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

Abstract

A new method of removing H 2 S using the solution of peroxo phosphomolybdic acid was developed. The results showed that the solution of peroxo phosphomolybdic acid had perfect capacity for H 2 S removal. A H 2 S 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 H 2 S on H 2 S removal was explored. According to the results, a high absorbent concentration, low H 2 S concentration and slightly excessive H 2 O 2 are beneficial to H 2 S removal under relatively low temperature. The absorbent showed a perfect regeneration performance, and could be reactivated simply by adding a few drops of 30% H 2 O 2 solution. The X-ray photoelectron spectra showed that the H 2 S was oxidized to SO 4 2-finally.

Desulfurization Performance of Rare Earth Mono-substituted Heteropoly Compounds

“…This method is simple and easy to operate, but the adsorbents have the disadvantages of poor regenerability and high running cost (Ozekmekci et al, 2015;Tian et al, 2017;Lee et al, 2019). Whereas, the wet methods, especially those utilizing aqueous solution for catalytic and oxidative desulfurization, normally possess high removal efficiency for H 2 S at lower cost (Zhai et al, 2012;Liu et al, 2017a;Zhang et al, 2018). Due to its stable structure and good redox properties, heteropoly acid is an excellent catalyst for oxidative desulfurization (Ou et al, 2001;Wang et al, 2012;Choi et al, 2014;Liu et al, 2017).…”