TY - JOUR
T1 - Effect of branched C8 olefins addition to mexican gasoline on motor vehicles exhaust emissions
AU - López-Salinas, E.
AU - Mantilla, M. A.
AU - Ferrat, G.
AU - López, A.
AU - García, L. A.
AU - Vera, M.
PY - 2004
Y1 - 2004
N2 - Two groups of gasoline blends were prepared using a base-gasoline, containing 7.6% MTBE and added with either lower olefins (C5-C6) or butene's dimer (made up of 70% branched C8-olefins). In each gasoline group, the olefin concentration was varied 5, 10, and 15 vol%. The dimer was produced in our pilot plant facilities from a mixture of n-butenes. An FTP-75 test procedure, performed on a 98 model year vehicle, was used to assess the effect of olefins type (C5-C6 or C8) and their concentration in a gasoline blend on exhaust emissions; namely: CO, total hydrocarbons. NOx, and toxic compounds, such as aldehydes and ketones. Average CO emissions dropped 20-27%, when using 5-15 vol% C8 olefins-gasoline, in comparison with those using C5-C6 olefins-gasolines. Total hydrocarbons emissions, on the other hand, remained practically unaffected either by the type of olefins or their concentrations (5- 15 vol%). NOx emission factors decreased 10-14% when using the C8 olefins-gasolines, relative to those containing lower olefins. Main toxic pollutants were formaldehyde, propanone, and acetaldehyde. In average, acetaldehyde emissions decreased 23-53% in the dimer-gasoline group, but formaldehyde emissions increased 5-39%, depending on the olefins content and in comparison with the lower olefins-gasolines.
AB - Two groups of gasoline blends were prepared using a base-gasoline, containing 7.6% MTBE and added with either lower olefins (C5-C6) or butene's dimer (made up of 70% branched C8-olefins). In each gasoline group, the olefin concentration was varied 5, 10, and 15 vol%. The dimer was produced in our pilot plant facilities from a mixture of n-butenes. An FTP-75 test procedure, performed on a 98 model year vehicle, was used to assess the effect of olefins type (C5-C6 or C8) and their concentration in a gasoline blend on exhaust emissions; namely: CO, total hydrocarbons. NOx, and toxic compounds, such as aldehydes and ketones. Average CO emissions dropped 20-27%, when using 5-15 vol% C8 olefins-gasoline, in comparison with those using C5-C6 olefins-gasolines. Total hydrocarbons emissions, on the other hand, remained practically unaffected either by the type of olefins or their concentrations (5- 15 vol%). NOx emission factors decreased 10-14% when using the C8 olefins-gasolines, relative to those containing lower olefins. Main toxic pollutants were formaldehyde, propanone, and acetaldehyde. In average, acetaldehyde emissions decreased 23-53% in the dimer-gasoline group, but formaldehyde emissions increased 5-39%, depending on the olefins content and in comparison with the lower olefins-gasolines.
UR - http://www.scopus.com/inward/record.url?scp=1542377300&partnerID=8YFLogxK
U2 - 10.1081/LFT-120028531
DO - 10.1081/LFT-120028531
M3 - Artículo
SN - 1091-6466
VL - 22
SP - 177
EP - 187
JO - Petroleum Science and Technology
JF - Petroleum Science and Technology
IS - 1-2
ER -