NOx reduction and N2O emissions in a diesel engine exhaust using Fe-zeolite and vanadium based SCR catalysts

Cho, Chong Pyo; Pyo, Young Dug; Jang, Jae-Won; Kim, Gang Chul; Shin, Young Jin

doi:10.1016/j.applthermaleng.2016.08.118

Cited by 117 publications

(44 citation statements)

References 14 publications

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“…However, the output gas contained numerous byproducts with increasing concentrations. The N 2 O concentration rose sharply above 150 °C due to the following reaction: 4NO + 4NH 3 + 3O 2 → 4N 2 O + 6H 2 O [45]. Of note, the N 2 O concentration gradually decreased, due to the strong reduction property of NH 3 at high temperature.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3

Zhao

Wang

et al. 2018

Nanomaterials

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A two-dimensional MnAl-layered double oxide (LDO) was obtained by flash nanoprecipitation method (FNP) and used for the selective catalytic reduction of NOx with NH3. The MnAl-LDO (FNP) catalyst formed a particle size of 114.9 nm. Further characterization exhibited rich oxygen vacancies and strong redox property to promote the catalytic activity at low temperature. The MnAl-LDO (FNP) catalyst performed excellent NO conversion above 80% at the temperature range of 100–400 °C, and N2 selectivity above 90% below 200 °C, with a gas hourly space velocity (GHSV) of 60,000 h−1, and a NO concentration of 500 ppm. The maximum NO conversion is 100% at 200 °C; when the temperature in 150–250 °C, the NO conversion can also reach 95%. The remarkable low-temperature catalytic performance of the MnAl-LDO (FNP) catalyst presented potential applications for controlling NO emissions on the account of the presentation of oxygen vacancies.

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Section: Resultsmentioning

confidence: 99%

Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3

Zhao

Wang

et al. 2018

Nanomaterials

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“…Diesel engine while the internal transformation process is very difficult, so that the external technique commonly used for processing a diesel engine exhaust gas (referred to as SCR technology) [18]. SCR technology is the use of a catalyst and ammonia as a reducing agent, the reaction after a certain nitrogen oxides in diesel exhaust gas is converted into water vapor and nitrogen gas, so that nitrogen oxides in the exhaust gas can be recycled, Greatly reduce the nitrogen oxide emissions of diesel engines, thereby capable of reducing diesel exhaust pollution of the environment [19].…”

Section: The Basic Model Scr System Principlementioning

confidence: 99%

Study on Optimization Simulation of Scr Denitration System for Marine Diesel Engine

et al. 2018

Polish Maritime Research

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With the rapid development of shipbuilding industry exhaust world is also very harmful one kind of environmental issues, and the ship marine diesel engine exhaust gas is mainly produced, so in recent years it has developed a diesel engine SCR system. SCR system can control emissions of nitrogen oxides in the exhaust of vessel, furthermore air pollution can be reduced. The main goal of article was using fluent software to correct SCR system selection and flue gas flow under different size best deflector arrangement is simulated. Next goal is further optimize the structure of the SCR system.

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“…Diesel engines have been complying with strict emission regulations by employing post-combustion treatment systems such as selective catalytic reduction (SCR) and diesel particulate filters (DPF) [1][2]. As the regulations become stricter to ensure low emissions under real driving conditions, diesel engines must increase the thermal efficiency and reduce the emissions through precise combustion control without relying on the post-combustion treatment systems.…”

Section: Introductionmentioning

confidence: 99%

Development of On-Board In-Cylinder Gas Flow Model for Heat Loss Estimation of Diesel Engines

Ichiyanagi

Kojima

Joji

et al. 2018

International Journal of Industrial Research and Applied Engineering

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Diesel engines have been demanded to further increase the thermal efficiency through precise engine control under transient driving conditions, especially, it is essential to optimize the fuel injection timing and quantity cycle-by-cycle. Conventionally, fuel injection have been controlled by control maps, which resulted in large numbers of experiments and increase in cost. In order to overcome these problems, the present study focused on the model-based control and developed the onboard gas flow model, because the heat loss is affected by the turbulent intensity. Firstly, a validation of the CFD simulation is evaluated. The CFD simulation was used to validate the developed models and to determine unknown parameters used in the model. Secondly, modeling of in-cylinder gas flow is presented. To estimate the injection timing within 0.5 deg. against the target value, the heat loss must be estimated within the error range of 7.6%. Finally, as results, the error of heat loss obtained from gas flow model was 1.6%, and gas flow model fully met the requirement of tolerance range. From the viewpoint of calculation time, the calculation time of the model was 50.6 s per cycle, and thus the model is capable of the use of on-board applications.

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NOx reduction and N2O emissions in a diesel engine exhaust using Fe-zeolite and vanadium based SCR catalysts

Cited by 117 publications

References 14 publications

Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3

Enhanced Oxygen Vacancies in a Two-Dimensional MnAl-Layered Double Oxide Prepared via Flash Nanoprecipitation Offers High Selective Catalytic Reduction of NOx with NH3

Study on Optimization Simulation of Scr Denitration System for Marine Diesel Engine

Development of On-Board In-Cylinder Gas Flow Model for Heat Loss Estimation of Diesel Engines

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