Production of elemental sulfur and methane from H{sub 2}S and CO{sub 2} derived from a coal desulfurization process. Quarterly technical progress report, January 1, 1995--March 31, 1995

During the sixth quarter of the project, simulations were carried out to investigate the feasibility of producing elemental sulfur and methane from hydrogen sulfide and carbon dioxide by using the overall reaction of H{sub 2}S and CO{sub 2} based on the following equation: 4 H{sub 2}S + CO{sub 2} {l_equilibrium} 2 S{sub 2} + CH{sub 4}+2 H{sub 2}O. The results indicate that two reaction zones are required to realize the above reaction. The first reaction zone should be composed of multiple stages to recover the elemental sulfur without the equilibrium limitations. With optimum temperatures in each zone, the conversion can be increased significantly. The simulation also indicates less amounts of by-products, such as COS, CS{sub 2} and SO{sub 2}. The limitation on the extraction of sulfur is directly related to the sulfur vapor pressure