A study of hydrogen addition on diesel oxidation catalyst activities under the real diesel engine

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Published: Oct 8, 2018
Keywords:
Diesel oxidation catalyst NO/NO2 ratios Hydrogen

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K. Theinnoi
Combustion Technology and Alternative Energy Research Centre (CTAE), College of Industrial Technology, King Mongkut’s University of Technology North Bangkok, Bangkok, 10800, THAILAND
A. Tsolakis
School of Mechanical Engineering, University of Birmingham, Birmingham B15 2TT, UK
B. Sawatmongkhon
Combustion Technology and Alternative Energy Research Centre (CTAE), College of Industrial Technology, King Mongkut’s University of Technology North Bangkok, Bangkok, 10800, THAILAND
S. Chuepeng
Department of Mechanical Engineering, Faculty of Engineering at Si Racha, Kasetsart University, Chonburi, 20230, THAILAND

Abstract

The impact of small hydrogen concentration (approximately 1000 ppm H2) on the performance of a commercial Diesel Oxidation Catalyst (DOC) in reducing carbonaceous components and oxidising NO into NO2 under actual diesel engine exhaust gas conditions has been investigated. The experimental work was carried out at steady-state engine conditions for the short time periods; hence the catalyst tolerance to sulphur was not investigated. Hydrogen addition enhances hydrocarbon (HC) and carbon monoxide (CO) oxidation at lower temperatures and promotes nitrogen oxide (NO) to nitrogen dioxide (NO2) oxidation in the diesel exhaust gas. Trends that are expected to enhance Diesel Particulate Filter (DPF) regeneration at low temperatures and improve the activity of other aftertreatment systems such as Lean NOx catalysts. The hydrogen benefit was found to be dependent on the engine operation (i.e. use of exhaust gas recirculation-EGR), space velocity, exhaust gas condition and composition.

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How to Cite
Theinnoi, K., Tsolakis, A., Sawatmongkhon, B., & Chuepeng, S. (2018). A study of hydrogen addition on diesel oxidation catalyst activities under the real diesel engine. Journal of Research and Applications in Mechanical Engineering, 1(3), 29–32. Retrieved from https://ph01.tci-thaijo.org/index.php/jrame/article/view/149693
Issue
Vol. 1 No. 3 (2013)
Section
RESEARCH ARTICLES

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