Gas Hydrate Formation Process for Simultaneously Capture of CO2 and H2S

Simultaneously capture of CO2 and H2S is vital for obtaining clean fuels from fossil fuels. This work proposes the hydrate formation process for simultaneously capture of CO2 and H2S from simulated syngas with new synergic additives. The synergic additives comprises acidic gas solvent (tetramethylene sulfone (TMS)) and traditional hydrate promoter (tetra-n-butyl ammonium bromide (TBAB)). The effect of the synergic additives was evaluated based on kinetic curves, separation efficiency and gas selectivity. The results show that, with the help of the synergic additives, both CO2 or H2S could be simultaneously captured from the simulated syngas by the hydrate formation process. Furthermore, the synergic additives could not remarkably accelerate the formation rate and improve the gas storage capacity for the simulated syngas hydrate, but also enhance the selectivity of CO2 or H2S in the hydrate process.