title: Increase in ozone due to the use of biodiesel fuel rather than diesel fuel.
abstract: The consumption of fuel by vehicles emits nitrogen oxides (NOx) and non-methane hydrocarbons (NMHCs) into the atmosphere, which are important ozone precursors. Ozone is formed as a secondary pollutant via photochemical processes and is not emitted directly into the atmosphere. In this paper, the ozone increase resulting from the use of biodiesel and diesel fuels was investigated, and the different ozone formation trends were experimentally evaluated. Known amounts of exhaust gas from a power generator operated using biodiesel and diesel fuels were added to ambient air. The quality of the ambient air, such as the initial NMHC and NOx concentrations, and the irradiation intensity have an effect on the ozone levels. When 30 cm(3) of biodiesel fuel exhaust gas (BFEG) or diesel fuel exhausted gas (DFEG) was added to 18 dm(3) of ambient air, the highest ratios of ozone increase from BFEG compared with DFEG in Japan and Vietnam were 31.2 and 42.8%, respectively, and the maximum ozone increases resulting from DFEG and BFEG compared with the ambient air in Japan were 17.4 and 26.4 ppb, respectively. The ozone increase resulting from the use of BFEG was large and significant compared to that from DFEG under all experimental conditions. The ozone concentration increased as the amount of added exhaust gas increased. The ozone increase from the Jatropha-BFEG was slightly higher than that from waste cooking oil-BFEG.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka, 599-8531, Japan; Institute of Environmental Technology (IET), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Street, Nghia Do, Cau Giay, Hanoi, Viet Nam. Electronic address: thang236@gmail.com.
authors.forename: Phan Quang
authors.initials: PQ
authors.lastname: Thang
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka, 599-8531, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Muto
authors.affiliation: Research Organization for University-Community Collaborations, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan.
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Maeda
authors.affiliation: Institute of Environmental Technology (IET), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Street, Nghia Do, Cau Giay, Hanoi, Viet Nam.
authors.forename: Nguyen Quang
authors.initials: NQ
authors.lastname: Trung
authors.affiliation: Osaka City Institute of Public Health & Environmental Sciences, 8-34 Tojo-cho, Tennoji-ku, Osaka, 543-0026, Japan.
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Itano
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai-shi, Osaka, 599-8531, Japan.
authors.forename: Norimichi
authors.initials: N
authors.lastname: Takenaka
mesh_terms: D000393:Air Pollutants; D056804:Biofuels; D005742:Gasoline / Q000032:analysis; D006838:Hydrocarbons; D007564:Japan; D009589:Nitrogen Oxides; D010126:Ozone; D001335:Vehicle Emissions; D014744:Vietnam
chemical_list: D000393:Air Pollutants; D056804:Biofuels; D005742:Gasoline; D006838:Hydrocarbons; D009589:Nitrogen Oxides; D001335:Vehicle Emissions; D010126:Ozone
keywords: Biodiesel fuel; Emission; NMHCs; NO(x); Ozone increment; Vietnam