Development and Investigation of Diesel Fuel Reformer for LNT Regeneration
作者： Thomas Wittka , Volker Müller , Peter Dittmann , Stefan Pischinger
DOI: 10.1007/S40825-015-0017-8
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摘要: In the present work, an exhaust after treatment system combining Lean NOX Trap (LNT) plus bypass, passive catalyst for selective catalytic reduction (SCR), and engine independent LNT reductant supply by on-board fuel reforming was developed. To demonstrate mobile production of synthesis gas with focus on automotive application, outline reformer has been developed which is predominantly operated using gas. The concept design are described in detail. reaction process a variable superposition exothermic catalyzed partial oxidation (CPOx) endothermic steam (steam (SR)) CO2 (dry (DR)) reformation. This strong dependence operation engine’s composition intensively studied steady-state experiments test bench. Besides operating within thermal limits, control strategy designed terms low hydrocarbon emissions high energetic efficiency. comparison to pure CPOx, showed favorable behavior as well efficiency benefits up 20 % due part reaction. could achieve yield above 50 %, whereas only 10–25 % medium load 45 % be realized engine-rich operation. For investigated diesel calibrations, undesired HC emission reached percentage share reductants 15–55 %, 12 %.
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