caa a22 4500 463253043 CHVBK 20180405153346.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10562-007-9101-1 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9101-1 A NO x trap for low-temperature lean-burn-engine applications [Elektronische Daten] [Lifeng Xu, George Graham, Robert McCabe] A NO x trap that uses only high-surface-area alumina as the NOx-storage material appears to provide significant advantages over the conventional baria-based trap for exhaust-gas after-treatment in low-temperature exhaust (∼250°C) characteristic of light-duty diesel-powered vehicles operating at low speed/load conditions. In particular, an alumina trap provides better low-temperature NO x conversion and also allows more efficient de-sulfurization than a baria-based trap in laboratory evaluations. Both of these features are ascribed to the difference in basicity of the NO x -storage materials, which leads to thermally less stable nitrate (nitrite) and sulfate compounds in the case of alumina compared to conventional traps with high levels of alkali or alkaline-earth metal oxides. Further studies, extending the laboratory experiments to engine and vehicle evaluations, are still needed, however, in order to fully assess the true potential of the alumina trap. Springer Science+Business Media, LLC, 2007 LNT nationallicence alumina based LNT nationallicence lean burn nationallicence diesel exhaust nationallicence de-SO x nationallicence Xu Lifeng Chemical Engineering Department, Ford Research and Innovation Center, 48121, Dearborn, MI, USA aut Graham George Chemical Engineering Department, Ford Research and Innovation Center, 48121, Dearborn, MI, USA aut McCabe Robert Chemical Engineering Department, Ford Research and Innovation Center, 48121, Dearborn, MI, USA aut Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 115/3-4(2007-06-01), 108-113 1011-372X 115:3-4<108 2007 115 10562 https://doi.org/10.1007/s10562-007-9101-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9101-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Xu Lifeng Chemical Engineering Department, Ford Research and Innovation Center, 48121, Dearborn, MI, USA aut NATIONALLICENCE 700 1- Graham George Chemical Engineering Department, Ford Research and Innovation Center, 48121, Dearborn, MI, USA aut NATIONALLICENCE 700 1- McCabe Robert Chemical Engineering Department, Ford Research and Innovation Center, 48121, Dearborn, MI, USA aut NATIONALLICENCE 773 0- Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 115/3-4(2007-06-01), 108-113 1011-372X 115:3-4<108 2007 115 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer