Give reaction of hydrogen peroxide with hydrogen sulphide
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the scrubbing solution consists of dilute sodium hydroxide to which enough hydrogen peroxide is added to react with the hydrogen sulfide according to the equation:
4H2O2 + H2S → H2SO4 + 4H2O
The equation shows, that 4 parts of hydrogen peroxide by weight are needed for each part of H2S present in the gas to be cleaned. Enough sodium hydroxide must be present to neutralize the sulfuric acid formed according to the equation:
2NaOH + H2SO4 → Na2SO4 + 2H2O
This indicates that for each weight part of hydrogen sulfide, approximately 2-1/2 weight parts of sodium hydroxide are needed. To accelerate the oxidation reaction small amounts of iron salts may be added, but they are not essential. The recommended quantities are 10-100 mg/l of Fe, added either as FeSO4 or the EDTA complex.
4H2O2 + H2S → H2SO4 + 4H2O
The equation shows, that 4 parts of hydrogen peroxide by weight are needed for each part of H2S present in the gas to be cleaned. Enough sodium hydroxide must be present to neutralize the sulfuric acid formed according to the equation:
2NaOH + H2SO4 → Na2SO4 + 2H2O
This indicates that for each weight part of hydrogen sulfide, approximately 2-1/2 weight parts of sodium hydroxide are needed. To accelerate the oxidation reaction small amounts of iron salts may be added, but they are not essential. The recommended quantities are 10-100 mg/l of Fe, added either as FeSO4 or the EDTA complex.
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