Effectiveness of non-noble metal based diesel oxidation catalysts on particle number emissions from diesel and biodiesel exhaust.

Autor: Shukla PC; Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur-208016, India., Gupta T; Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur-208016, India., Labhasetwar NK; National Environmental Engineering Research Institute, Council of Scientific & Industrial Research, Nagpur-440020, India., Khobaragade R; National Environmental Engineering Research Institute, Council of Scientific & Industrial Research, Nagpur-440020, India., Gupta NK; Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur-208016, India., Agarwal AK; Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur-208016, India. Electronic address: akag@iitk.ac.in.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2017 Jan 01; Vol. 574, pp. 1512-1520. Date of Electronic Publication: 2016 Aug 31.
DOI: 10.1016/j.scitotenv.2016.08.155
Abstrakt: Two new formulations of non-noble metal based diesel oxidation catalysts based on CoCe based mixed oxide (DOC 2 ) and perovskite catalysts (DOC 3 ) were prepared and retrofitted in a 4-cylinder diesel engine fueled by diesel and Karanja biodiesel blend (KB20). In this study, their effectiveness in reducing raw exhaust particulate emissions vis-à-vis a commercial diesel oxidation catalyst (DOC 1 ) was evaluated. Emission characteristics such as particle number-size distribution, mass-size distribution, and surface area-size distribution, total particle number concentration and count mean diameter as a function of engine load at constant engine speed were evaluated. Variations in total particle number concentration as a function of engine speed were also determined. The prepared DOCs and the commercial DOC showed varying degrees of performance as a function of engine operating conditions. Overall, effectiveness of the prepared DOC's appeared to be more fuel specific. For diesel exhaust, overall performance of DOC 1 was more effective compared to both prepared DOCs, with DOC 2 being superior to DOC 3 . In case of KB20 exhaust, the overall performance of DOC 2 was either more effective or nearly comparable to DOC 1, while DOC 3 being not so effective. This showed that the DOCs based on CoCe based mixed oxide catalysts have potential to replace commercial noble metal based DOC's, especially in engines fueled by biodiesel.
(Copyright © 2016 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: