Kinetics of Direct Oxidation of H(sub 2)S in Coal Gas to Elemental Sulfur. Annual Technical Progress Report for the Period October 1, 2003 to September 30, 2004

摘要

The direct oxidation of H(sub 2)S to elemental sulfur in the presence of SO(sub 2) is ideally suited for coal gas from commercial gasifiers with a quench system to remove essentially all the trace contaminants except H(sub 2)S. This direct oxidation process has the potential to produce a super clean coal gas more economically than both conventional amine-based processes and the hot-gas desulfurization using regenerable metal oxide sorbents followed by Direct Sulfur Recovery Process. The objective of this research is to support the near- and long-term process development efforts to commercialize this direct oxidation technology. The objectives of this research are to measure kinetics of direct oxidation of H(sub 2)S to elemental sulfur in the presence of a simulated coal gas mixture containing SO(sub 2), H(sub 2), and moisture, using 160-(micro)m C-500-04 alumina catalyst particles and a micro bubble reactor, and to develop kinetic rate equations and model the direct oxidation process to assist in the design of large-scale plants.