Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/15483
Title: Experimental investigation of regulated and unregulated emissions from a diesel engine fueled with Euro V diesel fuel and fumigation methanol
Authors: Zhang, ZH
Cheung, CS 
Chan, TL 
Yao, CD
Keywords: Diesel engine
Methanol
Particulate emissions
Regulated emissions
Unregulated emissions
Issue Date: 2010
Publisher: Pergamon-Elsevier Science Ltd
Source: Atmospheric environment, 2010, v. 44, no. 8, p. 1054-1061 How to cite?
Journal: Atmospheric Environment 
Abstract: Experiments were conducted on a four-cylinder direct-injection diesel engine with part of the engine load taken up by fumigation methanol injected into the air intake of each cylinder to investigate the regulated and unregulated gaseous emissions and particulate emission of the engine under five engine loads at an engine speed of 1920 rev min-1. The fumigation methanol was injected to top up 10%, 20% and 30% of the engine load under different engine operating conditions. The experimental results show that at low engine loads, the brake thermal efficiency (BTE) decreases with increase in fumigation methanol; but at high engine loads, the BTE is not significantly affected by fumigation methanol. The fumigation methanol results in significant increase in hydrocarbon (HC), carbon monoxide (CO) and nitrogen dioxide (NO2) emissions, but decrease in nitrogen oxides (NOx). For the unregulated gaseous emissions, unburned methanol, formaldehyde and BTX (benzene, toluene and xylene) emissions increase but ethyne, ethene and 1,3-butadiene emissions decrease. Particulate mass and number concentrations also decrease with increase in fumigation methanol. A diesel oxidation catalyst (DOC) is found to reduce significantly most of the pollutants, including the air toxics, when the exhaust gas temperature is sufficiently high.
URI: http://hdl.handle.net/10397/15483
DOI: 10.1016/j.atmosenv.2009.12.017
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