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An Innovative Approach to Oxidative Removal of Hydrogen Sulfide Using the Solution of Peroxo Heteropolyacid

Category: Technical Note

Volume: 17 | Issue: 5 | Pages: 1341-1346
DOI: 10.4209/aaqr.2016.12.0550
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Xinpeng Liu, Rui Wang

  • School of Environmental Science & Engineering, Shandong University, Jinan 250199, China

Highlights

The solution of peroxo phosphomolybdic acid was used for H2S removal.
The H2S removal efficiency can keep 100% for 10 h through two-stage absorption.
The absorbent can be regenerated simply by adding a small amount of H2O2 solution.
The ultimate oxidation product of H2S is SO42–.


Abstract

A new method of removing H2S using the solution of peroxo phosphomolybdic acid was developed. The results showed that the solution of peroxo phosphomolybdic acid had perfect capacity for H2S removal. A H2S removal efficiency of 100% for 10 h could be achieved by using two-stage absorption with an absorbent concentration of 0.02 mol L–1. The effect of temperature, concentration of peroxo phosphomolybdic acid and H2S on H2S removal was explored. According to the results, a high absorbent concentration, low H2S concentration and slightly excessive H2O2 are beneficial to H2S removal under relatively low temperature. The absorbent showed a perfect regeneration performance, and could be reactivated simply by adding a few drops of 30% H2O2 solution. The X-ray photoelectron spectra showed that the H2S was oxidized to SO42– finally.

Keywords

Hydrogen sulfide Oxidation Absorption Heteropoly acid Regeneratio


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