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The Potential of SNCR Based NO x Reduction in a Double Compression Expansion Engine
Technical Paper
2018-01-1128
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Selective Non-Catalytic Reduction (SNCR), used to reduce the emissions of nitrogen oxides (NOx), has been a well-established technology in the power plant industry for several decades. The SNCR technique is an aftertreatment strategy based on thermal reduction of NOx at high temperatures. In the compression ignition engine application, the technology has not been applicable due to low exhaust temperatures, which makes the SCR (Selective Catalytic Reduction) system essential for efficient nitrogen oxide reduction to fulfill the environment legislation.
For a general Double Compression Expansion Engine (DCEE) the complete expansion cycle is split in two separate cycles, i.e. the engine is a split cycle engine. In the first cylinder the combustion occurs and in the second stage the combustion gas is introduced and further expanded in a low-pressure expansion cylinder. The combustion cylinder is connected with the expansion cylinder through a large insulated high-pressure tank. If an ammonia based solution is injected after the combustion cylinder, the residence time and high gas temperature in the high-pressure tank allows the Selective Non-Catalytic Reduction mechanisms to ensue. In this paper, AUS 32 vaporization efficiency was studied by injection droplet distribution measurements and CFD simulations.
The Selective Non-Catalytic Reduction concept was evaluated utilizing a 1D GT-SUITE model of a potential DCEE concept where the SNCR based mechanisms were added. Engine speed, normalized stoichiometric ratio (NSR), load and air-fuel excess ratio (λ) were swept in the 1D simulation process.
The simulation results suggest efficient vaporization of AUS 32 and the presence of SNCR mechanisms in the Double Compression Expansion Engine’s medium and high load operating points was verified with conversion efficiency above 50 % in some of the simulation cases for NSR = 1 and close to 80-100 % for NSR = 2 and NSR = 3 when the exhaust gas temperature from the combustion cylinder was in the optimal range for SNCR based reactions.
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Muric, K., Tunestal, P., Andersson, A., Andersson, L. et al., "The Potential of SNCR Based NOx Reduction in a Double Compression Expansion Engine," SAE Technical Paper 2018-01-1128, 2018, https://doi.org/10.4271/2018-01-1128.Data Sets - Support Documents
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References
- Lam , N. , Tuner , M. , Tunestal , P. , Andersson , A. et al. Double Compression Expansion Engine Concepts: A Path to High Efficiency SAE Int. J. Engines 8 4 1562 1578 2015 10.4271/2015-01-1260
- Bhavani Shankar , V. , Lam , N. , Andersson , A. , and Johansson , B. Optimum Heat Release Rates for a Double Compression Expansion (DCEE) Engine SAE Technical Paper 2017-01-0636 2017 10.4271/2017-01-0636
- Lee , S. , Gonzalez , D.M. , and Reitz , R. Stoichiometric Combustion in a HSDI Diesel Engine to Allow Use of a Three-way Exhaust Catalyst SAE Technical Paper 2006-01-1148 2006 10.4271/2006-01-1148
- Shen , M. , Tuner , M. , and Johansson , B. Close to Stoichiometric Partially Premixed Combustion -The Benefit of Ethanol in Comparison to Conventional Fuels SAE Technical Paper 2013-01-0277 2013 10.4271/2013-01-0277
- Scott Sluder , C. , Storey , J. , Lewis , S. , and Lewis , L. Low Temperature Urea Decomposition and SCR Performance SAE Technical Paper 2005-01-1858 2005 10.4271/2005-01-1858
- Zhang , X. , Zhang , R. , and Lin , X. Research on SNCR Technology in the Denitration Engineering Du W. Informatics and Management Science I. Lecture Notes in Electrical Engineering 204 London Springer 2013 10.1007/978-1-4471-4802-9_26
- Muric , K. , Tunestal , P. , and Stenlaas , O. A Fast Crank Angle Resolved Zero-Dimensional NOx Model Implemented on a Field-Programmable Gate Array SAE Int. J. Engines 6 1 2013 10.4271/2013-01-0344
- Muric , K. , Stenlaas , O. , Tunestal , P. , and Johansson , B. An In-Cycle based NO x Reduction Strategy using Direct Injection of AdBlue SAE Int. J. Engines 7 4 1984 1996 2014 10.4271/2014-01-2817
- Willand , J. , Teigeler , M. , Wirbeleit , F. , Enderle , C. et al. Selective Non-Catalytic NOx-Reduction in Diesel Engines Using Aqueous Urea SAE Technical Paper 982651 1998 10.4271/982651
- Golovitchev , V. , Montorsi , L. , Denbratt , I. , Corcione , F. et al. Numerical Evaluation of Direct Injection of Urea as NOx Reduction Method for Heavy Duty Diesel Engines SAE Technical Paper 2007-01-0909 2007 10.4271/2007-01-0909
- Krahl , J. , Tanugula , S. , and Hopf , H. Diesel Fuel Additives to Reduce NOx Emissions from Diesel Engines Operated on Diesel and Biodiesel Fuels by SNCR SAE Technical Paper 2010-01-2280 2010 10.4271/2010-01-2280
- Burström , P. , Antos , D. , Lundström , T. , and Marjavaara , B. A CFD-based evaluation of Selective Non-Catalytic Reduction of Nitric Oxide in Iron ore Grate-kiln Plants Progress in Computational Fluid Dynamics An International Journal 15 32 46 2015 10.1504/PCFD.2015.06732
- EPA Technical Bulletin: Nitrogen Oxides (NO x ), Why and How They Are Controlled 1998
- U.S. Environment Protection Agency, Office of Air Quality Planning and Standards 2007
- Chen , M. and Williams , S. Modelling and Optimization of SCR-Exhaust Aftertreatment Systems SAE Technical Paper 2005-01-0969 2005 10.4271/2005-01-0969
- Brouwer , J. , Heap , M.P. , Pershing , D.W. , and Smith , P.J. A Model for Prediction of Selective Noncatalytic Reduction of Nitrogen Oxides by Ammonia, Urea, and Cyanuric Acid with Mixing Limitations in the Presence of CO Symposium (International) on Combustion 26 2 2117 2124 1996 10.1016/S0082-0784(96)80036-1
- McBridge , B.J. NASA Glenn Coefficients for calculating Thermodynamic properties of Individual Species 2002
- Dong , G. , Morgan , R. , and Heikal , M.R. Thermodynamic Analysis and System Design of a Novel Split Cycle Engine Concept Energy 102 576 585 2016 10.1016/j.energy.2016.02.102
- Jang , C. , Choi , S. , Bae , C. , Kim , J. et al. Performance of Prototype High Pressure Swirl Injector Nozzles for Gasoline Direct Injection SAE Technical Paper 1999-01-3654 1999 10.4271/1999-01-3654
- Abe , M. , Hideharu , E. , Masahiro , S. , and Ishikawa , T. Spray Atomization Study on Multi-Hole Nozzle for Direct Injection Gasoline Engines SAE Technical Paper 2013-01-1596 2013 10.4271/2013-01-1596