DEEP project on evaluation of diesel particulate filters at Inco’s Stobie Mine

Diesel aerosols and gases in underground mines: guide to exposure assessment and control.

“…Under these circumstances, NO 2 slip, or the unwanted emission of NO 2 , occurs. These secondary emissions of NO 2 are a major issue related to DPF/DOC systems using Pt-based catalysts [MSHA 2002;Mayer et al 2003;Conard et al 2005;Bugarski et al 2006;Czerwinski et al 2007;Johansen et al 2007]. Noble-and base-metal-catalyst formulations in DPF systems typically have minor effects on total NO X emissions [Mayer et al 2003;Warner et al 2003;Herner et al 2009;Richards and Chadderton 2003;Richards et al 2006], but may have a major impact on the split between NO and NO 2 fractions in total NO X [Czerwinski et al 2007;Johansen et al 2007;Khalek et al 2009;Richards and Chadderton 2003;Richards et al 2006].…”

“…When possible, a periodic check of emissions upstream and downstream of the system using a portable gas/DPM analyzer is recommended. [Stachulak et al 2005]. The smoke number results can be used to verify DPF failure.…”