Exhaust emissions of a diesel engine using ethanol-in-palm oil／diesel microemulsion-based biofuels
Exhaust emissions of a diesel engine using ethanol-in-palm oil／diesel microemulsion-based biofuels / Ampira Charoensaeng, Sutha Khaodhiar, David A. Sabatini, Noulkamol Arpornpong
p. 242-249 ; 26 cm
수록자료: Environmental engineering research. Korean Society of Environmental Engineers. Vol.23 no.3(2018 Sept.), p. 242-249 23:3<242 ISSN 1226-1025↔ 저자: Ampira Charoensaeng, The Petroleum and Petrochemical College, Chulalongkorn University 저자: Sutha Khaodhiar, Department of Environmental Engineering, Chulalongkorn University ; The Center of Excellence on Hazardous Substance Management, Chulalongkorn University 저자: David A. Sabatini, School of Civil Engineering and Environmental Science, The University of Oklahoma 저자: Noulkamol Arpornpong, Faculty of Agriculture, Natural Resources and Environment, Naresuan University
The use of palm oil and diesel blended with ethanol, known as a microemulsion biofuel, is gaining attention as an attractive renewable fuel for engines that may serve as a replacement for fossil-based fuels. The microemulsion biofuels can be formulated from the mixture of palm oil and diesel as the oil phase; ethanol as the polar phase; methyl oleate as the surfactant; alkanols as the cosurfactants. This study investigates the influence of the three cosurfactants on fuel consumption and exhaust gas emissions in a direct-injection (DI) diesel engine. The microemulsion biofuels along with neat diesel fuel, palm oil-diesel blends, and biodiesel-diesel blends were tested in a DI diesel engine at two engine loads without engine modification. The formulated microemulsion biofuels increased fuel consumption and gradually reduced the nitrogen oxides (NOₓ) emissions and exhaust gas temperature; however, there was no significant difference in their carbon monoxide (CO) emissions when compared to those of diesel. Varying the carbon chain length of the cosurfactant demonstrated that the octanol-microemulsion fuel emitted lower CO and NOₓ emissions than the butanol- and decanol-microemulsion fuels. Thus, the microemulsion biofuels demonstrated competitive advantages as potential fuels for diesel engines because they reduced exhaust emissions.