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000893351 1001_ $$00000-0002-0179-9921$$aSchönebaum, Simon$$b0
000893351 245__ $$aComposition/Performance Evaluation of Lean NOx Trap Catalysts for Coupling with SCR Technology
000893351 260__ $$aWeinheim$$bWILEY-VCH Verlag$$c2021
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000893351 520__ $$aThe washcoat composition and the catalytic properties of two commercially available lean NOx traps (LNTs) were investigated. Both catalysts contained nominally the same NOx storage and catalytic materials but differed strongly in their amount and activity as well as in the composition of their layered washcoat architecture. In lean-rich cycle experiments under realistic engine-out gas compositions using a laboratory gas test bench, the LNTs showed comparable NOx storage behavior. At temperatures below 250 °C, the lean phase durations last up to 300 s until 50 % of the NOx storage capacity is reached. The simultaneously calculated NOx storage efficiencies drop rapidly below 35 %, resulting in a high NOx slip. Strong variations were observed in N2O and NH3 selectivity and in CO slip during regeneration of both LNTs caused by the different oxygen storage capacity (OSC), water gas shift (WGS) activity and rhodium distribution in the catalytic layers. Based on the obtained results, proposals were made to optimize the storage and regeneration performance, leading to highly efficient LNT catalysts for coupling with a downstream SCR catalyst.
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000893351 7001_ $$0P:(DE-Juel1)129189$$aDornseiffer, Jürgen$$b1$$eCorresponding author$$ufzj
000893351 7001_ $$0P:(DE-HGF)0$$aMauermann, Peter$$b2
000893351 7001_ $$00000-0002-6082-738X$$aWolkenar, Bernd$$b3
000893351 7001_ $$00000-0001-5956-5848$$aSterlepper, Stefan$$b4
000893351 7001_ $$0P:(DE-Juel1)129810$$aWessel, Egbert$$b5$$ufzj
000893351 7001_ $$aIskandar, Riza$$b6
000893351 7001_ $$0P:(DE-Juel1)130824$$aMayer, Joachim$$b7$$ufzj
000893351 7001_ $$0P:(DE-Juel1)131029$$aWeirich, Thomas E.$$b8
000893351 7001_ $$0P:(DE-HGF)0$$aPischinger, Stefan$$b9
000893351 7001_ $$0P:(DE-Juel1)161591$$aGuillon, Olivier$$b10$$ufzj
000893351 7001_ $$0P:(DE-HGF)0$$aSimon, Ulrich$$b11
000893351 773__ $$0PERI:(DE-600)2501161-3$$a10.1002/cctc.202001761$$gVol. 13, no. 7, p. 1787 - 1805$$n7$$p1787 - 1805$$tChemCatChem$$v13$$x1867-3899$$y2021
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