Environmental Engineering Reference
In-Depth Information
482
.
H
2
CCCCH + H
2
→ C
2
H
2
+ C
2
H
3
5.01E+10
0.0
20000
495
.
C
3
H
6
+ CH
3
→ C
3
H
5
+ CH
4
2.21E+00
3.5
5675
513
.
CH
2
+ C
2
H
4
→ C
3
H
6
9.03E+13
0.0
0
514
.
C
3
H
4
+ H → C
3
H
5
1.20E+11
0.7
3007
520
.
C
3
H
5
+ C
2
H
3
→ C
3
H
4
+ C
2
H
4
2.41E+12
0.0
0
521
.
C
3
H
5
+ C
2
H
5
→ C
3
H
4
+ C
2
H
6
9.64E+11
0.0
-131
523
.
C
2
H
4
+ HCH → C
3
H
5
+ H
3.19E+12
0.0
5285.
4
524
C
3
H
4
→ C
3
H
4
P
1.01E+28
-4.6
63183
529
.
C
3
H
4
+
M
→ H
2
CCCH + H + M
1.00E+17
0.0
70000
530
.
C
3
H
4
P +
M
→ H
2
CCCH + H + M
1.00E+17
0.0
70000
531
.
C
3
H
4
+ CH
3
→ H
2
CCCH + CH
4
2.00E+12
0.0
7700
532
.
C
3
H
4
P + CH
3
→ H
2
CCCH + CH
4
2.00E+12
0.0
7700
533
.
C
3
H
4
+ H → C
2
H
2
+ CH
3
2.00E+13
0.0
2400
544
.
C
3
H
4
P + O → HCO + C
2
H
3
7.50E+12
0.0
2102
551
.
C
2
H
2
+ HCCO → H
2
CCCH + CO
1.10E+11
0.0
3000
564
.
2CH
3
+
M
→ C
2
H
6
+ M
3.18E+41
-7.0
2762
617
.
C
2
H
3
+ O
2
→ CH
2
O + HCO
4.00E+12
0.0
-250
837
.
H + C
3
H
8
→ C
3
H
7
+ H
2
1.32E+06
2.5
6756
838
.
OH + C
3
H
8
→ C
3
H
7
+ H
2
O
3.16E+07
1.8
934
847
.
HO
2
+ C
3
H
7
→ OH + C
2
H
5
+ CH
2
0
2.41E+13
0.0
0
Part of C
3
H
4
is converted to C
3
H
4
P (propyne) through R524. Furthermore, C
2
H
2
combines with HCCO through R551 to give H
2
CCCH (propargyl radical), which
goes partially into C
3
H
4
P (-R530). C
3
H
4
and C
3
H
4
P play a central role in the
formation of the first aromatic ring. The importance of C
3
species as PAH precursors
has been already demonstrated in previous investigations.
33-36
Here, too, C
3
species
are seen to be precursors of PAH, rather than C
4
species, which are oxidized in a
large amount. Thus, only a small fraction of the total carbon atoms form PAH at
this condition, because a large amount of them oxidized through C
4
H
4
→ H
2
CCCCH
Search WWH ::
Custom Search