[논문]Study on the thermal decomposition rate of ammonium carbamate for a diesel NOx reducing agent-generating system

Kim, Youngmin; Raza, Hassan; Lee, Sangho; Kim, Hongsuk

doi:10.1016/j.fuel.2020.117306

[해외논문] Study on the thermal decomposition rate of ammonium carbamate for a diesel NOx reducing agent-generating system

Fuel, v.267, 2020년, pp.117306 -

Kim, Youngmin (Environment & Energy Mechanical Engineering, University of Science and Technology) , Raza, Hassan (Environment & Energy Mechanical Engineering, University of Science and Technology) , Lee, Sangho (Engine Research Lab, Korea Institute of Machinery & Materials) , Kim, Hongsuk (Environment & Energy Mechanical Engineering, University of Science and Technology)

Abstract ▼ AI-Helper

Abstract Ammonium carbamate (AC) is a substance that exists in solid state at room temperature and decomposes into ammonia and carbon dioxide upon heating. In this study, AC was thermally decomposed to produce ammonia gas, which is used as a reducing agent for reduction of NOx emitted from a diesel engine. Currently, most diesel engines utilize a UWS (urea-water solution) as a reducing agent. However, the need for significant heat energy for evaporation and thermal decomposition is one of the reasons driving low NOx reduction efficiency at low exhaust gas temperature conditions. On the other hand, the alternative method of supplying gaseous ammonia by thermal decomposition of solid AC has an advantage of relatively high NOx reduction efficiency at low exhaust gas temperature conditions. Recently, there have been studies on material properties of AC and system feasibility in order to use the AC as a diesel NOx reducing agent. In this study, a simple system for generating diesel NOx reducing agent upon thermal decomposition of AC was mathematically modeled. In addition, the thermal decomposition rate of the AC was expressed via an Arrhenius equation through TGA (thermo-gravimetric analysis) experiments, and the activation energy and pre-exponential factor of the Arrhenius equation were determined. Using the mathematical model and the Arrhenius equation of the thermal decomposition of AC, the effect of various parameters required for designing a reactor and system operation were investigated for a heavy-duty diesel engine with a displacement of 3.9L. Highlights A simple modeling of a reactor generating NOx reducing agent using ammonium carbamate. Sufficient amount of NH3 can be supplied to reduce NOx emitted from a diesel engine. Temperature affects on decomposition rate, reactor pressure and final remain AC mass. Reactor volume affects on pressure fluctuation, heating energy and refilling interval.

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참고문헌 (21)

10.4271/2017-01-0907 Johnson T, Joshi A. Review of Vehicle Engine Efficiency and Emission, SAE, 2018-01-0329, doi: 10.4271/2018-01-0329.
Appl Therm Eng Guan 66 395 2014 10.1016/j.applthermaleng.2014.02.021 Review of state of the art technologies of selective catalytic reduction of NOx from diesel engine exhaust

상세보기
10.4271/2009-01-0905 Chi JN, Control Challenges for Optimal NOx Conversion Efficiency from SCR Aftertreatment Systems, 2009-01-0905, doi: 10.4271/2009-01-0905.
J Energy Inst Praveena 91 704 2018 10.1016/j.joei.2017.05.010 A review on various after treatment techniques to reduce NOx emissions in a CI engine

상세보기
Fuel Zhang 237 465 2019 10.1016/j.fuel.2018.10.025 Optimisation design of SCR mixer for improving deposit performance at low temperatures

상세보기
10.4271/2013-01-1074 Zheng G, Sampath MK, Alcini W, Salanta G, Kotrba A, Axe B. Design Improvements of Urea SCR Mixing for Medium-Duty Trucks, SAE, 2013-01-1074, doi: 10.4271/2013-01-1074.
Appl. Thermal Eng. Prabhu 111 1211 2017 10.1016/j.applthermaleng.2016.09.134 An experimental and numerical study on effects of exhaust gas temperature and flow rate on deposit formation in Urea-Selective Catalytic Reduction (SCR) system of modern automobiles

상세보기
Int J Automot Technol Han 18 6 951 2017 10.1007/s12239-017-0093-6 Effect of UWS injection at low exhaust gas temperature on NOx removal efficiency of diesel engine

상세보기
10.4271/2014-01-1563 Smith H, Lauer T, Mayer M, Pierson S. Optical and Numerical Investigations on the Mechanisms of Deposit Formation in SCR Systems, SAE, 2014-01-1563, doi: 10.4271/2014-01-1563.

상세보기
Appl Catal B Bernhard 115-116 129 2012 10.1016/j.apcatb.2011.12.013 Hydrolysis and thermolysis of urea and its decomposition byproducts biuret, cyanuric acid and melamine over anatase TiO2

상세보기
Appl Therm Eng Choi 89 860 2015 10.1016/j.applthermaleng.2015.05.055 Numerical analysis of the optimum heating pipe to melt frozen urea-water-solution of a diesel urea-SCR system

상세보기
Appl. Thermal Eng. Choi 50 1235 2013 10.1016/j.applthermaleng.2012.08.008 Experimental investigation on melting characteristics of frozen urea-water-solutions for a diesel SCR de-NOx-system

상세보기
10.4271/2009-01-0907 Fulks G, Fisher GB, Rahmoeller K, Wu M, Herde ED, Tan J. A review of solid materials as alternative ammonia sources for lean NOx reduction with SCR, SAE, 2009-01-0907.
10.4271/2014-01-1535 Kim H, Yoon C, Lee J, Lee H. A study on the solid ammonium SCR system for control of diesel NOx emissions, SAE, 2014-01-1535, doi: 10.4271/2014-01-1535.
10.4271/2011-01-2207 Lacin F, Kotrba A, Haywirth G, Sullivan H, Tatur M, Jacques J, Tomazic D, Hoon H. SOLID SCR®: Demonstrating an Improved Approach to NOx Reduction via a Solid Reductant, SAE, 2011-01-2207, 2011. doi: 10.4271/2011-01-2207.
KSAE Lee 21 6 183 2013 10.7467/KSAE.2013.21.6.183 A study of reaction rate of solid SCR for NOx reduction of exhaust emissions in diesel engine

원문보기 상세보기
Brouwer M. Thermodynamics of the Urea Process, ACADEMIA, https://www.academia.edu/8373516/Thermodynamics_of_the_Urea_Process.
J. Phys. Chem. A Ramachandran 102 3934 1998 10.1021/jp980376n Kinetics and mechanism of the reversible dissociation of ammonium carbamate: involvement of carbamic acid

상세보기
Acta Crystallogr. Section B: Struct. Crystallogr. Crystal Chem. Adams 29 11 2317 1973 10.1107/S056774087300662X The crystal structure of ammonium carbamate
Ammonium carbamate crystals BASF Chemicals. 2010.
Fuel Neeft 76 12 1129 1997 10.1016/S0016-2361(97)00119-1 Kinetics of the oxidation of diesel soot

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DOI : 10.1016/j.fuel.2020.117306
Elsevier : 저널 > 논문

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