Experimental investigation on regulated and unregulated emissions of a diesel/methanol compound combustion engine with and without diesel oxidation catalyst

Combustion, performance and emissions of a diesel power generator with direct injection of B7 and port injection of ethanol

“…Another extensive used aftertreatment system is diesel oxidation catalyst (DOC), used to oxidize THC and CO emissions to H2O and CO2, respectively, for diesel oil with low sulfur content [36]. This system is able to reduces CO and THC emissions to the standards limits [36][37][38][39][40][41][42]. Zhang et al [41] and Wei et al [42] also showed that alcohol fumigation in diesel engines increased CO, NO2 and THC emissions, but, after catalytic conversion, the concentrations of these components were significantly reduced, up to 38% for THC and 16% for CO [41], and for levels near diesel fuel operation with DOC system [42].…”

Comparative study on measurements of formaldehyde emission of methanol/gasoline fueled SI engine

“…As the clean and renewable alternative fuels, several kinds of alcohol fuels could reduce the regulate emissions when applied on the vehicles [1][2][3][4][5][6]. However, the use of alcohol in the vehicles could also lead to the increase of unregulated emissions such as formaldehyde and acetaldehyde [7][8][9][10][11][12].…”

An overview of methanol as an internal combustion engine fuel

“…The use of methanol in combination with diesel fuel is an effective measure to reduce PM and NO x emissions from in-use diesel vehicles. A diesel/ methanol compound combustion (DMCC) scheme was proposed and a four-cylinder naturally-aspirated direct-injection diesel engine was modified to operate on the proposed combustion scheme by Zhang et al [88]. The results showed that the DMCC scheme could effectively reduce NO x , particulate mass and number concentrations, ethyne, ethene and 1, 3-butadiene emissions but significantly increased the emissions of THC, CO, NO 2 , benzene, toluene, xylene (BTX), unburned methanol, formaldehyde, and the proportion of soluble organic fraction (SOF) in the particles.…”