Environmental Engineering Reference
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Fig. 4.14 NO x and SO 2 removal efficiency at different molar ratios of O 3 /NO
Fig. 4.15 Various ion concentrations at different molar ratios of O 3 /NO
Meanwhile, the ion concentrations depicted in Fig. 4.15 show that with
increasing the molar ratio within 0.7 - 1.0, a particularly low the NO 3
concentration appears and varies slightly, while the NO 2 concentration increases.
These observations occur because the increasing NO 2 content takes part in the
redox reactions with tetravalent-S components. After the molar ratio exceeds 1.0,
the NO 3 and NO 2 concentrations rapidly increase and decrease with the molar
ratio, respectively. These findings are attributed to the fact that with the excessive
O 3 existence, the generated N 2 O 5 reacts with H 2 O to produce a considerable
dosage of nitric acid through the aforementioned reactions in Eqs. (4.12) - (4.14),
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