Investigation on the effects of non-uniform porosity catalyst on SCR characteristic based on the field synergy analysis

Zhang, Zhiqing; Ye, Jiedong; Lv, Junshuai; Xu, Wence; Tan, Dongli; Jiang, Feng; Huang, Huiqiong

doi:10.1016/j.jece.2021.107056

Cited by 40 publications

(14 citation statements)

References 54 publications

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“…Due to the global energy crisis [56][57][58][59][60] and environmental problems [61][62][63][64][65][66], the development of diesel engines is also facing great challenges. In this paper, it is studied the effects of pre-injection timing and pre-injection mass ratio on the combustion and emission characteristics of a diesel/methanol/n-butanol blended fuel engine using computational fluid dynamics and a chemical dynamics model.…”

Section: Discussionmentioning

confidence: 99%

Effect of Pre-Injection on Combustion and Emission Characteristics of a Diesel Engine Fueled with Diesel/Methanol/n-Butanol Blended Fuel

Wang

2021

Processes

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In this study, the combustion and emission characteristics of a diesel/methanol/n-butanol blended fuel engine with different pre-injection timings and pre-injection mass ratios were investigated by a computational fluid dynamics (CFD) model. The CFD model was verified by the measured results and coupled with a simplified chemical kinetics mechanism. Firstly, the corresponding three-dimensional CFD model was established by CONVERGE software and the CHEKMIN program, and a chemical kinetic mechanism containing 359 reactions and 77 species was developed. Secondly, the combustion and emission characteristics of the diesel engine with different diesel/methanol/n-butanol blended fuels were analyzed and discussed. The results showed that increases in the pre-injection timing and the pre-injection mass ratio could increase cylinder pressure and cylinder temperature and decrease soot, HC, and CO emissions. At 100% load, the maximum cylinder pressures at the start of pre-injection timing from −15 °CA to −45 °CA, were 7.71, 9.46, 9.85, 9.912, and 9.95 MPa, respectively. The maximum cylinder pressures at pre-injection fuel mass ratios from 0.1 to 0.9 were 7.98, 9.10, 9.96, 10.52, and 11.16 MPa, respectively. At 50% load, with increases of the pre-injection timing and pre-injection fuel mass ratio, the soot emission decreased by 7.30%, 9.45%, 27.70%, 66.80%, 81.80% and 11.30%, 20.03%, 71.32%, 83.80%, 93.76%, respectively, and CO emissions were reduced by 5.77%, 12.31%, 22.73%, 53.59%, 63.22% and 8.29%, 43.97%, 53.59%, 58.86%, 61.18%, respectively. However, with increases of the pre-injection timing and pre-injection mass ratio, NOx emission increased. In addition, it was found that the optimal pre-injection timing and optimal pre-injection mass ratio should be −30 °CA and 0.5, respectively. Therefore, through this study we can better understand the potential interaction of relevant parameters and propose pre-injection solutions to improve combustion and emission characteristics.

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Section: Discussionmentioning

confidence: 99%

Effect of Pre-Injection on Combustion and Emission Characteristics of a Diesel Engine Fueled with Diesel/Methanol/n-Butanol Blended Fuel

Wang

2021

Processes

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“…The effect of using B20 biodiesel is the second-best scheme. NO x emission of diesel engine is related to combustion temperature and oxygen content in the oil-gas mixture during combustion (i.e., high-temperature oxygen enrichment condition) [17,18]. The use of biodiesel makes the injection occur earlier and leads to an increase in NO x emission; therefore, the more biodiesel content, the more NO x emission.…”

Section: Optimization Analysis Of 16v265h Diesel Enginementioning

confidence: 99%

“…The design of intake and exhaust systems can improve volumetric efficiency, so as to provide better torque and horsepower at specific engine speeds, which is necessary [16]. Many experts and scholars have conducted a lot of research and put forward many new technologies to improve engine combustion [17][18][19]. Therefore, when developing new technologies [20,21], it has become a challenge to improve the performance of automotive internal combustion engines, decide to use fuel better [22], and even seek the actual performance of such engines under transient and steady-state conditions [23].…”

