화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.15, No.5, 707-715, September, 2009
DOI10.1016/j.jiec.2009.09.050  Export Citation
Effects of hydrothermal aging on SiC-DPF with metal oxide ash and alkali metals
Byungchul Choi1, 2, †, Bao Liu2, and Jong-Woo Jeong1
  • 1School of Mechanical Systems Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea
  • 2Graduate School of Mechanical Engineering, Chonnam National University, Gwangju 500-757, Republic of Korea
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The silicon carbide used to make diesel particulate filters (SiC-DPF) has a maximum temperature of use, which is not the melting point of the filter material itself but rather the eutectic melting points of the ash materials and alkali metals deposited on the filter wall. Chemical reactions between the SiC filter and the other materials, i.e. ash materials and/or alkali metals, decrease the filtration efficiency and catalytic reactivity of engine out emission. The objective of this study is to understand the effect of hydrothermal aging on the SiC-DPF, and on the SiC-CDPF (catalyzed diesel particulate filter) deposited with ash materials and/or alkalimetals. Hydrothermal aging simulated for the extreme condition of uncontrolled regeneration in DPF is carried out by using H2O at high temperature. The surface change of the SiC filter was characterized in terms of the geometric microstructure and metal composites of the filter by using the SEM-EDS, BET and XRD. The accumulated ash materials and alkali metals in the SiC-DPF were an admixture, and the SiC-DPF after-treatment system always contained H2O. According to the results, H2O in the after-treatment system can be regarded as an influential factor of SiC-DPF durability even though the SiC itself has a very high melting point. The regeneration temperature has to be controlled under a critical value to ensure the durability of SiC-DPF in the after-treatment system, considering the fact that large quantities of ash materials, alkali metals and H2O components are included in the exhaust gas.
Keywords:Diesel engine;Silicon carbide (SiC);Diesel particulate filter (DPF);Hydrothermal aging
  1. Tomokazu O, SAE paper No. 2005-01-0579 (2005)
  2. Jeong JW, Choi BC, Lim MT, J. Ind. Eng. Chem., 14(6), 830 (2008)
  3. Merkel GA, Cutler WA, Warren CJ, SAE paper No. 2001-01-0190 (2001)
  4. Harada M, Ichikawa S, Otsuka A, Hattori M, Hashimoto S, SAE paper No. 2005-01-0582 (2005)
  5. Matti Maricq M, Aerosol. Sci., 38, 1079 (2007)
  6. Atribak I, Bueno-Lopez A, Garcia-Garcia A, Catal. Commun., 9, 250 (2008)
  7. Johnson TV, SAE paper No. 2006-01-0030 (2006)
  8. Tan JC, Opris CN, Baumgard KJ, Johnson JH, SAE paper No. 960136 (1996)
  9. Okazoe H, Shimizu K, Watanabe Y, Santiago E, Kugland P, Ruth W, SAE paper 960130 (1996)
  10. Choi BC, Kang HY, Son GS, Hwang CW, SAE paper No. 2007-01-1939 (2007)
  11. Uchida Y, Ichikawa S, Harada T, Hamanaka T, SAE paper No. 2003-01-0384 (2003)
  12. Ichikawa S, Uchida Y, Kaneda A, Hamanaka T, SAE paper No. 2004-01-0951 (2004)
  13. Yuuki K, Ito T, Sakamoto H, Matsubara R, Hashimoto S, Hamanaka T, SAE paper No. 2003-01-0383 (2003)
  14. Scherik CR, McDonald J, Olson B, SAE paper No. 2001-01-1351 (2001)
  15. Murtagh MJ, Sherwood DL, Socha LS, SAE paper No. 940235 (1994)
  16. Gubernat A, J. Eur. Ceram. Soc., 27, 781 (2007)
  17. Mizutani T, Watanabe Y, Yuuki K, Hashimoto S, Hamanaka T, SAE paper No. 2004-01-0159 (2004)
  18. Yaroshchyk PL, Morrison RJS, Body D, Chadwick BL, Spectrochim. Acta B, 60, 986 (2005)