Abstract
A new liquid redox method for low sulfur containing gas treatment, with H2S concentration less than 1000mg/m3, was developed employing the heteropoly compounds of molybdenum and phosphorus by the present authors. The desulfurization characteristics of the absorbent system of vanadium substituted heteropoly acid, viz. H4PVMo11O40, were investigated by dynamic outlet-gas H2S concentration detection method. Like the aqueous solution of the parent compound, namely H3PMo12O40 or its sodium salt, H4PVMo11O40 solution can also be used as efficient absorbent for H2S removal. The absorbent system of H4PVMo11O40 solution was found to have fairly good absorption-regeneration performance, with a H2S removal rate of up to 100% in the presence of CuS as additive, hence it is promising in pollution control and resource reclamation.
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