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Title: Effect of dimethyl carbonate blended diesel on emissions of a 4-cylinder diesel engine
Authors: Cheung, CS 
Lee, SC 
Kwok, A
Tung, CW
Issue Date: 2005
Source: HKIE transactions, 2005, v. 12, no. 3, p. 15-20
Abstract: Dimethyl carbonate (DMC) is an attractive fuel additive due to its excellent physical-chemical and lower toxicity properties. In the present study, pure ultra-low sulphur diesel fuel (ULSD) and DMC blended diesel fuel were tested for their emission characterisations on a 4-cylinder diesel engine. The experiments were conducted using ULSD with different proportions of DMC. The %DMC affects the fuel properties, the injection properties and hence the combustion process and the emissions. Experimental results show that power output was reduced with an increase of %DMC on a fixed fuel pump setting or there was an increase in fuel consumption. Reduction in power is due to the lower calorific value of the blended fuel. The results also indicate a significant decrease in smoke and particulate concentrations, as well as the total carbon content of the particulate, with addition of DMC. There was also a slight decrease in nitrogen oxides (NO x). However, an increase in both hydrocarbon (HC) and carbon monoxide (CO) was observed. As far as VOC is concerned, there was an obvious increase in benzene and toluene, in the exhaust. Trace amount of DMC was also detected in the exhaust.
Keywords: Diesel engine
Dimethyl carbonate (DMC)
Publisher: Hong Kong Institution of Engineers
Journal: HKIE transactions 
ISSN: 1023-697X
EISSN: 2326-3733
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