A poluição gerada por máquinas de combustão interna movidas à diesel - a questão dos particulados. Estratégias atuais para a redução e controle das emissões e tendências futuras

• Main Authors: Braun Silvana, Appel Lucia Gorenstin, Schmal Martin
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2004-01-01
• Series: Química Nova
• Subjects: diesel particulates; soot; diesel exhaust after-treatment; catalysts
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000300018

The exhaust emissions of vehicles greatly contribute to environmental pollution. Diesel engines are extremely fuel-efficient. However, the exhaust compounds emitted by diesel engines are both a health hazard and a nuisance to the public. This paper gives an overview of the emission control of particulates from diesel exhaust compounds. The worldwide emission standards are summarized. Possible devices for reducing diesel pollutants are discussed. It is clear that after-treatment devices are necessary. Catalytic converters that collect particulates from diesel exhaust and promote the catalytic burn-off are examined. Finally, recent trends in diesel particulate emission control by novel catalysts are presented.