Abstract

TOBIO-PEREZ, Indira et al. Evaluation of mixtures of Jatropha curcas (L.) biodiesel in diesel engine banks. Pastos y Forrajes [online]. 2018, vol.41, n.4, pp.300-309. ISSN 0864-0394.

The objective of this study was to evaluate different mixtures of the biodiesel extracted from Jatropha curcas in diesel engine benchs, for their later use in agricultural transportation in Cuba. For such purpose, mixtures of diesel fuel were prepared with 5, 10, 15 and 20 % of this biofuel. The engines' performance, emissions of pollutant gases and combustion parameters were evaluated; likewise, the level of biodiesel content that can be included in the fuel mixture was defined. Among the most important results, an increase in the specific consumption of fuel was shown as the biodiesel percentage in the mixture and the pressure in the combustion chamber increased; as well as a decrease of the ignition delay time, due to the higher cetane number of the biodiesel compared with diesel. In the case of the fuel injection system, an increase of the injection pressure was recorded when using biodiesel. A reduction was shown of CO, NOx and CO₂ emissions when up to 20 % was mixed, for which it is considered to be an adequate percentage, although it is necessary to conduct engine durability tests.

Keywords : combustion; pollutants; density; viscosity.

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