Relevant bibliographies by topics / Selective non-catalytic reduction process (SNCR)

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  2. Dissertations / Theses
  3. Conference papers
  4. Reports

Academic literature on the topic 'Selective non-catalytic reduction process (SNCR)'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Selective non-catalytic reduction process (SNCR)"

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Cao, Qing Xi, Hui Liu, Shao Hua Wu, et al. "Numerical Study of Selective Non-Catalytic Reduction Process in Large Utility Boiler." Advanced Materials Research 732-733 (August 2013): 258–64. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.258.

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To provide a theoretical guidance for the application of selective non-catalytic reduction (SNCR) in a large capacity utility boiler, numerical study of SNCR process in a 600 MW utility boiler was performed based on computational fluid dynamics (CFD) code Fluent. Good agreement of the calculation results with the industrial test data confirms the reliability of the calculation model. It is found that the NO removal efficiency is low and NH3-slip is high, because the injected reducing agent could not mix with the flue gas adequately, and the furnace temperature is not uniform in utility boiler
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Wielgosiński, Grzegorz, Justyna Czerwińska, Olga Szymańska, and Janusz Bujak. "Simultaneous NOx and Dioxin Removal in the SNCR Process." Sustainability 12, no. 14 (2020): 5766. http://dx.doi.org/10.3390/su12145766.

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Nitrogen oxides, polychlorinated dibenzo-p-dioxins, and polychlorinated dibenzofurans are pollutants formed during thermal processes, in particular during the combustion of various fuels, including waste. They are classified as dangerous and highly toxic environmental pollutants whose emissions are strictly regulated. Many methods for reducing their emissions are known, but all involve additional production costs. For this reason, effective and cheap methods for removing these pollutants from exhaust gases are still sought. Selective non-catalytic reduction of nitrogen oxides is one of the mor
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Blejchař, Tomáš, Jaroslav Konvička, Bernd von der Heide, Rostislav Malý, and Miloš Maier. "High Temperature Modification of SNCR Technology and its Impact on NOx Removal Process." EPJ Web of Conferences 180 (2018): 02009. http://dx.doi.org/10.1051/epjconf/201818002009.

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SNCR (Selective non-catalytic reduction) Technology is currently being used to reach the emission limit for nitrogen oxides at fossil fuel fired power plant and/or heating plant and optimum temperature for SNCR process is in range 850 - 1050°C. Modified SNCR technology is able to reach reduction 60% of nitrogen oxides at temperature up to 1250°C. So the technology can also be installed where the flue gas temperature is too high in combustion chamber. Modified SNCR was tested using generally known SNCR chemistry implemented in CFD (Computation fluid dynamics) code. CFD model was focused on deta
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Zheng, Minggang, Yuankun Zhang, and Lei Shi. "Research on selective non-catalytic NOx reduction (SNCR) for diesel engine." International Journal of Heat and Technology 36, no. 3 (2018): 981–86. http://dx.doi.org/10.18280/ijht.360326.

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Modliński, Norbert. "Numerical simulation of SNCR (selective non-catalytic reduction) process in coal fired grate boiler." Energy 92 (December 2015): 67–76. http://dx.doi.org/10.1016/j.energy.2015.03.124.

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Krawczyk, Piotr. "Experimental investigation of N2O formation in selective non-catalytic NOx reduction processes performed in stoker boiler." Polish Journal of Chemical Technology 18, no. 4 (2016): 104–9. http://dx.doi.org/10.1515/pjct-2016-0078.

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Abstract Stoker fired boiler plants are common throughout Eastern Europe. Increasingly strict emission standards will require application of secondary NOx abatement systems on such boilers. Yet operation of such systems, in addition to reducing NOx emissions, may also lead to emission of undesirable substances, for example N2O. This paper presents results of experimental tests concerning N2O formation in the selective non-catalytic NOx emission reduction process (SNCR) in a stoker boiler (WR 25 type). Obtained results lead to an unambiguous conclusion that there is a dependency between the NOx
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Bae, Sang Wook, Seon Ah Roh, and Sang Done Kim. "NO removal by reducing agents and additives in the selective non-catalytic reduction (SNCR) process." Chemosphere 65, no. 1 (2006): 170–75. http://dx.doi.org/10.1016/j.chemosphere.2006.02.040.

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Xu, Shun Sheng, Bo Deng, Luo Jun Li, and Ri Sheng Huang. "Research on Mechanism in the SNCR DeNox Process." Advanced Materials Research 852 (January 2014): 3–7. http://dx.doi.org/10.4028/www.scientific.net/amr.852.3.

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The reaction mechanism of selective non-catalytic reduction on NH3-NO has been investigated experimentally in high temperature. The result has shown several basic conclusions: a) The reaction of NH3-NO is self-sustaining; b) oxygen must be involved in the reaction process of NH3-NO; c) Denitration reaction of NH3-NO in the temperature range centered at T1250K; d) the temperature window for NO removal moves to lower temperature, with adding hydrogen (H2) or hydrogen peroxide (H2O2) as well keeping the width of the window unaltered; e) the reaction is not explosive, and it takes place relatively
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Wu, Bang, Ge Pu, and Jiantai Du. "Experiment and simulation study of the effect of ethanol and compound additives on the urea-based selective non-catalytic reduction process under moderate temperature conditions." Royal Society Open Science 5, no. 10 (2018): 180969. http://dx.doi.org/10.1098/rsos.180969.

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An experiment and simulation study of the effect of using liquid additives on the selective non-catalytic reduction (SNCR) process is presented, providing a novel way for plants reducing NO X emissions. An experimental study is conducted in an entrained flow reactor, and CHEMKIN is applied for simulation study. Ethanol additive can effectively shift the temperature window of the NO X OUT process to a lower range and the NO X OUT efficiency ranges from 29 to 56% at 700–800°C. Furthermore, ethanol additive has a significant inhibitory effect on ammonia slip. Na 2 SO 4 and C 2 H 5 OH can be combi
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Zhao, Yu-Jie, Jun-Xiao Feng, Shi-Ping Huang, and Shou-Yong Hu. "Analysis and evaluation of the influence of heat storage material on coke oven flue gas exothermic process." Thermal Science, no. 00 (2019): 446. http://dx.doi.org/10.2298/tsci190715446z.

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Sufficient heat storage and proper flue-gas outlet temperature were prerequisites for selective non-catalytic reduction (SNCR) denitrification in coke oven regenerators. This work performed an energy balance analysis on the established regenerator model to obtain a new thermal storage evaluation index-Total thermal storage temperature (TTST). Furthermore, ten cases of thermal storage parameters were set to analyze the effects of thermal effusivity and thermal diffusivity on heat storage and transfer. The transient simulation results shown that the channel shape of the lattice brick limited the
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Dissertations / Theses on the topic "Selective non-catalytic reduction process (SNCR)"

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Kozlová, Romana. "Možnosti využití popílků po SNCR pro výrobu portlandského cementu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240583.

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The Master thesis deals with utilization possibilities of fly ash after selective non-catalytic reduction (SNCR) process for Portland cement preparation as a correction component to the raw material with regard to contaminated fly ash by ammonium sulphate or ammonium hydrogensulfate that is one of the products from SNCR process. Presented thesis was focused on behaviour of raw meal with ammonia hydrogensulfate contaminated fly ash after SNCR during burning of Portland clinker in simulated kiln conditions. The thesis deals with Portland clinker preparation from this kind of raw mix and it studi
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Nárovec, Jiří. "Moderní metody denitrifikace uhelných kotlů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231795.

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V současnosti musí velké energetické podniky k dodržení emisních předpisů, zejména pak vyžadovaných limitů NOx, uplatňovat denitrifikační metody. Tématem předkládané diplomové práce jsou moderních denitrifikační metody a jejich praktické uplatnění v lokálních poměrech uhelného kotle s parním výkonem 640 t.h-1 v elektrárně Počerady. Práce obsahuje rešerši moderních denitrifikačních metod používaných velkými uhelnými kotli se zaměřením zejména na sekundární denitrifikační metody. Jsou uvažovány dvě možné varianty denitrifikace – varianta 1 využívá selektivní katalytickou redukci (SCR) a varianta
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Timpanaro, Anthony. "Reduction of NOx Emissions in a Single Cylinder Diesel Engine Using SNCR with In-Cylinder Injection of Aqueous Urea." UNF Digital Commons, 2019. https://digitalcommons.unf.edu/etd/876.

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The subject of this study is the effect of in-cylinder selective non-catalytic reduction (SNCR) of NOx emissions in diesel exhaust gas by means of direct injection of aqueous urea ((NH2)2CO) into the combustion chamber. A single cylinder diesel test engine was modified to accept an electronically controlled secondary common rail injection system to deliver the aqueous urea directly into the cylinder during engine operation. Direct in-cylinder injection was chosen in order to ensure precise delivery of the reducing agent without the risk of any premature reactions taking place. Unlike direct in
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Conference papers on the topic "Selective non-catalytic reduction process (SNCR)"

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Zhang, Bo, Hongjie Xu, Xiangyu Zhang, Xiaofeng Xiang, Ning Gao, and Xu Lu. "Study on Optimization of Selective Non-Catalytic Reduction for W-Flame Boiler." In ASME 2017 Power Conference Joint With ICOPE-17 collocated with the ASME 2017 11th International Conference on Energy Sustainability, the ASME 2017 15th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2017 Nuclear Forum. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/power-icope2017-3110.

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For the optimal design of the selective non-catalytic reduction (SNCR) for a 600MW W-flame boiler, the SNCR process was simulated through method of chemical kinetics analysis and fluid dynamics analysis. The design temperature, de-nitrification efficiency in theory, position of spray gun and other parameters were determined and 46% de-nitrification rate was finally obtained. Chemical kinetics analysis, without considering the effect of reducing agent mixed with NOx, the theoretical efficiency is higher. Fluid dynamics analysis, taking into account the effect of mass transfer, the de-nitrificat
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Swanson, Larry, Wei Zhou, David Moyeda, and Christopher Samuelson. "Enhanced Selective Non-Catalytic Reduction (SNCR) for Refinery Applications: Pilot-Scale Test Data With a Hydrogen Promoter." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62038.

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Selective non-catalytic reduction technology (SNCR) is an effective and economical method of reducing NOX emissions for a wide range of industrial combustion systems. It is widely known that the traditional SNCR temperature window is centered around 1,200 to 1,255 K [1]. However, for some applications, the flue gas temperatures in boilers, oxidizers, and heaters range from 950 to 1150 K. At these lower temperatures, injection of an amine reagent into flue gas no longer actively reduces NOX, but instead passes through the system and exits as ammonia slip. Earlier studies have shown that at lowe
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Zhenzhen Guan and Dezhen Chen. "NOx removal in the selective non-catalytic reduction (SNCR) process and combined NOx and PCDD/Fs control." In 2011 IEEE Power Engineering and Automation Conference (PEAM). IEEE, 2011. http://dx.doi.org/10.1109/peam.2011.6134838.

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Koralewska, Ralf. "NOx Reduction: The Challenge for Innovative Concepts in Europe." In 19th Annual North American Waste-to-Energy Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/nawtec19-5438.

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During combustion, most of the waste’s nitrogen content is transferred to the flue gases as nitrogen oxide, NOx. The EU Waste Incineration Directive defines a maximum emission limit value for NOx of 200 mg/Nm3 as a daily average value referred to 11% O2. Based on National Emission Ceilings (NEC) defined by the Gothenburg Protocol, it can be expected that the limit values for NOx in the EU will become even more stringent. In some European countries (e.g. The Netherlands, Austria, Switzerland) a lower emission limit has already been introduced. Selective Catalytic Reduction (SCR) technologies ar
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Sigg, Fred, Roland Halter, and Peter Chromec. "DyNOR™ DeNOx Performance Confirmed in Further MSW Plants." In 18th Annual North American Waste-to-Energy Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/nawtec18-3504.

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Von Roll Inova’s innovative new SNCR process is up to the task. This new approach takes the well known Selective non-catalytic reduction process to new heights (lows). By monitoring process conditions very closely and implementing a quick-reacting, highly precise mechanical system for distribution of the reducing agent, emissions can be limited to levels comparable to those demonstrated by SCR. Von Roll Inova’s DyNOR™ (Dynamic NOx Reduction) process takes advantage of fast and precise infrared pyrometer measurements in the exact locations where reagent is needed. Coupled with a patented distri
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Dainoff, Alexander S., and Dennis Anacker. "The Design and Operation of an Advanced NOx Control System on the New 636TPD MWC at the Lee County WTE Facility." In 17th Annual North American Waste-to-Energy Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/nawtec17-2322.

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In September of 2007, a new 636TPD Municipal Waste Combustor was brought on line at the Lee County WTE Facility in Fort Myers, FL operated by Covanta Energy. This unit was the first new Waste to Energy unit built in the United States in a number of years and included a lower permitted daily average NOx emissions requirement of 110ppm @ 7%O2 while maintaining ammonia slip to less than 10ppm. To meet this new stringent NOx emissions requirement, the boiler was designed with advanced combustion controls including Flue Gas Recirculation combined with a urea based Selective Non-Catalytic Reduction
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Yang, Wenming, Hui An, Jing Li, Dezhi Zhou, and Markus Kraft. "Impact of Urea Direct Injection on NOx Emission Formation of Diesel Engines Fueled by Biodiesel." In ASME 2015 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/icef2015-1059.

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There are many NOx removal technologies: exhaust gas recirculation (EGR), selective catalytic reduction (SCR), selective non-catalytic reduction (SNCR), miller cycle, emulsion technology and engine performance optimization. In this work, a numerical simulation investigation was conducted to explore the possibility of an alternative approach: direct aqueous urea solution injection on the reduction of NOx emissions of a biodiesel fueled diesel engine. Simulation was performed using the 3D CFD simulation software KIVA4 coupled with CHEMKIN II code for pure biodiesel combustion under realistic eng
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Gesell, Greg H., Stephen Langham, Robert L. Margolis, John R. Nelson, and Joshua R. Miller. "H-POWER Facility Expansion." In 19th Annual North American Waste-to-Energy Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/nawtec19-5426.

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The City and County of Honolulu on the Island of Oahu in the Hawaiian chain has been taking steps to reduce the need for landfilling and to continue to be self-sufficient for waste disposal. For an island, having the capacity to process all of its waste is crucial and producing power helps reduce reliance on imported fossil fuels. The City and County relies upon its waste-to-energy facility to manage the waste stream. The existing H-POWER Waste-to-Energy (WTE) Facility, which has been in operation for about twenty years, is a 2,000 ton-per-day (tpd) refuse derived fuel (RDF) two-unit plant wit
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Timpanaro, Anthony, and John Nuszkowski. "Reduction of NOx in a Single Cylinder Diesel Engine Emissions Using Selective Non-Catalytic Reduction (SNCR) with In-Cylinder Injection of Aqueous Urea." In 14th International Conference on Engines & Vehicles. SAE International, 2019. http://dx.doi.org/10.4271/2019-24-0144.

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Sereika, Titas, Kęstutis Buinevičius, and Adolfas Jančauskas. "Comparison of NOx Emissions Decreasing Methods for Biofuel Boilers." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.047.

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The main idea of research is to figure out the emissions of nitrogen oxides reduction using various type of reduction methods. In experiments were used NOx reduction methods: high CO emissions generation, flue gas recirculation, water and water vapor supply, selective non-catalytic reduction (SNCR), and SNCR with flammable additive. This study presents emission and combustion results obtained burning furniture production waste which generates higher rate of NOx emissions. The result of research shows, that CO emission has the biggest impact factor -on reducing NOx emission. Burning fuel in com
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Reports on the topic "Selective non-catalytic reduction process (SNCR)"

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Urbas, Jerry B. HYBRID SELECTIVE NON-CATALYTIC REDUCTION (SNCR)/SELECTIVE CATALYTIC REDUCTION (SCR) DEMONSTRATION FOR THE REMOVAL OF NOx FROM BOILER FLUE GASES. Office of Scientific and Technical Information (OSTI), 1999. http://dx.doi.org/10.2172/789208.

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