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

Autor(es)

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

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Atmospheric Environment; v. 108, p. 88-97, MAY 2015.
• Citações Web of Science: 13

Resumo

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)

• Processo FAPESP: 11/18777-6 - Avaliação das emissões veiculares de compostos orgânicos e inorgânicos provenientes da combustão de biocombustíveis e suas contribuições na qualidade do ar na RMSP
• Beneficiário: Thiago Nogueira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado