吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (6): 1804-1810.doi: 10.13229/j.cnki.jdxbgxb201506011

Previous Articles     Next Articles

Decomposition characteristics of solid reductant of vehicle SCR system

MA Jun-yan, QU Da-wei, LI Jun   

  1. State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130022,China
  • Received:2013-11-14 Online:2015-11-01 Published:2015-11-01

RICH HTML

0   

PDF (PC)

574

Abstract: The ammonia content, decomposition temperature and decomposition rate of ammonium bicarbonate, ammonium carbonate and ammonium carbamate are investigated by theoretical analysis, Thermogravimetric Analysis (TGA) experiment and equilibrium pressure experiments. Results show that ammonium carbamate has the highest ammonia content, followed by ammonium carbonate, and ammonium bicarbonate has the lowest ammonia content. Ammonium carbonate and ammonium carbamate can decompose from room temperature, but when heated to 100 ℃ ammonium bicarbonate only decomposes 5.6%. When the temperature is below 90 ℃, the decomposition rate of ammonium carbamate is higher than that of ammonium carbonate. Under the same period and same temperature, ammonium carbamate produces more ammonia. The decomposition equilibrium pressures of ammonium carbonate and ammonium carbamate are similar; both are excellent candidates of reductant of Selective Catalytic Reduction (SCR) system, but ammonium carbamate has more obvious advantages.

Key words: power machinery and engineering, decomposition characteristics, ammonium salt, selective catalytic reduction

CLC Number: 

