Investigação das blendas de sebo bovino no desempenho e emissões em um motor ciclo diesel.

Abstract

The growing demand for energy and environmental concerns have made clean energy production a priority in the 21st century. Biodiesel emerge as a promising alternative to reduce atmospheric pollution caused by the burning of fossil fuels. The use of residual raw materials, such as animal tallow, represents a sustainable solution by transforming waste into energy, reducing environmental impacts and contributing to the circular economy. Bovine tallow is currently the second main raw material used in biodiesel production in Brazil, although there are still few studies on its performance and emissions in diesel engines. The present study aimed to evaluate the specific fuel consumption and emissions of a single-cylinder diesel engine operating with different blends of beef tallow biodiesel (B10, B20, B30 and B100) under five different loads. Specific fuel consumption (SFC), exhaust gas temperature (EGT), and emissions of NOₓ, HC, CO and CO₂ were analyzed. It was observed that the specific consumption of the biodiesel blends was higher than that of fossil diesel due to their lower calorific value; however, a tendency for reduction was seen at higher loads. The results indicated good engine performance and lower NOₓ emissions compared to conventional diesel, confirming the potential of animal tallow biodiesel as a renewable and cleaner environmental alternative.