Questions regarding gas desulfurization
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Dear colleagues, I would like to ask how sulfur dioxide and hydrogen sulfide in raw gas are typically removed. We are currently in the planning stage of a project, and we plan to use the 888 catalyst to remove H2S; however, this catalyst cannot remove SO2. Therefore, should these two gases be removed separately, or can they be absorbed together using an alkaline solution along with 888? What adverse effects might occur if they are absorbed together? If they are removed separately, what kind of absorbent would be suitable for removing SO2? The levels of H2S and SO2 in the raw gas are relatively low, at 400 ppm and 573 mg/Nm3 respectively. Thank you!
First, SO2 is converted to H2S through hydrogenation conversion, and then desulfurization is carried out using the tannin method or the 888 method.
I agree with what was said above: if hydrogen reduction is carried out after two stages of Claus process, and then an additional coking desulfurization unit is used, the recovery rate can also reach over 99.9%.
Using tannin combined with 888 yields better results
Reply to 3# Botian: Do you use tannin for desulfurization? ?
Reply to 5# 88790043: We use Claus sulfur recovery, followed by catalytic hydrogenation, and then the exhaust gases are sent for treatment in a low-temperature methanol wash!