Environmental Engineering Reference
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(a)
1.0
(b)
100
(NO)/ppm
=0,300,600,900
0.8
Hg
0
(g)
Hg
2+
(g)
HgO
(g)
HgO
(s)
80
0.6
60
0.4
40
(NO)=600 ppm
0.2
20
0.0
0
400
800
1200
1600
2000
400
800
1200
1600
2000
T
(K)
T
(K)
Fig. 4.68
Influence of NO on mercury speciation transformation
4.4.3.5 Influence of SO
2
To investigate the impact of SO
2
on mercury speciation transformation, Case 4
condition was designed. The results are displayed in Fig. 4.69. When the concen-
tration of SO
2
was 500 ppm in the flue gas, compared with no SO
2
, it was obvious
that HgS
(g)
, HgSO
4(g)
and Hg
2
SO
4(g)
appeared in the reaction product of mercury.
10
(a)
8
Hg
0
(g)
Hg
2+
(g)
HgO
(g)
HgS
(g)
HgSO
4(s)
6
4
Hg
2
SO
4(s)
(SO
2
)=5 *10
-4
2
0
400
800
1200
1600
2000
T
(K)
(b
)
100
(SO
2
)/ppm
80
0
100
500
1200
60
40
20
0
400
800
1200
1600
2000
T
(K)
Fig. 4.69
Influence of SO
2
on mercury speciation transformation
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