A Fast Start-Up On-Board Diesel Fuel Reformer for NOx Trap Regeneration and Desulfation

Khadiya, Navin; Crane, Sam; Huffmeyer, Chris; Taylor, Bill

doi:10.4271/2004-01-2684

Cited by 10 publications

(2 citation statements)

References 13 publications

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“…Production of hydrogen for low emission and compact combustors has become an important topic, since several feasibility studies have shown that hydrogen fuels can be utilized for low emission engines [1,2], low NO x combustors [3], and high throughput combustors [4]. In these studies, control technologies of flammability limit and flame stability with hydrogen fuels have been successfully demonstrated.…”

Section: Introductionmentioning

confidence: 98%

Optimization scheme of a rotating gliding arc reactor for partial oxidation of methane

Lee

Kim

Suk

et al. 2007

Proceedings of the Combustion Institute

141

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Section: Introductionmentioning

confidence: 98%

Optimization scheme of a rotating gliding arc reactor for partial oxidation of methane

Lee

Kim

Suk

et al. 2007

Proceedings of the Combustion Institute

141

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“…Besides, it can be used for electric power generation in an auxiliary power unit (APU), or H 2 can be added to gasoline-or diesel-fueled combustion engines for enhancement of pollutant formation and fuel consumption [1][2][3][4][5][6][7][8]. Finally, it might be applied for after treatment issues as it is done in this investigation [9][10][11][12][13][14][15][16][17][18]. The diesel fuel reformer that is discussed in this paper is part of a combined Lean NO X Trap (LNT) + selective catalytic reduction (SCR) diesel exhaust after treatment system that was described in detail by the authors in a previous paper [19].…”

Section: Introductionmentioning

confidence: 99%

Development and Investigation of Diesel Fuel Reformer for LNT Regeneration

Wittka

Müller

Dittmann

et al. 2015

Emiss. Control Sci. Technol.

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In the present work, an exhaust after treatment system combining Lean NO X Trap (LNT) plus exhaust bypass, passive catalyst for selective catalytic reduction (SCR), and engine independent LNT reductant supply by on-board exhaust fuel reforming was developed. To demonstrate the mobile production of synthesis gas with focus on automotive application, an outline fuel reformer has been developed which is predominantly operated using engine exhaust gas. The reformer concept and design are described in detail. The reaction process is a variable superposition of exothermic catalyzed partial oxidation (CPOx) and endothermic steam (steam reforming (SR)) and CO 2 (dry reforming (DR)) reformation. This strong dependence of the reformer operation on the engine's exhaust gas composition was intensively studied by steady-state experiments on an engine test bench. Besides operating the reformer within thermal limits, the control strategy is designed in terms of low hydrocarbon emissions and high energetic efficiency. In comparison to pure CPOx, exhaust gas reforming showed favorable thermal behavior as well as efficiency benefits of up to 20 % due to the endothermic part of the reaction. The reformer could achieve a reductant yield of above 50 %, whereas only 10-25 % for medium engine load and up to 45 % for high engine load could be realized by engine-rich operation. For the investigated diesel engine-rich calibrations, the undesired HC emission reached a percentage share of the reductants of 15-55 %, whereas the reformer showed only up to 12 %.

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