Kinetics of Hot-Gas Desulfurization Sorbents for Transport Reactors. Annual Technical Progress Report for the Period October 1, 2001 to September 30, 2002

摘要

Hot-gas desulfurization for the integrated gasification combined cycle (IGCC) process has been investigated by many researchers to remove effectively hydrogen sulfide with various metal oxide sorbents at elevated temperatures. Various metal oxide sorbents are formulated with metal oxides such as Fe, Co, Zn, and Ti. Initial reaction kinetics of formulated sorbents with hydrogen sulfide is studied in the presence of various amounts of moisture and hydrogen at various reaction temperatures. The objectives of this research are to study initial reaction kinetics for a sorbent-hydrogen sulfide heterogeneous reaction system, to investigate effects of concentrations of hydrogen sulfide, hydrogen, and moisture on dynamic absorption of H(sub 2)S into sorbents, and to evaluate effects of temperature and sorbent amounts on dynamic absorption of H(sub 2)S into sorbents. Experimental data on initial reaction kinetics of hydrogen sulfide with metal oxide sorbents were obtained with a 0.83-cm(sup 3) differential reactor. The reactivity of EX-SO3 was examined in this report. This sorbent was obtained from the Research Triangle Institute (RTI). The sorbent in the form of 110 (micro)m particles are reacted with 18000-ppm hydrogen sulfide at 350 -550 degrees C. The range of space time of reaction gas mixtures is 0.069 - 0.088 s. The range of reaction duration is 4 - 180 s.