doi: 10.3850/978-981-08-7614-2_IMPRES055


Study on the SO2 Adsorption Behavior of Composite Materials for DeSOx Filter from Diesel Exhaust


Yugo Osaka1, Shinya Kurahara2, Noriyuki Kobayashi3, Masanobu Hasatani4 and Akihiro Matsuyama

1Department of Mechanical Engineering, Kanazawa University, Kakuma mach, Kanazawa city, Ishikawa pref., 920-1192, Japan.

y-osaka@t.kanazawa-u.ac.jp

2Department of Mechanical Engineering, Aichi Institute of Technology, 1247 Yachigusa, Yagusa cho, Toyota city, Aich pref., 470-0392, Japan

3Department of Chemical Engineering Science, Nagoya University, Furo cho, Chikusa ku, Nagoya city, Aichi pref., 464-8603, Japan

4DENOSO corporation, Kariya city, Aichi pref., 44-8661, Japan

ABSTRACT

NOx emitted from diesel is one of the main air pollutants for most countries. To reduce the emission of NOx, NOx storage / reduction (NSR) catalyst has been developed for the diesels. The catalyst for NSR is strongly poisoned by sulfur. In this paper, we made Na added CaCO3 as a new material. We conducted measurements of the desulfurization breakthrough characteristic using monolith washcoated Na added CaCO3 at 450 degree C. In this result, Na added CaCO3 absorbed SO2 about 77.6 ˜ 90.6 mgSO2/gmaterial at 450 degree C (CaCO3 is 8 mgSO2/gmaterial). The reason why Na added CaCO3 is improved is investigated by using XRD and SEM-EDX analysis. From this analysis, it is clear that this new material becomes partially Na2Ca(CO3)2 as a composite material. We showed improvement of SO2 absorption ability by the formation of composite materials. SO2 in the exhausted gas is absorbed at more low temperature. As a future works, More high ability materials must be synthesized to explicate SO2 absorption mechanism of composite materials.

Keywords: DeSOX filter, Diesel exhaust, CaCO3, Composite material.


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