Issue 37, 2014

Low-temperature oxidation of particulate matter using ozone

Abstract

Low-temperature oxidation of particulate matter (PM) was investigated using ozone, which has high oxidation ability. Granular carbon was first used as a model PM to investigate the influential factors for PM oxidation with ozone. The PM collected from diesel exhaust using a diesel particulate filter was then evaluated to determine the oxidation performance of ozone. Carbon was effectively oxidized by ozone at low temperatures less than 573 K and the oxidation rate was larger than ten times that for NO2 at 423 K; however, the oxidation rates were decreased by the thermal decomposition of ozone and reaction with NO as an exhaust gas component. The oxidation rate when using ozone could be calculated with inclusion of these factors using the Arrhenius equation. The PM oxidation characteristics were similar to those for granular carbon. The results indicate that oxidation with ozone is a promising method for low-temperature PM oxidation and optimized performance with ozone could be achieved.

Graphical abstract: Low-temperature oxidation of particulate matter using ozone

Article information

Article type
Paper
Submitted
05 Feb 2014
Accepted
11 Apr 2014
First published
24 Apr 2014

RSC Adv., 2014,4, 19144-19149

Author version available

Low-temperature oxidation of particulate matter using ozone

Y. Itoh, Y. Sakakibara and H. Shinjoh, RSC Adv., 2014, 4, 19144 DOI: 10.1039/C4RA01003E

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