Performance of Sulfide-Driven Fuel Cell Aerated by Venturi Tube Ejector

Hydrogen sulfide is frequently met in natural waters, like mineral springs, but mostly it found marine water with low renewal rate. The Black Sea has extremely high hydrogen content. It can be utilized different ways, the most promising one direct conversion into electricity. This result attained by a sulfide-driven fuel cell (SDFC), converting to sulfate thus releasing electric energy up 24 GJ/t. One of important problems mass transfer limitation on oxygen cathode space cell. problem solved using gas diffusion electrode or highly efficient saturation an ejector Venturi tube type. work presents experimental data laboratory-scale SDFC for sulfate, sulfite and polysulfide amounts energy. Two types aeration are tested: air blow Venturi-tube ejector. Besides pure graphite, two catalysts, i.e., cobalt spinel zirconia-doped graphite were tested as anodes. Experiments carried out at initial concentrations from 50 300 mg/L. Sulfate, thiosulfate ions detected outlet solutions electrochemical results show good agreement chemical analyses. Most efficiencies cell, 80%. practical applications this method extended other purposes, treatment polluted together utilization