  • TK421.5
[1] 龚金科. 汽车排放及控制技术[M]. 北京: 人民交通出版社, 2012.
[2] 周庆辉. 现代汽车排放控制技术[M]. 北京: 北京大学出版社,2010.
[3] 陶建忠. 利用选择性催化还原反应(SCR)降低车用柴油机氮氧化物的研究[D]. 济南:山东大学能源与动力工程学院,2008.
Tao Jian-zhong. Study on DeNOx technology by selective catalytic reduction(SCR) for heavy-duty diesel engines[D]. Ji'nan: Shandong University,School of Energy and Power Engineering,2008.
[4] 楼狄明,张正兴,谭丕强,等. 后处理技术降低柴油机NO x 排放的研究进展[J]. 小型内燃机与摩托车,2010,39(2):70-74.
Lou Di-ming, Zhang Zheng-xing, Tan Pi-qiang, et al. Progress of reasearch on reducing NOx emission of diesel engine with after treatment technology[J]. Small Internal combustion Engine and Motorcycle,2010,39(2):70-74.
[5] Iitsuka Y, Yamauchi H, Sato S,et al. Ammonia production from solid urea using nonthermal plasma[J]. IEEE Transactions on Industry Applications,2012,48(3):872-877.
[6] 高继东,秦孔建,梁荣亮,等.实际道路工况和法规工况下中型柴油机排放特性的对比分析[J]. 吉林大学学报:工学版,2012,42(1):33-38.
Gao Ji-dong,Qin Kong-jian,Liang Rong-liang,et al. Comparative analysis of medinm-duty diesel engine emissions under BJCBC and ETC[J]. Journal of Jilin University(Engineering and Technology Edition), 2012,42(1):33-38.
[7] 楼狄明,张正兴,谭丕强, 等.车用柴油机选择性催化还原技术研究进展[J]. 环境科学与技术, 2009, 32(12):103-108.
Lou Di-ming, Zhang Zheng-xing, Tan Pi-qiang, et al. Progress of research on selective catalytic reduction technology for vehicle diesel engine[J]. Environmental Science&Technology,2009,32(12):103-108.
[8] Johnson T V. Review of diesel emissions and control[C]∥SAE paper,2010-01-0301.
[9] Lacin F, Kotrba A, Hayworth G, et al. SOLID SCR: demonstrating an improved approach to NO x reduction via a solid reductant[C]∥SAE paper,2011-01-2207.
[10] Johannessen T, Schmidt H, Frey A M, et al. Improved automotive NO x aftertreatment system: metal ammine complexes as NH 3 source for SCR using fe-containing zeolite catalysts[J]. Catalysis Letters,2009,128(1-2):94-100.
[11] 张克立,张友祥,马晓玲. 固体无机化学[M]. 武汉:武汉大学出版社,2012.
[12] 刘东旭.碳酸氢铵作为脱硝还原剂的实验研究与数值模拟[D]. 北京:华北电力大学能源动力与机械工程学院,2009.
Liu Dong-xu. The experimental research and numerical simulation of ammonium bicarbonate for denitiation reductant[D]. Beijing: North China Electric Power University, School of Energy,Power and Mechanical Engineering,2009.
[13] 金丽萍,邬时清,陈大勇. 物理化学实验[M]. 上海:华东理工大学出版社,2005.
[1] JIANG Tao,LIN Xue-dong,LI De-gang,YANG Miao,TANG Xue-lin. Effect of control parameters on heat release rate with ANN method [J]. Journal of Jilin University(Engineering and Technology Edition), 2018, 48(6): 1747-1754.
[2] LIN Xue-dong, JIANG Tao, XU Tao, LI De-gang, GUO Liang. Control strategy of high pressure pump in starting condition of high pressure common rail diesel engine [J]. Journal of Jilin University(Engineering and Technology Edition), 2018, 48(5): 1436-1443.
[3] LI Zhi-jun, WANG Hao, HE Li, CAO Li-juan, ZHANG Yu-chi, ZHAO Xin-shun. Soot distribution features and its influence factors in catalytic diesel particulate filte [J]. Journal of Jilin University(Engineering and Technology Edition), 2018, 48(5): 1466-1474.
[4] QIN Jing, XU He, PEI Yi-qiang, ZUO Zi-nong, LU Li-li. Influence of initial temperature and initial pressure on premixed laminar burning characteristics of methane-dissociated methanol flames [J]. Journal of Jilin University(Engineering and Technology Edition), 2018, 48(5): 1475-1482.
[5] ZHONG Bing, HONG Wei, JIN Zhao-hui, SU Yan, XIE Fang-xi, ZHANG Fu-wei. Movement characteristics of hydraulic variable valve train with early intake valve closing [J]. 吉林大学学报(工学版), 2018, 48(3): 727-734.
[6] LI Long, ZHANG You-tong, ZUO Zheng-xing. Application of variable-load control in cylinder pressure control of free-piston engine generator [J]. 吉林大学学报(工学版), 2018, 48(2): 473-479.
[7] TIAN Jing, LIU Zhong-chang, LIU Jin-shan, DONG Chun-xiao, ZHONG Ming, DU Wen-chang. Performance optimization of diesel engine based on response surface methodology of multi-boundary combustion conditions [J]. 吉林大学学报(工学版), 2018, 48(1): 159-165.
[8] WEI Hai-qiao, PEI Zi-gang, FENG Deng-quan, PAN Jia-ying, PAN Ming-zhang. Effect of multi-injectionpiezo injector on particulate emission in gasoline direct injection engine [J]. 吉林大学学报(工学版), 2018, 48(1): 166-173.
[9] LI Zhi-jun, HE Li, JIANG Rui, SHEN Bo-xi, KONG Xiang-jin, LIU Shi-yu. Evaluation of influence of ash distribution on diesel particulate filter pressure drop [J]. 吉林大学学报(工学版), 2017, 47(6): 1760-1766.
[10] YU Liu, LIU Zhong-chang, LIU Jiang-wei, DU Hong-fei, XU Yun. Gasoline direct injection engine spray droplet characteristics [J]. 吉林大学学报(工学版), 2017, 47(5): 1482-1488.
[11] LIU Zhong-chang, TENG Peng-kun, TIAN Jing, XU Yun, QI Sheng-lin, YU Kai-bo. Regulation characteristics of bypass valve of two stage turbocharged diesel engine [J]. 吉林大学学报(工学版), 2017, 47(3): 796-803.
[12] SUN Wen-xu, HONG Wei, XIE Fang-xi, SU Yan, JIANG Bei-ping, LI Xiang-yu. Effects of idle speed and throttle opening on engine shutdown characteristics and realization of direct start mode [J]. 吉林大学学报(工学版), 2017, 47(2): 483-489.
[13] LI Zhi-jun, WANG Nan, ZHANG Li-qiang, HUANG Qun-jin, WEI Suo-ku, ZHANG Yan-ke. Numerical simulation for flow and pressure drop characteristics in asymmetrical channels of diesel particulate filter [J]. 吉林大学学报(工学版), 2016, 46(6): 1892-1899.
[14] SUN Wen-xu, HONG Wei, HUANG En-li, XIE Fang-xi, SU Yan, JIANG Bei-ping. Effect of initial piston position on direct-start mode of gasoline engine without starter [J]. 吉林大学学报(工学版), 2016, 46(5): 1471-1477.
[15] LI Xiao-ping, HONG Wei, XIE Fang-xi, LI Xiang-yu, YANG Wen-hai, DAI Zhi-yao. NOx emission reduction of a lean-burn methanol engine by retarding ignition timing, exhaust gas recirculation and leaner air/fuel mixture [J]. 吉林大学学报(工学版), 2016, 46(5): 1478-1483.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Jilin University(Engineering and Technology Edition), All Rights Reserved.
Tel: +86-431-85095297　Fax: +86-431-85094074　E-mail: xbgxb@jlu.edu.cn
Powered by Beijing Magtech Co. Ltd