Abstract:In order to analyze the impact of unregulated emissions of F-T diesel and its blended fuels with n-Butanol, the experiment was carried out on a turbocharged and intercooled four-cylinder diesel engine using 0# diesel, F-T diesel and the blended fuels of F-T diesel with n-butanol at external characteristics. The emissions were measured by FTIR multi-component gas tester which include formaldehyde, 1, 3-butadiene, carbon dioxide, nitrous oxide and methanol. The results showed that compared with diesel the F-T diesel and the blended fuels can reduce formaldehyde, 1,3-butadiene, CO2 and N2O four kinds of unregulated emissions, methanol emissions increased slightly not over 3.11ppm. With the n-butanol proportion increasing, formaldehyde, 1,3-butadiene, carbon dioxide and nitrous oxide have further decrease and methanol emission also declines. F-T diesel and the blended fuels can reduce unregulated emissions of diesel, and they are new kind of alternative fuels composed by coal-based and biomass.