Upcoming regulations regarding diesel engine emissions require substantial reductions in particulate matter and nitrogen oxides through aftertreatment methods. Because sulfur oxides in the exhaust greatly reduce the performance of the aftertreatment system, a dedicated trap for the removal of sulfur oxides has been considered. Most adsorbents are more effective in removing SO 3 than SO 2; hence, oxidation catalysts have been employed to maximize the concentration of SO 3 in the effluent. Although SO 2 concentrations are easily measured, SO 3 is less easily quantified. As a result, the only figure of merit for SO x trap performance has been total capacity, provided by post-characterization. In this paper, we describe a chromatographic method for the measurement of SO 2 and SO 3 adsorption in real time that provides adsorbent performance data on breakthrough capacities and sulfur slip. We also provide experimental measurements of breakthrough capacities for SO 2 and SO 3 adsorption for some common metal oxide adsorbents using this analytical system.
No takes yet. Share an insight, caveat, or question.
Li et al. (2004) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: