Modeling of SCR DeNOx Catalyst - Looking at the Impact of Substrate Attributes

Winkler, Christian; Flörchinger, Peter; Patil, M. D.; Gieshoff, J.; Spurk, Paul; Pfeifer, Marcus

doi:10.4271/2003-01-0845

Cited by 38 publications

(24 citation statements)

References 9 publications

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“…reaction (5) or (7)) as well as the global Fast SCR reaction (2) did not proceed over a V-free WO 3 /TiO 2 catalyst, thus identifying the catalytic role of vanadium redox sites in the Fast SCR mechanism. It was also proved that surface nitrate species, formed from NO 2 , are much more effective than gaseous oxygen in reoxidizing the reduced V-sites, which explains the greatly enhanced DeNOx activity with respect to the standard SCR at low temperature.…”

Section: Resultsmentioning

confidence: 94%

“…Although several car manufactures [2][3][4] are currently considering the SCR technology as a possible solution to meet the emission limits of the forthcoming legislations, few papers are available that discuss modelling of SCR monolith reactors for mobile applications [5,6]. In recent years a joint project started between Politecnico di Milano and DaimlerChrysler aimed at constructing an unsteady mathematical model of SCR converters applicable to the design and control of integrated aftertreatment systems for mobile applications.…”

Section: Introductionmentioning

confidence: 99%

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NH3-NO/NO2 SCR for diesel exhausts after treatment: mechanism and modelling of a catalytic converter

et al. 2007

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

NH3-NO/NO2 SCR for diesel exhausts after treatment: mechanism and modelling of a catalytic converter

et al. 2007

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“…The reactions and mass balances in the catalyst is modeled similarly to (Winkler et al, 2003;Van Helden et al, 2004) and is described below. In each segment NH 3 adsorption and desorption…”

Section: Selective Catalytic Reduction Catalystmentioning

confidence: 99%

Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, September 25th – 27th, 2017

2017

Linköping Electronic Conference Proceedings

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Welcome to the 58th Conference on Simulation Modelling and Optimization in Reykjavik, Iceland. Reykjavik is the northernmost and one of the smallest capital cities in the world. Although small for a capital, it is the country's largest and most populated city and with the urban area population of around 200000, it is the home of the vast majority of Iceland's people. The city is pioneer in the use of geothermal energy to provide low-cost heating and electricity. Iceland's energy consumption per capita is among the highest in the world, and the proportion of this consumption provided by renewable energy sources exceeds most other countries. The electricity is produced almost entirely from renewable energy sources, hydroelectric (70%) and geothermal (30%) and simulation, modelling and optimization are the key elements to utilize the renewable energy more efficiently.The SIMS 58 will cover broad aspects of simulation, modelling and optimization and be a technical forum for participants to further their knowledge by being exposed to diverse topics, and exchange opinions and ideas both from industry and academia in a variety of topics related to simulation, modelling and optimization. The ambition is to bring the field of applied modelling and simulation techniques of energy systems to the general public as a contributing technology for efficient and sustainable energy systems. This year, the conference program contains two keynote speakers, 53 research papers and presentations organized into 14 sessions and an excursion to a geothermal park.The focus of the conference is on simulation, modelling and optimization in a variety of applied contexts including topics such as geothermal, hydro and bio energy, oil production, automotive industry and methodology and technologies for simulation, modelling and optimization.A key component of the SIMS conference is the opportunity to socialize and make new connections. The conference offers several possibilities such as a conference dinner at Bryggjan Brugghús (Bistro and Brewery), an excursion to the Reykjanes GEOPARK and last but not least some coffee and lunch breaks.SIMS stands for the Scandinavia Simulation Society with members from five Nordic countries, Denmark, Finland, Norway, Sweden and Iceland. The goal of SIMS is to develop further the science and practice of modelling and simulation in all application areas and to be a forum for information interchange between professionals and non-professionals in the Nordic countries.Thanks to all participants, authors, keynote speakers and presenters for their contribution to this conference. I also want to acknowledge the support I have received from the conference board, program committee and the SIMS board. The support from the National energy authority, Iceland is gratefully acknowledged.Welcome, I hope you will enjoy the conference and the interactions with your colleagues and other presenter here.Magnus Excursion:The conference excursion will be on Wednesday, September 27 th , at 10:00. Resource Park in the Reykjanes pen...

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“…Winkler et al (2003) developed a one-dimensional numerical model for chemical reactions to describe the DeNO x behavior of a current commercial SCR catalyst by considering both standard and fast SCR reactions with the oxidation of NH 3 . They also carried out a parametric study by changing the concentrations of various components such as NO, NH 3 etc.…”

Section: Brazilian Journal Of Chemical Engineeringmentioning

confidence: 99%

SELECTIVE CATALYTIC REDUCTION (SCR) OF NO BY AMMONIA OVER V2O5/TiO2 CATALYST IN A CATALYTIC FILTER MEDIUM AND HONEYCOMB REACTOR: A KINETIC MODELING STUDY

Nahavandi

2015

Braz. J. Chem. Eng.

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-The present study addresses a numerical modeling and simulation based on the available knowledge of SCR kinetics for prediction of NO conversion over a V 2 O 5 /TiO 2 catalyst through a catalytic filter medium and honeycomb reactor. After introducing the NH 3 -SCR system with specific operational criteria, a reactor model was developed to evaluate the effect of various operating parameters such as flue gas temperature, velocity, NH 3 /NO molar ratio, etc., on the SCR process. Computational investigations were performed based on the proposed model and optimum operational conditions were identified. Simulation results indicate that SCR performance is substantially under the effects of reactant concentration and operating temperature, so that the concentration of unreacted ammonia emitted from reactor discharge (ammonia slip) increases significantly at NH 3 /NO ratios of more than 1.14 and operating temperatures less than 360 ºC and 300 ºC, respectively, in the catalytic filter medium and honeycomb reactor. The results also show that there are three sections in NO conversion variation versus changing temperature and the required conversion with a maximum of almost 87% and low level of ammonia slip can be achieved at the NH 3 /NO ratio of 1 and temperature range of 240-360 ºC in both reactors.

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Modeling of SCR DeNOx Catalyst - Looking at the Impact of Substrate Attributes

Cited by 38 publications

References 9 publications

NH3-NO/NO2 SCR for diesel exhausts after treatment: mechanism and modelling of a catalytic converter

NH3-NO/NO2 SCR for diesel exhausts after treatment: mechanism and modelling of a catalytic converter

Proceedings of the 58th Conference on Simulation and Modelling (SIMS 58) Reykjavik, Iceland, September 25th – 27th, 2017

SELECTIVE CATALYTIC REDUCTION (SCR) OF NO BY AMMONIA OVER V2O5/TiO2 CATALYST IN A CATALYTIC FILTER MEDIUM AND HONEYCOMB REACTOR: A KINETIC MODELING STUDY

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