Gas Desulfurization by Supported Ionic Liquid Membranes (SILMs}

摘要

The separation of low concentrated sulfur compounds such as H2S, SO2 and tetrahydrothiophene (widely used as natural gas odorant) was studied by means of supported ionic liquid membranes (SILMs). Stable liquid membranes were prepared, characterized and applied in lab-scale experiments. The influence of main process parameters - sulfur concentration, pressure, temperature and water content - on the degree of desulfurization of (model) natural gas, biogas or flue gas was determined. The experimental results are in good agreement with the solution-diffusion-model. The modelling shows that an efficient deep desulfurization of natural gas for the use in peripheral fuel cell systems can be achieved.