Sulfur dioxide is reduced to elemental sulfur
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If about 60% of the sulfur dioxide gas is reduced to elemental sulfur, people are discussing whether there are any good process solutions.
Such a high concentration! If there is a large amount of flue gas, it can be used to produce acid; the acid value is currently over 1000!
Given such a high concentration of SO2, it is economically more sensible to recover it directly and turn it into liquid SO2, as this is much more valuable than sulfur. Think about it – there are still many people who want to recover SO2 directly from flue gas
In some places, neither acid nor sulfur dioxide is needed. After all, the cost of sulfur is roughly equivalent to that of sulfur dioxide, and it is also easier to store and transport. The method still involves reduction using water gas; it should be possible to do this.
In our country, the reduction of sulfur dioxide to elemental sulfur is mostly still in the research and development stage, with no large-scale practical application yet.