Influência do combustível (diesel e biodiesel) e das características da frota de veículos do transporte coletivo de Curitiba nas emissões de NOx

• Autor(a) principal: Ribas, Wellington Ferreira
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório do Centro Universitário Braz Cubas
• Texto Completo: https://repositorio.cruzeirodosul.edu.br/handle/123456789/2439
• topic: Diesel - Aspectos ambientais; Biodiesel- Aspectos ambientais; Transporte coletivo; Gestão ambiental; CNPQ::CIENCIAS BIOLOGICAS; CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA

The public transport in Curitiba is considered a model for Brazil. With an operating fleet of 1,930 vehicles, 29 of them currently use biofuels (B-100). The aim of the work is the comparative study of NOx emission by vehicles of public transport in Curitiba diesel and biodiesel vehicles considering similar powertrain and various ages with use of diesel S-10 (B-5) and B-100 biodiesel. The methodology applied in this work was developed in two phases. Initially the measurement of NO, NO2 and NOx in the exhaust of vehicles of public transport in Curitiba powered by biodiesel and diesel was taken. Later it was performed the analysis and comparison of the emission of NO, NO2 and NOx according to the conditions of the vehicle fleet. Models that feature Volvo engine (B7R, B10M, B12M and B215RH) and use diesel fuel (S10 / B5) or biodiesel (B100) were chosen. The gas collection was taken directly to the output of the exhaust pipe of the vehicle at rest. There was an increase of 37,14 % in the emission of NO with the use of biodiesel, with the main contributor to the increase in NOx emissions NOx emissions from the combustion of biodiesel were approximately 26% greater than the resulting emissions the use of diesel fuel. Exhaust emissions (NOx) measures for B12M engines with up to 3 years of use, on average, 40 % lower than in an equivalent engine with 10 years of use. The emission of NOx is too high for vehicles older than seven years of use. It is concluded that biodiesel powered vehicles emit larger amounts of NOx when compared to vehicle and powertrain similar life time.