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Archive | 2013

A Study of SIC-Nanoparticles Porous Layer Formed on SIC-DPF Wall for Soot Oxidation

Keita Ishizaki; Shinichi Tanaka; Atsushi Kishimoto; Masamichi Tanaka; Naoki Ohya; Nobuhiro Hidaka

The pore structure of DPF is known to have a significant effect on filtration efficiency, pressure drop, and soot oxidation. It is reported that the formation of a nanoparticle porous layer on the surface of the DPF inlet wall promotes soot oxidation [1, 2, 3]. However, the correlation between pore size in the nanoparticle layer and soot oxidation performance, the effect of the layer in actual use environments, and the oxidation mechanism involved have not yet been clarified. The research discussed in this paper therefore formed SiC nanoparticle porous layers of various pore sizes on the inlet wall surfaces of SiC-DPF (creating what will be termed “NPL-DPF” here) using the dip-coating method [4]. The NPL thickness was set at 20 μm to help enable uniform coating samples to be obtained. With regard to filter pressure drop without soot loading, results for a bare DPF and a Pt/γ-Al2O3-coated DPF (catalyzed DPF; Pt = 1 g/L) were virtually identical. For the NPL-DPF, pressure drop increased as pore size was reduced. By contrast, in the case of pressure drop following soot loading (3 g/L), despite the fact that results for pressure drop for the NPL-DPF were higher than those for the bare DPF, they were lower than those for the catalyzed DPF. It is possible to stop deep-bed filtration by forming a nanoparticle porous layer on the surface of the DPF inlet wall [1, 5]. With regard to soot oxidation performance, the T80 of an NPL-DPF (NPL pore size = 350 nm) was found to be 40 % lower than that of a bare DPF and identical to that of a catalyzed DPF. In addition, reducing the NPL pore size enhanced soot oxidation performance. X-ray photoelectron spectra (XPS), transmission electron microscopy (TEM), and hydrogen temperature-programmed desorption (H2-TPD) results indicated that the SiC nanoparticle surface was covered by a 5 nm SiO2 oxide film. It was found that these oxidized SiC nanoparticles desorbed oxygen at around 450 °C. This desorbed oxygen promoted the oxidation of diesel soot. In addition, the filtration efficiency of the NPL-DPF without soot loading was 92 % against 78 % for the bare DPF.


Archive | 2003

Self-propelling crusher

Masamichi Tanaka; Yoshimi Shiba; Tadashi Shiohata; Kentaro Hashimoto


Archive | 1999

ENGINE CONTROL DEVICE FOR CRUSHING MACHINE

Ichio Endo; Kiyonobu Hirose; Masamichi Tanaka; 清信 広瀬; 正道 田中; 市夫 遠藤


Archive | 2009

Method for producing ceramic porous body and ceramic porous body

Manabu Fukushima; Masamichi Tanaka; Yu-ichi Yoshizawa; 友一 吉澤; 正道 田中; 福島 学


Archive | 2006

Herb extract-containing honey and method for producing the same

Yoshihiro Chikamatsu; Asuka Suhara; Masami Tanahashi; Masamichi Tanaka; 真美 棚橋; 正道 田中; 義博 近松; 亜澄香 須原


Archive | 2009

Coating material for forming porous film and porous film

Atsushi Kishimoto; Sunao Neya; Masamichi Tanaka; 淳 岸本; 直 根矢; 正道 田中


Tohoku Journal of Experimental Medicine | 1955

A Fixed Anode Tube with a Very Fine Focus Made with Autobiased Electron Beam

Shinji Takahashi; Kihachiro Komiyama; Masamichi Tanaka


Archive | 2012

Exhaust purification catalyst and exhaust gas purifier of internal combustion engine

Masamichi Tanaka; 正道 田中; Nobuhiro Hidaka; 宣浩 日▲高▼; Katsusato Hanamura; 克悟 花村


Archive | 2009

SiC-BASED SINTERED COMPACT RING FOR MECHANICAL SEAL DEVICE, METHOD FOR MANUFACTURING THE SAME, AND MECHANICAL SEAL DEVICE AND LIGHT-WATER REACTOR PLANT

Kenjiro Katayama; Mikiro Konishi; Masashi Takahashi; Masamichi Tanaka; Hiroyuki Ueda; Yuji Yasuda; 裕之 上田; 祐司 安田; 幹郎 小西; 健二郎 片山; 正道 田中; 雅士 高橋


Archive | 2008

Coating for forming porous film and porous film

Sunao Neya; Masamichi Tanaka; Shinichi Tanaka; 直 根矢; 伸一 田中; 正道 田中

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Manabu Fukushima

National Institute of Advanced Industrial Science and Technology

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Yu-ichi Yoshizawa

National Institute of Advanced Industrial Science and Technology

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