
2
O
+
HO
2
H
2
O
2
+
OH
=
H
2
O
+
HO
2
Note
: M for nonreactive gas such as N
2
, Ar, or He.
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