Section: Introductionmentioning

confidence: 99%

Optimization Analysis of Locomotive Diesel Engine Intake System Based on Matlab-Simulink and GT-Power

et al. 2022

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In this paper, based on the coupling calculation of Simulink software and GT-Power software, an Optimizer model method was proposed for a 16V265H diesel engine to study the effects of different ratios of biodiesel (B0, B10, and B20) on the performance of a 16V265H diesel engine at 1000 rpm and 75% load. Firstly, the four parameters of diesel engine power, BSFC, soot emission, and NOx emission were taken as the result variables of the optimization model. Taking the intake and exhaust timing of the diesel engine as the independent variable of the optimization model, the maximum power, minimum BSFC, and minimum diesel engine emission were studied and analyzed. Finally, the performance parameters were comprehensively analyzed to determine the best intake and exhaust valve timing. Moreover, based on the model optimization, the diesel engine’s BSFC and power performance were compared, and the optimal intake timing scheme for the diesel engine with different biodiesel ratios at 75% operating conditions was obtained. The results showed that the maximum power, optimum BSFC, and minimum emissions of the 16V265H diesel engine with different ratios of biodiesel and different intake valve timing angles were also different. Under 75% load conditions, the BSFC reduction rate was up to 6.32%, and the power increase rate was up to 5.87%. In addition, by optimizing the model with B10 biodiesel and the intake valve timing close to 202°CA and the exhaust valve timing close to 98°CA, the diesel engine had the lowest NOx emission; with B10 biodiesel and the intake timing at 180°CA, the diesel engine had the lowest BSFC; and with B10 biodiesel and the intake valve timing close to 179.5°CA, the diesel engine had the maximum power. In conclusion, the diesel engine is best with B10 biodiesel. This research method can provide a reference for implementing variable intake system technology for the 16V265H diesel engine.

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“…While pursuing economy and power, environmental protection performance is also very important [2]. In this paper, the 16V265H diesel engine will be taken as the research object [3,4], and the research will be carried out from three aspects of diesel power, economy, and emission performance, especially the optimization of soot and nitrogen oxide (NO x ) emissions [5].…”

Section: Introductionmentioning

confidence: 99%

Study on Performance of Locomotive Diesel Engine Fueled with Biodiesel Using Two Miller Cycle Technologies

Jiang

Zhou

et al. 2022

Processes

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In this paper, the simulation model was established based on GT-Power software, and a scheme using the Miller cycle based on biodiesel was proposed. Taking diesel engine 16V265H as the research object, the accuracy of the simulation model was verified by experiments. Combined with the comparison of physical and chemical characteristics of biodiesel and the experimental analysis of biodiesel under three different combinations, it was concluded that low ratio biodiesel was the best choice to meet the power, economy, and emission performance of diesel. Through the simulation scheme of the two Miller cycles for pure diesel (B0) and biodiesel (B10) under different load conditions at 1000 rpm, the NOx emission performance of pure diesel in a Miller cycle was significantly improved. On this basis, the comprehensive performance of the two Miller cycles was compared with biodiesel. The results showed that both the Miller cycles could reduce NOx emission. Combined with other key performances of a diesel engine, the best scheme to improve the performance of the diesel engine was to burn B10 biodiesel and overlap angle the Miller cycle of the variable valve at 30 °CA. The scheme has guiding significance for the application of the 16V265H diesel engine.

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Investigation on the effects of non-uniform porosity catalyst on SCR characteristic based on the field synergy analysis

Cited by 40 publications

References 54 publications

Effect of Pre-Injection on Combustion and Emission Characteristics of a Diesel Engine Fueled with Diesel/Methanol/n-Butanol Blended Fuel

Effect of Pre-Injection on Combustion and Emission Characteristics of a Diesel Engine Fueled with Diesel/Methanol/n-Butanol Blended Fuel

Optimization Analysis of Locomotive Diesel Engine Intake System Based on Matlab-Simulink and GT-Power

Study on Performance of Locomotive Diesel Engine Fueled with Biodiesel Using Two Miller Cycle Technologies

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