Urban ozone air quality impact of emissions from vehicles using reformulated gasolines and M85 Export

@article{16342, abstract = {The urban ozone air quality impact of exhaust emissions from vehicles using reformulated gasolines and flexible/variable-fuel vehicles using M85 has been studied using emissions data from the Auto/Oil Air Quality Improvement Research Program and a single-cell trajectory air quality model with two different chemical mechanisms (the updated version of Carbon-Bond-IV (CB4) and the LCC mechanism). Peak ozone concentrations are predicted for each fuel for all combinations of the following ambient conditions: low and high atmospheric dilution or mixing height, four NMOG/NO(x) ratios, two each of the initial NMOG concentration, the vehicular contribution to the ambient air, and the NMOG composition of the initial ambient mixture. The ozone impact of a fuel depends strongly on the atmospheric dilution and NMOG/NO(x) ratio of an area. The differences in ozone impact among fuels are limited under the condition of high atmospheric dilution and a high NMOG/NO(x) ratio. The ozone-forming potentials (OFPs) for the exhaust emissions based on the maximum incremental reactivities (MIRs) for various fuels are generally well correlated with model-calculated peak ozone levels at a low NMOG/NO(x) ratio. These OFPs can serve to separate out fuels with rather different reactivities, but not fuels with comparable reactivities. Model-calculated ozone levels for various fuels based on CB4 and LCC mechanisms are relatively well correlated at low NMOG/NO(x) ratios, but much less so at higher ratios. Fuels with a high aromatic content, including high-toluene fuels, tend to be ranked more favorably by CB4 than by LCC. On the other hand, M85 is ranked more favorably by LCC than by CB4. Fuels with a low 90\% boiling point and a low content of aromatics and olefins are generally less reactive. M85 would be an attractive fuel if the formaldehyde emissions could be curtailed significantly. The urban ozone air quality impact of exhaust emissions from vehicles using reformulated gasolines and flexible-fuel vehicles using M85 was studied using an existing emissions data and a single-cell trajectory air quality model. Peak ozone concentrations were predicted for each fuel for all combinations of these ambient conditions: low and high atmospheric dilution or mixing height, four NMOG/NOx ratios, two each of the initial NMOG concentration, the vehicular contribution to the ambient air, and the NMOG composition of the initial ambient mixture. It was shown that the ozone impact of a fuel depends strongly on the atmospheric dilution and NMOG/NOx ratio of an area. The difference in ozone impact among fuels are limited under the condition of high atmospheric dilution and a high NMOG/NOx ratio.}, author = {Chock, D. P. and Winkler, S. L. and Chang, T. Y. and Rudy, S. J. and Shen, Z. K.}, citeulike-article-id = {2710894}, citeulike-linkout-0 = {http://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-0028501570&partnerID=40&rel=R7.0.0}, comment = {Cited By (since 1996): 8 ---=note-separator=--- Export Date: 23 April 2008 ---=note-separator=--- Source: Scopus}, journal = {Atmospheric Environment}, keywords = {air, alternative, box, chemical, fuels, gasolines, local-lib, mechanisms, model, quality, reformulated, trajectory}, number = {17}, pages = {2777--2787}, posted-at = {2008-04-23 23:34:54}, priority = {0}, title = {Urban ozone air quality impact of emissions from vehicles using reformulated gasolines and M85}, url = {http://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-0028501570&partnerID=40&rel=R7.0.0}, volume = {28}, year = {1994} }

TY - JOUR ID - 16342 L3 - citeulike-article-id:2710894 N2 - The urban ozone air quality impact of exhaust emissions from vehicles using reformulated gasolines and flexible/variable-fuel vehicles using M85 has been studied using emissions data from the Auto/Oil Air Quality Improvement Research Program and a single-cell trajectory air quality model with two different chemical mechanisms (the updated version of Carbon-Bond-IV (CB4) and the LCC mechanism). Peak ozone concentrations are predicted for each fuel for all combinations of the following ambient conditions: low and high atmospheric dilution or mixing height, four NMOG/NO(x) ratios, two each of the initial NMOG concentration, the vehicular contribution to the ambient air, and the NMOG composition of the initial ambient mixture. The ozone impact of a fuel depends strongly on the atmospheric dilution and NMOG/NO(x) ratio of an area. The differences in ozone impact among fuels are limited under the condition of high atmospheric dilution and a high NMOG/NO(x) ratio. The ozone-forming potentials (OFPs) for the exhaust emissions based on the maximum incremental reactivities (MIRs) for various fuels are generally well correlated with model-calculated peak ozone levels at a low NMOG/NO(x) ratio. These OFPs can serve to separate out fuels with rather different reactivities, but not fuels with comparable reactivities. Model-calculated ozone levels for various fuels based on CB4 and LCC mechanisms are relatively well correlated at low NMOG/NO(x) ratios, but much less so at higher ratios. Fuels with a high aromatic content, including high-toluene fuels, tend to be ranked more favorably by CB4 than by LCC. On the other hand, M85 is ranked more favorably by LCC than by CB4. Fuels with a low 90% boiling point and a low content of aromatics and olefins are generally less reactive. M85 would be an attractive fuel if the formaldehyde emissions could be curtailed significantly. The urban ozone air quality impact of exhaust emissions from vehicles using reformulated gasolines and flexible-fuel vehicles using M85 was studied using an existing emissions data and a single-cell trajectory air quality model. Peak ozone concentrations were predicted for each fuel for all combinations of these ambient conditions: low and high atmospheric dilution or mixing height, four NMOG/NOx ratios, two each of the initial NMOG concentration, the vehicular contribution to the ambient air, and the NMOG composition of the initial ambient mixture. It was shown that the ozone impact of a fuel depends strongly on the atmospheric dilution and NMOG/NOx ratio of an area. The difference in ozone impact among fuels are limited under the condition of high atmospheric dilution and a high NMOG/NOx ratio. IS - 17 JF - Atmospheric Environment EP - 2787 TI - Urban ozone air quality impact of emissions from vehicles using reformulated gasolines and M85 VL - 28 SP - 2777 KW - air KW - alternative KW - box KW - chemical KW - fuels KW - gasolines KW - local-lib KW - mechanisms KW - model KW - quality KW - reformulated KW - trajectory N1 - Cited By (since 1996): 8 N1 - Export Date: 23 April 2008 N1 - Source: Scopus AU - Chock, DP AU - Winkler, SL AU - Chang, TY AU - Rudy, SJ AU - Shen, ZK PY - 1994/// UR - http://www.scopus.com/scopus/inward/record.url?eid=2-s2.0-0028501570&partnerID=40&rel=R7.0.0 ER -