Improvement of Emissions and Therrmal Efficiency in Diesel Combustion with Oxygenated Agents as Main Fuel

DI Diesel Engine Performance and Emissions from the Oxygen Enrichment of Fuels with Various Aromatic Content

“…15 The decrease of exhaust smoke correlates quite well with increasing oxygen content and, according to some researchers, is not affected by changes in the additive type or blending ratio. 12 Recent studies have demonstrated that the previous observation is valid for oxygenated compounds with low molecular weight and one or two oxygen atoms in their molecule. 12,16 However, other studies have shown that the rate of decrease of soot emissions varies with engine type, operating conditions, and the type of additive used, especially in cases of fuels with complex molecular structure and multiple oxygen atoms.…”

“…12 Recent studies have demonstrated that the previous observation is valid for oxygenated compounds with low molecular weight and one or two oxygen atoms in their molecule. 12,16 However, other studies have shown that the rate of decrease of soot emissions varies with engine type, operating conditions, and the type of additive used, especially in cases of fuels with complex molecular structure and multiple oxygen atoms. [15][16][17][18] The addition of oxygen within fuel generally results in a decrease of particulates, smoke, CO, and HC emissions with small penalties in NO x emissions.…”

“…On the other hand, it has been demonstrated that the use of methanol, ethanol, ethers, methylals, and carbonates as oxygenated fuel additives reduces considerable particulate and soot emissions. [1][2][3][5][6][7][8][9][10][11][12][13][14] Studies in laminarpremixed flames have identified the profound influence of fuel-bounded oxygen on the reduction of the molar concentration of PAH species and soot. 15 The decrease of exhaust smoke correlates quite well with increasing oxygen content and, according to some researchers, is not affected by changes in the additive type or blending ratio.…”

“…In fact, smokeless operation has been reported in the literature with the use of pure dimethyl ether, diglyme, or tri-propylene glycol methyl ether. 12,[19][20][21] In the past, researchers doubted that it is possible to reduce soot and NO x emissions with only the use of oxygenated fuels and they have implied that it was necessary to use simultaneously oxygenated additives and high EGR ratios to obtain the desired results. [22][23][24] However, the use of EGR weakens and, for high ratios, diminishes the effect of fuel quality on diesel exhaust emissions.…”

Thermodynamic and kinetic study of the production of oxygenated compounds: Synthesis of 1,1‐diethoxybutane catalyzed by amberlyst‐15

“…However, one of the most promising applications of acetals is as a renewable diesel additive . Published works have shown that the use of oxygenated compounds such as acetals to increase the oxygen content in diesel fuels significantly reduces the emission levels of particulate matter and nitrogen oxides (NO x ) . The use of the acetal 1,1‐diethoxyethane (DEE) as a diesel fuel additive has shown a marked reduction of exhaust smoke .…”