Modeling Sulfuric Acid Condensation in Diesel Engine EGR Coolers

McKinley, Thomas L.

doi:10.4271/970636

Cited by 36 publications

(24 citation statements)

References 2 publications

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“…Sulfates that stick to particulates result from the increased concentrations of SO 2 and SO 3 gas, and sulfurous (H 2 SO 3 ) and sulfuric acid (H 2 SO 4 ). Hence, they are all highly corrosive and a likely reason for corrosion problems observed on some engines [2]. While previous work has identified the problem, additional insight is needed for generating a full understanding about the mechanisms and magnitude of corrosive effects.…”

Section: Introductionmentioning

confidence: 99%

“…The description of the experimental setup, including the condensate collection apparatus, is given next. This is followed by the condensate analysis technique for determining the concentration of sulfuric acid and indirect detection of SO 2 , and the discussion of results. The paper ends with conclusions and recommendations for a possible extension of the study.…”

Section: Introductionmentioning

confidence: 99%

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Impact of High Sulfur Military JP-8 Fuel on Heavy Duty Diesel Engine EGR Cooler Condensate

Mosburger¹,

Fuschetto²,

Assanis³

et al. 2008

SAE Int. J. Commer. Veh.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of High Sulfur Military JP-8 Fuel on Heavy Duty Diesel Engine EGR Cooler Condensate

Mosburger¹,

Fuschetto²,

Assanis³

et al. 2008

SAE Int. J. Commer. Veh.

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“…The fraction of the components is estimated using formulas of McKinley [18]. An ideal gas approach is used.…”

Section: Condensation Modelmentioning

confidence: 99%

“…The temperature difference between bulk flow and the surfaces was detected as main criteria for condensation behavior. Based on an analogous approach McKinley [18] developed a model to estimate the amount water -sulfuric acid deposition of in both regimes. In order to calculate the dew point of water and sulfuric acid this modelling approach, however, uses empirical formulas of Abel [19].…”

Section: Introductionmentioning

confidence: 99%

Condensation-Fouling Interaction in Low-Temperature EGR-Coolers

Reißig

Hoppe

Buchholz

et al. 2014

MATEC Web of Conferences

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EGR cooling is a worthwhile technology capable of reducing NOx-emissions and increasing the efficiency of CI engines. Challenges arise when low-temperature cooling is applied with high fuel sulfur contents. The resulting sulfuric acid condenses in conjunction with the water of the exhaust gas and gives rise to corrosion of coolers and engine components. Additionally, fouling of the EGR cooler is exacerbated by the condensation of acidic components compromising EGR performance. In order to gain a better understanding of the underlying processes a combined experimental and model-based approach is presented. Tests of two different EGR-cooler concepts under various conditions showed a strong influence of the fuel sulfur content on fouling and condensation. The one-dimensional cooler model developed alongside these experiments consists of an activity coefficient model (NRTL) of the binary system water -sulfuric acid and a condensation model that allows for simulating the coupled condensation of both vapor components. Comparison of experimental fouling and simulated condensation results show good agreement in interpreting critical fouling phenomena that occur at temperatures in between the acid-water dew point and the dew point of pure water.

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“…Furthermore, the production of sulfuric acid from fuel sulfur has detrimental effects on the durability of EGR systems as well [40]. Aside from influencing particulate emissions and its detrimental impact on specific engine subsystems, fuel sulfur is not known to have any significant effect on regulated gaseous engine-out emissions [37].…”

Section: Sulfurmentioning

confidence: 99%

Emissions and In-Cylinder Combustion Characteristics of Fischer-Tropsch and Conventional Diesel Fuels in a Modern CI Engine

Sappok

Llaniguez

Acar

et al. 2005

ASME 2005 Internal Combustion Engine Division Fall Technical Conference (ICEF2005)

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Increasingly stringent emissions regulations, rising oil prices, and an increased focus on environmental awareness are driving the search for clean, alternative fuels. Derived from natural gas, coal, and even biomass Fischer-Tropsch (FT) fuels are one such alternative. The inherently clean nature of FT diesel coupled with the fact that FT diesel exhibits similar physical properties to those of conventional diesel make FT diesel an ideal candidate as both a blending agent with and eventual replacement for conventional petroleum-based diesel fuels.The potential for emissions reduction with FT diesel fuels in laboratory engine tests and on-road vehicle tests is well documented. While a number of chemical and physical characteristics of FT fuels have been attributed to the observed reduction in emissions, the actual effects of both the fuel properties and in-cylinder combustion characteristics in modern diesel engines are still not well understood. In this study a 2002, six-cylinder, 5.9 liter, Cummins ISB 300 diesel engine, outfitted with an in-cylinder pressure transducer, was subjected to a subset of the Euro III 13-mode test cycle under steadystate operating conditions. Emissions and in-cylinder pressure measurements were conducted for neat FT diesel, low sulfur diesel (LSD), ultra-low sulfur diesel (ULSD), and a blend of FT/LSD. The experimental results show a significant reduction in regulated emissions with the neat FT fuel and a more than proportional reduction in particulate emissions for the blend. In order to provide further insight into the emissions behavior of the fuels, combustion characteristics were determined from a heat release analysis based on the in-cylinder pressure measurements. In addition, a detailed chemical analysis of the fuels and particulate emissions was carried out. The differences in the measured combustion characteristics and fuel properties were compared to the emissions variations between the fuels studied, and an explanation for the observed emissions behavior of the fuels was developed.

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Modeling Sulfuric Acid Condensation in Diesel Engine EGR Coolers

Cited by 36 publications

References 2 publications

Impact of High Sulfur Military JP-8 Fuel on Heavy Duty Diesel Engine EGR Cooler Condensate

Impact of High Sulfur Military JP-8 Fuel on Heavy Duty Diesel Engine EGR Cooler Condensate

Condensation-Fouling Interaction in Low-Temperature EGR-Coolers

Emissions and In-Cylinder Combustion Characteristics of Fischer-Tropsch and Conventional Diesel Fuels in a Modern CI Engine

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