Innovative Substrate Technology for High Performance Heavy Duty Truck SCR Catalyst Systems

Abstract

Diesel engine emissions regulations throughout the world have changed dramatically over the last 20 years, with the most stringent phase for medium/heavy duty being implemented starting 2007 -2010. The general perception is, that combination systems including PM reduction devices and NOx aftertreatment, likely SCR will be applied, hence significant additional emissions equipment will need to be added to a diesel engine. The consequences of this will be increased space for packaging and increased cost, to meet the demanding regulations.Traditional substrate technology, while developing extensively for gasoline engines by use of higher cell densities has limitations when applied to CI diesel engines. New developments in substrate and coating technology now enable considerable improvement in the efficiency and packaging space needed to meet certain limit values. A novel approach combining a continuously operating PM-reduction with advanced "turbulent" SCR-catalyst in a special system configuration has been investigated in an engine cell program with a HDDE, demonstrating the capability to approach US 2010 emission limits with an extremely compact and cost effective design. PRE-DEVELOPMENT

Review Paper on Improved Exhaust Emission Control by The Use of Cu-Zeolite Catalyst Based Catalytic Converter

“…Julie M Pardiwala et al [5] shows limited availability, cost and some working conditions have propelled the research on alternate catalyst material. Michael Rice et al [6] shows the rules and laws with regard to emission from the diesel engine that have changed in the last two decades along with the ways to reduce exhaust emission using SCR combined with soot filter. Yisun cheng et al [7] illustrates concerns regarding sulphur poisoning in the system incorporating Diesel Oxidation Catalyst for applications of diesel engine ahead of Cu/Zeolite Selective catalytic reduction (SCR) catalyst.…”

Experiences with partial-flow filters to reduce the solid particle emissions from diesel engines

“…Filter A is actually a partial-flow filter [19,20]. The design features are a metallic substrate of corrugated and perforated foils and a fleece of very fine metallic fibers acting as the actual filter medium.…”

“…Filtr A to filtr częściowego przepływu [19,20]. Wykonany jest z metalicznego substratu, składającego się z falistych i perforowanych folii oraz z włókniny powstałej z włókien metalicznych wysokiej jakości, które pełnią funkcję środka filtrującego.…”

Industrial scale 3D printed catalytic converter for emissions control in a dual-fuel heavy-duty engine

“…Utilisation of a swirl blade configuration before the monolith [21,22] has shown promising results with slight improvement in catalytic converter efficiency. Employing corrugated metallic foils with internal holes [23,24] is another approach, however the cost of metallic substrates and complexity of wash coating are the main concerns associated with this class of substrates [25].…”