AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Combining Selective Catalytic Reduction (SCR) System with Biodiesel in Mobile Sources: New Issues Arise
Yara S. Tadano, Guillherme C. Borillo, Thiago O. B. Silva, Fabio B. Valebona, Penteado Neto, Denis Rempel, Lucas Martin, Carlos I. Yamamoto, Sanja Potgieter-Vermaak, Ana Flavia L. Godoi, RICARDO H. M. GODOI, Federal University of Parana - Curitiba, PR, Brazil
Abstract Number: 346 Working Group: Combustion
Abstract Due to an urgent and pressing need to better understand the demand for petroleum-based energy, only a few studies have focused on the effects of biodiesel on the emission of unregulated pollutants from vehicles equipped with Selective Catalytic Reduction (urea-SCR) systems. The major goal of this research was to quantify the organic and inorganic gas emissions using a diesel engine equipped with urea-SCR measured by an FTIR system operating with Low-Sulfur Diesel (LSD), Ultra-Low-Sulfur Diesel (ULSD) or with a blend of 20% soybean biodiesel in ULSD (B20). A dynamometer test bench operating the European Steady Cycle (ESC) was used to access the pollutants concentrations. Our NO$_x emissions results are in compliance with the European, American and Brazilian regulations to SCR system use. However, biodiesel fuel in combination with SCR system yielded substantial concentrations of NH$_3, N$_2O, non-methane hydrocarbons (NMHC) and some diesel hydrocarbons (HCD). Formaldehyde (which has a high Photochemical Ozone Creation Potential [POCP]) emissions decrease when using SCR system, though N-octane (which has the higher Photochemical PeroxyAcetylNitrate Creation Potential [PPCP]) increased when combining SCR system with LSD and ULSD fuels. According to our results, we may conclude that the SCR system satisfies its original purpose of reducing NO$_x, however, it brings new issues comprising harmful compounds, such as NH$_3 and N$_2O. Combining biodiesel blend (B20) with the use of SCR system is a suitable strategy, as it reduces hazardous pollutants emissions and also reduces the emission of those compounds with high POCP and PPCP, formaldehyde and n-octane, respectively.