Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 106, Issue 2, Pages 469-474Publisher
SPRINGER
DOI: 10.1007/s10973-011-1408-x
Keywords
Blends; Heat of combustion; Biodiesel
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The Brazilian government has presented a biofuel program, which aims the addition of 2% of biofuel in fossil diesel in 2008 and 5% up to 2013. Thus, the knowledge of heat of combustion of biofuel/diesel blends is necessary. The biodiesel was produced by transesterification of soybean oil with a yield of 87%. The diesel-like was obtained by pyrolysis of soybean oil. This biofuel presented all parameters according to ANP. The obtained heats of combustion were 41.36 +/- A 0.17; 38.70 +/- A 0.16; and 36.71 +/- A 0.17 MJ/kg for diesel, diesel-like and biodiesel, respectively. The results show that the heats of combustion of biofuels are approximately 17% smaller than fossil diesel. The obtained data also show that the heats of combustion depend on the methodology used for the biofuel production. Addition of biofuels to traditional diesel fuel results in a linear decreasing of the heat of combustion with the amount of the alternative fuel added to the diesel.
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