Oxidation
Oxidation of sulphur coumpound (mercaptans/ H2S).
At Nippon Gases we are called “The Gas Professionals” for a reason, and it’s because we’ll be able to solve any doubt.
Black liquor oxidation with pure oxygen increases productivity and reduces air pollution
Black liquors can be treated with pure oxygen to oxidise sodium sulphide up to the stable compound sodium thiosulphate. This way, it reduces emissions of Total Reduced Sulphur (TRS) in the recovery boiler. This application can also reduce the liquor heating value and increase the recovery boiler capacity.
How black liquor oxidation works
Application of pure oxigen converts sulphide sodium.
Thiosulphate sodium and decrease calorific liquor value leading to an increased productivity in the bottleneck production recovery boilers (indirect concentrators).
TRS
TRS (Total Reduced Sulfur compounds) reduction.
Shorter reaction
Saved steam evaporators. Shorter reaction and less foam generation than with air.
S and Na recovering
Increases S and Na recovering in the green liquor.
Exothermic reaction
A better use of heat generated in the exothermic reaction.
Productivity
Increased productivity 2 to 4%.
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