Engine Performance Characteristics for Biodiesels of Different Degrees of Saturation and Carbon Chain Lengths

Impact of biodiesel and renewable diesel on emissions of regulated pollutants and greenhouse gases on a 2000 heavy duty diesel truck

“…This increasing effect of biodiesels on NO x emissions is consistent with previous studies (Karavalakis et al, 2009;Cheung et al, 2009;Hajbabaei et al, 2012). The degree of unsaturation and Cetane number of biodiesel are reported to be associated with NO x emissions (Knothe, 2005;Pham et al, 2013). That is, the higher the proportion of unsaturation and the lower the Cetane number, the higher NO x emissions.…”

Experimental Investigations of Innovative Biomass Energy Harnessing Solutions

“…In a similar experiment, Kumar et al also found that for a constant injection timing of 20 CAD (crank angle degree), the use of neat animal fat led to a decrease of maximum cycle pressure from 95 bar to 82 bar [5]. A biodiesel mixture of animal fat was used to fuel a diesel engine at full engine load, with the same injection timing and injection pressure in by the authors of [6]. Because of the lower heating value of biodiesel compared to diesel fuel, the use of biodiesel led to a reduction in maximum pressure and indicated mean effective pressure [6], under conditions of constant injection timing.…”

“…A biodiesel mixture of animal fat was used to fuel a diesel engine at full engine load, with the same injection timing and injection pressure in by the authors of [6]. Because of the lower heating value of biodiesel compared to diesel fuel, the use of biodiesel led to a reduction in maximum pressure and indicated mean effective pressure [6], under conditions of constant injection timing. Animal fats were used in a composition of diesel fuel blend in order to fuel a 2 L turbocharged diesel engine, and the effects on indicated mean effective pressure and break mean effective pressure are presented by the authors of [7].…”

Particulate emissions from biodiesel fuelled CI engines

“…It is important from regulatory norms stand point to evaluate the particle number emissions for biodiesel. Pham et al [140] reported that saturated short-chain length FAMEs reduce NOx and particulate number concentration, but led to higher BSFC as well as higher ROS emissions. Unsaturated FAMEs emit lower particulate and ROS, but higher NOx.…”

“…Several studies showed that biodiesel and mineral diesel have different particle size-number distributions [25,30,140]. It is important from regulatory norms stand point to evaluate the particle number emissions for biodiesel.…”