Highly Robust Diesel Oxidation Catalyst for Dual Mode Combustion System

Sumiya, Satoshi; Oyamada, Hanako; Fujita, Tetsuya Theodore.; Nakamura, Katsumi; Osumi, Kazuo; Tashiro, Yoshihisa

doi:10.4271/2009-01-0280

Cited by 10 publications

(6 citation statements)

References 14 publications

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“…On the contrary, increasing CO concentration from 530 ppm to 5780 ppm and flow rate from 24 kg/hr to 93 kg/hr will decrease CO conversion efficiency from 50% to 25%. Trends from these experiments are found to be consistent to the literature found in [5], [7], and [12]. Results from above figures have shown that these 4 factors -exhaust temperature, exhaust flow rate, CO and O2 concentration affect CO conversion efficiency.…”

Section: Fractional Factorial Designsupporting

confidence: 87%

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Optimizing CO Reductions in a Diesel Oxidation Catalyst under Diesel Dual Fuel Exhaust Conditions

Suthiprasert¹,

Limpurimongkol²,

Jirawongnuson³

et al. 2017

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Abstract.A Diesel Dual Fuel (DDF) engine is an adapted diesel engine that uses natural gas and diesel fuel as the energy source at the same time. Natural gas is mixed with air at the intake manifold while diesel fuel is injected into the combustion chamber directly to initiate the combustion process. Based on the past DDF literatures, they are indicated that Carbon Monoxide (CO) emissions were more substantial at low load conditions than those when running in diesel engine modes. The Diesel Oxidation Catalyst (DOC) that is installed to this diesel engine is, therefore, not capable to reduce CO emissions abide by to the emission regulation. Literatures also indicate that the exhaust temperature, mass flow rate, Oxygen (O2) concentration, CO concentration, as well as Propane (C3H8) concentration may affect CO conversion efficiency of the catalytic converter. In the present work, Design of Experiments (DOE) is employed to explore the behavior of various factors that affect CO reductions in the catalytic converter. Once the knowledge is founded, the optimization of CO reductions in the catalytic converter at 90% is studied extensively.Using Fractional Factorial Design for screening factors on CO conversions, it is found that the exhaust temperature, mass flow rate, O2 concentration, and CO concentration affect CO conversions of the catalytic converter significantly. Optimization of these factors, by using Box-Behnken Design, for reducing CO concentration of 6200 ppm which is the maximum CO amount emitted from the tested engine shows that 90% of CO conversion can be reached at the exhaust temperature of 200 0 C, the mass flow rate of 25 kg/h, and the oxygen concentration of 16%.

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Section: Fractional Factorial Designsupporting

confidence: 87%

“…From literature review, there are many parameters that affect CO conversion efficiency for Pt-Pd diesel oxidation catalyst (DOC) [5]. High O2 concentration will increase the efficiency, while high CO concentration will decrease the efficiency [6].…”

Section: Introductionmentioning

confidence: 99%

Optimizing CO Reductions in a Diesel Oxidation Catalyst under Diesel Dual Fuel Exhaust Conditions

Suthiprasert¹,

Limpurimongkol²,

Jirawongnuson³

et al. 2017

View full text Add to dashboard Cite

show abstract

“…In contrast, NOX emissions were mostly unaffected by fuel, engine load, or emissions control. As seen in a previous study with this engine (Jathar et al, 2017), CO and THC emissions at the idle condition were similar when run with and without emissions control suggesting that the emissions control system may be limited at idle, where the catalyst temperatures might be lower than the light off temperatures for effective oxidation of CO and THC (Sumiya et al, 2009). In Figure 2, we plot the emission factors for PM2.5, OM, and EC for all the data measured in this study.…”

Section: Gas and Particle Emissionssupporting

confidence: 64%

Measuring and modeling the primary organic aerosol volatility from a modern non-road diesel engine

Jathar

Sharma

Galang

et al. 2020

Atmospheric Environment

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“…The rate determining steps are in the equation (10), (15) and (17) for C3H8, CH4 and CO respectively. The reaction rate equations for CO, CH4, and C3H8 are in equation (32) to (34).…”

Section: Kinetic Modelmentioning

confidence: 99%

“…A typical catalytic converter is far from being a perfect solution for DF-PCCI emission problems. Literatures from (12)(13)(14)(15) has pointed out that thermal and chemical properties of the exhaust such as flow rate, specie concentrations, and temperature are significant to CH4 reductions in DOC. It is shown that high exhaust flow rate and high CH4 concentrations reduce DOC performance.…”

Section: Introductionmentioning

confidence: 99%

Investigations of Catalytic Methane Oxidation under Lean Wet Exhaust Conditions

Jirawongnuson

Suthiprasert

Aroonsrisopon

et al. 2019

IJAE

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This current research work has been focused on Methane (CH4) reduction in a Diesel Oxidation Catalyst (DOC) emitted from a Dual Fuel-Premixed Charged Compression Ignition (DF-PCCI) engine. This new alternative combustion technology is implemented on a Diesel Engine powered by both diesel fuel and natural gas in order to reduce diesel fuel usage and maintain the same thermal efficiency. However, the drawback lies in higher amount of CH4 in the exhaust that might effects Original Equipment Manufacturer (OEM)'s DOC performance. In this work, thermophysical and chemical properties of DF-PCCI exhaust such as temperature, flow rate, and specie concentrations are varied to investigate their effects on CH4 conversion efficiency in DOC. Design of Experiment (DOE) is built and tested in a Synthetic Exhaust Gas Generating System that can simulate the DF-PCCI exhaust-like conditions and all tested parameters are fully controlled. The experimental matrix is selected to cover DF-PCCI exhaust condition ranges to optimizing CH4 treatment. A kinetic model with water concentration is also investigated and compared to DOE model and experimental data. It is shown that the major factors that influence methane oxidation are exhaust flow rate, H2O concentration, and exhaust temperature (at P-value < 0.05 or at confidence level of 95%). The DOE model for predicting CH4 reductions is also generated.

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Highly Robust Diesel Oxidation Catalyst for Dual Mode Combustion System

Cited by 10 publications

References 14 publications

Optimizing CO Reductions in a Diesel Oxidation Catalyst under Diesel Dual Fuel Exhaust Conditions

Optimizing CO Reductions in a Diesel Oxidation Catalyst under Diesel Dual Fuel Exhaust Conditions

Measuring and modeling the primary organic aerosol volatility from a modern non-road diesel engine

Investigations of Catalytic Methane Oxidation under Lean Wet Exhaust Conditions

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