Emissions of Organic Species from a Nonroad Vanadium-Based SCR Aftertreatment System

Liu, Z. Gerald; Ottinger, Nathan; Cremeens, Christopher M.; Murray, A. J.; McGuffin, Dana L.

doi:10.4271/2015-01-2904

Cited by 3 publications

(4 citation statements)

References 16 publications

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“…Overview of organic emissions Figure 2 shows percent reductions of composite organic emissions achieved by the aftertreatment configurations. Some of these reductions have been previously reported (Liu et al 2014(Liu et al , 2015a(Liu et al , 2015b, but they are included here for completeness. Clearly, all three aftertreatment configurations substantially reduce organic emissions in comparison with engine-out levels.…”

Section: Resultsmentioning

confidence: 99%

“…These diaromatics were likely associated with the aromatic fraction of the ULSD fuel utilized in this study. The detailed fuel properties have previously been shared (Liu et al 2015a), and the measured diaromatic content was 2.2% by mass. Overall percent reductions of aromatics by the aftertreatment systems exceeded 80% for both the NRTC and NRSC cycles.…”

Section: Aromaticsmentioning

confidence: 99%

“…2 ULSD fuel with 6 ppm of sulfur and Valvoline Premium Blue 15W-40 lubrication oil. Detailed fuel properties have previously been reported (Liu et al 2015a).…”

Section: Engine and Aftertreatmentmentioning

confidence: 99%

“…Furthermore, unregulated emissions, including a broad spectrum of organic species, were 50% to 99% lower than levels emitted from 2007 technology engines evaluated during ACES Phase I Merritt 2009, 2011). Whereas the ACES Phase I and II work was conducted with on-highway diesel engines, more recent studies have been undertaken to understand the impact of state-of-the-art nonroad diesel engine and aftertreatment technologies on both regulated and unregulated emissions (Liu et al 2014(Liu et al , 2015a(Liu et al , 2015b. The present work is a continuation of this ongoing effort to better understand and document emissions from modern nonroad engines.…”

Section: Introductionmentioning

confidence: 99%

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Gas-phase and semivolatile organic emissions from a modern nonroad diesel engine equipped with advanced aftertreatment

Liu

Eckerle

Ottinger

2018

Journal of the Air & Waste Management Association

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U.S. Tier 4 Final and Euro Stage IV and V regulations for nonroad compression-ignition engines have led to the development of exhaust aftertreatment technologies optimized for nonroad engines and duty cycles. In this study, several aftertreatment configurations consisting of state-of-the-art diesel oxidation catalysts (DOCs), diesel particulate filters (DPFs), copper (Cu) zeolite- and vanadium-based selective catalytic reduction (SCR) catalysts, and ammonia oxidation (AMOX) catalysts are evaluated using both nonroad transient (NRTC) and steady (8-mode NRSC) cycles in order to understand both component- and system-level effects of diesel aftertreatment on gas-phase, semivolatile, and particle-phase and particle-bound unregulated organic emissions. Organic emissions reported in this work include total hydrocarbon (THC), n-alkanes, branched alkanes, saturated cycloalkanes, aromatics, aldehydes, ketones, hopanes, steranes, and soluble organic fraction (SOF). Brake-specific emissions are reported for four configurations, including engine-out, DOC+CuZ-SCR+AMOX, V-SCR+AMOX, and DOC+DPF+CuZ-SCR+AMOX, and conversion of engine-out emissions is reported for the three aftertreatment configurations. Mechanisms responsible for the reduction of organic species are discussed in detail. This summary of emissions from a current nonroad diesel engine equipped with advanced aftertreatment can be used to more accurately model the impact of anthropogenic emissions on the atmosphere with tools such as the U.S. Environmental Protection Agency's Motor Vehicle Emissions Simulator (MOVES2014a) model. Implications: Anthropogenic emissions are a source of significant human health and environmental risk. This study, focused on the treatment of exhaust emissions from a modern nonroad diesel engine with a variety of aftertreatment configurations, examines the impact that human industrial activity can have on air pollution. In particular, we focus on the remediation of gas-phase and semivolatile organic emissions by emission reduction technologies. This detailed summary of emissions from a current nonroad diesel engine equipped with advanced aftertreatment can be used to more accurately model the impact of anthropogenic emissions on the atmosphere with tools such as the U.S. Environmental Protection Agency's MOVES2014a model.

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Section: Resultsmentioning

confidence: 99%

Section: Aromaticsmentioning

confidence: 99%

“…2 ULSD fuel with 6 ppm of sulfur and Valvoline Premium Blue 15W-40 lubrication oil. Detailed fuel properties have previously been reported (Liu et al 2015a).…”

Section: Engine and Aftertreatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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