| 초록 |
Sulfur compounds are highly toxic, corrosive, and environmentally hazardous factors in the utilization of various fuel resources. Recently, the need of natural gas is steeply increased to produce H2 through a steam methane reforming. However, even though natural gas is pretreated, it contains a trace amount of sulfur compounds such as H2S, THT, or TBM. Since these compounds can severely deactivate the catalysts used in SMR processes, they should be removed to increase the process efficiency. Due to the difficulty of experiments and analysis for ultra-low sulfur concentration under 5 ppm, studies have been rarely conducted. This study investigated the adsorption behavior of H2S, THT, and TBM under 5 ppm on copper-impregnated activated carbon through breakthrough tests at 60 ℃ and ambient pressure. Then, the adsorption capacity of each compound was evaluated. In addition, the adsorption and reaction mechanism were elucidated by using N2 isotherms at 77 K, CO2 isotherms at 273 K, SEM-EDS, XRD, and XPS. According to the analysis results, the roles of Cu sites and carbon surface could be explained. |
