Simultaneous Removal of NOx and SO2 by MgO Combined with O3 Oxidation: The Influencing Factors and O3 Consumption Distributions
Simultaneous removal of NO x and SO 2 by MgO combined with O 3 oxidation was studied. The effects of the O 3 /NO molar ratio, oxidation temperature, and oxidation residence time on N 2 O 5 decomposition and O 3 consumption distributions were systematically illustrated, which is of great significance...
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| Published in | ACS omega Vol. 4; no. 25; pp. 21091 - 21099 |
|---|---|
| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
American Chemical Society
17.12.2019
|
| Online Access | Get full text |
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| Summary: | Simultaneous removal of NO
x
and SO
2
by MgO combined with O
3
oxidation
was studied.
The effects of the O
3
/NO molar ratio, oxidation temperature,
and oxidation residence time on N
2
O
5
decomposition
and O
3
consumption distributions were systematically illustrated,
which is of great significance for improving NO
x
removal efficiency and reducing O
3
consumption
in practical application. When the O
3
/NO molar ratio was
greater than 1.0, the highest N
2
O
5
yield was
achieved at 90 °C. The NO
x
removal
efficiency reached 96.5% at an O
3
/NO molar ratio of 1.8.
The oxidation temperature increased from 90 to 130 °C, resulting
in the decrease of N
2
O
5
yield, the improvement
of O
3
-ICC (O
3
invalid cycle consumption) caused
by N
2
O
5
decomposition, and the decrease of NO
x
removal efficiency from 96.5 to 76%. Besides,
the effects of pH, SO
2
concentration, and MgSO
3
addition on NO
x
removal efficiency were
also investigated. The results showed that the removal efficiency
of NO
x
decreased with the increase of
SO
2
concentration, while MgSO
3
addition into
MgO slurry could promote the absorption of NO
2
due to the
reaction between NO
2
and SO
3
2–
. |
|---|---|
| ISSN: | 2470-1343 |
| DOI: | 10.1021/acsomega.9b02502 |