Comparative analysis of the asphaltene stabilizing efficiency of Anacardium occidentale peel oil and commercial products
DOI:
https://doi.org/10.29019/enfoqueute.v11n3.643Keywords:
Anacardium occidentale; crude oil; asphaltenes; inhibitor; flocculationAbstract
The research objective was to compare the inhibiting and stabilizing efficiency of asphaltenes from Anacardium occidentale (CNSL) husk oil mixtures in diesel and commercial dispersant products, to evaluate the oil as an alternative anti-asphaltenes chemical treatment of crude oil. The precipitation flocculation onset with n-heptane and the dispersion point by addition of xylene were determined, both by direct observation of asphaltenes floc formation under an optical microscope. The experimental design used was factorial, with four response variables (flocculation onset, inhibitory activity, instability index and stabilization efficiency) and two experimental factors (product and dose). Five products with CNSL and three commercial products, all in doses 2, 4, 6 and 8 µl in 10 ml of a medium crude oil sample, were evaluated. The statistical analysis was based on multifactorial ANOVA and Fisher's minimal significant difference test (LSD) with α = 0.05. It was obtained that the two experimental factors significantly influenced the individual response variables and also their interactions. The products with CNSL were more efficient as inhibitors and the commercial ones more efficient as stabilizers.
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