(421g) Study of H2S Removal At High Temperature With 20%Fe2O3/Al2O3 Sorbent Applying Factorial Experimental Design Method

In gasification-based energy systems, e.g., an IGCC (Integrated Gasification Combined-Cycle) system, the coal gasification process will generate large amount of high-temperature syngas, while release H₂S, COS, CS₂and other harmful gaseous pollutants. Many developed countries in the world were devoted to research and development of high-temperature dry desulfurization technology, which can improve the thermal efficiency as well as reduce the cost of power generation and environmental protection.

In this study, iron nitrate is impregnated on porous alumina and calcinated at 973K for 6 hours to prepare the desulfurization sorbent. The sorbent is used as a high-temperature desulfurization agent for the removal of hydrogen sulfide in a fixed-bed reactor. To improve the sulfur capacity of desulfurization sorbent, this paper applies the 2⁵ factorial experiment designs that not only apply the ANOVA table and regression analysis to analyze the experimental data, but also verify the data completely by experiment step design before studying the important operational factors. Finally, the impact factors of desulfurization reaction of the main effects and the interaction effects can be identified. The 2⁵ sets experimental data via conversion reduce the impact of interaction number. From analysis obtained that the main effect is the reaction temperature (positive) and CO₂ concentration (negative). The interaction effect is the CO₂ concentration & reaction temperature.