Study on Desulfurization and Regeneration Performance of Nanofluid System Based on Heteropoly Compound/Ionic Liquid Solutions

Abstract

Heteropoly compounds were dissolved in ionic liquids to obtain heteropoly compound/ionic liquid solutions. SiO 2 nanoparticles with different mass ratios were introduced into the solutions described above to obtain nanofluids. The desulfurization and regeneration performances of the nanofluids have been explored by dynamic H 2 S absorption experiments. The results showed that the optimal ratio of SiO 2 nanoparticles was confirmed to be 0.05% at 150 °C and the desulfurization efficiency of the nanofluid remained above 97% at 480 min. The nanofluids exhibited lower desulfurization performance at 100 °C than that at 150 °C. It is noteworthy that heteropoly blue has a self-catalytic effect on the absorption process of H 2 S. The results of characterizations revealed that SiO 2 nanoparticles in the nanofluids were covered by heteropoly compounds and sulfur. The morphology of SiO 2 nanoparticles showed no significant change in the absorption−regeneration process. The nanofluids had stable and high desulfurization performance at high temperature and could be regenerated by air easily.