Simultaneous estimation of ammonia injection rate and state of diesel urea-SCR system based on high gain observer

Li, Wei; Zhang, Hong; Sun, Chuan; Yan, Fuwu

doi:10.1016/j.isatra.2021.08.002

Cited by 7 publications

(3 citation statements)

References 39 publications

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“…urea. [93][94][95] This technology competes with lean-NO x trap reduction process (LNT) 96,97 which includes a NO x trapping system in lean conditions and a regeneration step by creating artificially rich conditions thanks to fuel injection. The optimization of both systems is complex.…”

Section: Catalysis Science and Technology Reviewmentioning

confidence: 99%

What about the development of catalytic after-treatment processes as part of the transition from vehicles powered by liquid fuels to gaseous fuels

Zheng,

Decoster,

Parvulescu

et al. 2024

Catal. Sci. Technol.

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Section: Catalysis Science and Technology Reviewmentioning

confidence: 99%

What about the development of catalytic after-treatment processes as part of the transition from vehicles powered by liquid fuels to gaseous fuels

Zheng,

Decoster,

Parvulescu

et al. 2024

Catal. Sci. Technol.

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“…2N 2 + 3H 2 O), etc., while ignoring undesired reactions. [45][46][47][48] Besides, whether the SCR reaction kinetic models derived from synthetic gas test bench are feasible to apply to the actual engine SCR system is still a question, which needs further demonstration.…”

Section: Introductionmentioning

confidence: 99%

“…At present and in order to study the control problems of the SCR system, most of the reaction equations contained in the SCR model only consider the main reactions such as the standard SCR reaction, the fast SCR reaction (2NH 3 + NO + NO 2 → 2N 2 + 3H 2 O), etc., while ignoring undesired reactions. 45–48 Besides, whether the SCR reaction kinetic models derived from synthetic gas test bench are feasible to apply to the actual engine SCR system is still a question, which needs further demonstration.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the applicability of parameters identification of marine diesel engine SCR kinetic model based on Discrete-Grid algorithm

Xia

Zhu

Shreka

et al. 2023

International Journal of Engine Research

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Selective catalytic reduction (SCR) technology is the most widely used denitrification method in industry. However, the calibration of its kinetic model is very problematic due to the large number of parameters involved and the nonlinear characteristics, especially for the undesired reactions such as formation-decomposition of ammonium nitrate (AN), ammonium sulfate (AS), ammonium bisulfate (ABS), etc. In this paper, the synthetic gas test bench and the SCR system of WD10 marine diesel engine burning high-sulfur fuel oil (HSFO) and low-sulfur fuel oil (LSFO) are taken as the research objects. Firstly, based on the experimental data obtained from the synthetic gas test bench, the pre-exponential multiplier and activation energy of each reaction were identified using the Discrete-Grid algorithm. In this work, considering that the production of N2O, SO3, AN, AS, and ABS in the undesired reactions is very low, not on the same order of magnitude as that of NO and NH3, it is easy to overlook their reaction characteristics in the optimization process. We have adopted an approach that amplifies the error between the predicted concentration and the observed concentration of the species to solve this problem. Secondly, a detailed and complete SCR kinetic model was constructed. Finally, with the parameter identification results obtained from the synthesis gas bench as initial values, all the kinetic parameters of the WD10 marine engine SCR model was calibrated simultaneously using the Discrete-Grid algorithm. The results showed that the SCR kinetic model derived from the synthetic gas test bench was suitable for the real marine engine SCR system when the range of temperature and space velocity (SV) of the synthetic gas bench test is similar to that of the marine SCR system.

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Neural Network-Based Prediction of NH3 Leakage from SCR Systems for Diesel Engines

Zhu,

2024

Int.J Automot. Technol.

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Simultaneous estimation of ammonia injection rate and state of diesel urea-SCR system based on high gain observer

Cited by 7 publications

References 39 publications

What about the development of catalytic after-treatment processes as part of the transition from vehicles powered by liquid fuels to gaseous fuels

What about the development of catalytic after-treatment processes as part of the transition from vehicles powered by liquid fuels to gaseous fuels

Investigation on the applicability of parameters identification of marine diesel engine SCR kinetic model based on Discrete-Grid algorithm

Neural Network-Based Prediction of NH3 Leakage from SCR Systems for Diesel Engines

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