On-road emissions of carbonyls from vehicles powered by biofuel blends in traffic tunnels in the Metropolitan Area of Sao Paulo, Brazil

Author(s)

Nogueira, Thiago ^[1] ; de Souza, Kely Ferreira ^[2] ; Fornaro, Adalgiza ^[1] ; Andrade, Maria de Fatima ^[1] ; Franco de Carvalho, Lilian Rothschild ^[2]

Affiliation

^[1] Univ Sao Paulo, Inst Astron Geophys & Atmospher Sci, Dept Atmospher Sci, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, BR-05508900 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Atmospheric Environment; v. 108, p. 88-97, MAY 2015.
• Web of Science Citations: 13

Abstract

On-road emissions of carbonyls from the current vehicle fleet of Brazil were determined in two experimental campaigns, conducted in traffic tunnels located in the Metropolitan Area of Sao Paulo (MASP), in southeastern Brazil. Among carbonyl species, formaldehyde and acetaldehyde were the most abundant in all sampling periods. In Brazil, heavy-duty vehicles (HDVs) run on a blend of 95% regular diesel/5% biodiesel from soy, whereas light-duty vehicles (LDVs) run on gasohol (75-80% gasoline/20-25% ethanol) or hydrous ethanol. We found that HDVs showed the highest overall carbonyl emissions, although LDVs were responsible for high emissions of acetaldehyde. In comparison with LDVs in California, which are powered by 90% gasoline/10% ethanol, LDVs in Brazil were found to emit 352% and 263% more formaldehyde and acetaldehyde. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 11/18777-6 - Assessment of vehicular emissions of organic and inorganic compounds from the combustion of biofuels and their contributions to air quality in the metropolitan area of São Paulo
• Grantee: Thiago Nogueira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral