Numerical Simulation Of Surfur Transformation And Distribution During Oil Shale Retorting

Oil shale is a kind of significant unconventional petroleum resources, which isusually regarded as the substitute of petroleum in the future. Governments have paidgreat attention to this fossil fuel as its tremendous reserve, and achieving clean andeffective oil shale utilization will play a crucial role in overcoming the global energycrisis. However, the noxious gas H2S generated during oil shale retorting pollutessurrounding environment and increases health risk. A numerical model wasestablished according to experimental data for the research on the releasecharacteristic of Sulfide.The sulfur release of oil shale in the dry distillation process is researched from atheoretical perspective. The migration of sulfur rules are dynamics analyzed, andsulfur release characteristics in dry distillation process is simulated by using Aspenplus. The simulation results are drawn, which agrees with the experimental datethrough contrast analysis. So it provides the theory basis for researching the sulfurrelease characteristics of oil shale in the dry distillation process.Software Aspen Plus is used for the calculation, and its results basically complywith that of experiment. The analysis of final retorting temperature and pressure onthe release amount of hydrogen sulphur release rate has been done, and thedistribution in products is conducted. The model calculation results are close toexperimental data, thus can provide promising references for the conversion anddistribution of sulfur during oil shale retorting.When in low temperature, the amount of hydrogen sulfide and retorting gasesboth increase as the temperature increases. When the temperature is above550℃, ithas less effect on the release of the gases. And when the temperatuer is beyond700℃,the curve tends to be gentle as the gases are no longer to escape. And as the pressure,as soon as the temperature is beyond400℃, those who has a higher pressure releasesmore hydrogen sulfide than the lower ones. However, after the retorting temperature is over800℃, the pressure can not affect the amount of hydrogen sulfide. The resultcan be helpful for the simulation of over pressure retorting.