Stability mechanism investigation of emulsion fuels from biomass pyrolysis oil and diesel

Zuogang Guo, Shurong Wang and Xiangyu Wang

Energy, 2014, vol. 66, issue C, 250-255

Abstract: In this paper, emulsion fuels from crude bio-oil and its molecular distillation fractions were prepared by single ultrasonic and ultrasonic-mechanical emulsification. The results showed that the emulsions from crude bio-oil and 0# diesel had the best stability, with a stability time of 31 days. The stability time of the bio-oil middle fraction emulsion was 216 min, while that of the bio-oil heavy fraction emulsion was as low as 14 min. The particle size distributions of the emulsions were analyzed by a Malvern particle size analyzer. Emulsion fuels made from crude bio-oil and the bio-oil middle fraction had a smaller droplet size of 8–60 nm. In contrast, the emulsion fuel from the alcohol-diluted bio-oil heavy fraction had much larger droplet size, reaching up to 6000 nm. Compared with single ultrasonic emulsification, ultrasonic-mechanical emulsification had positive effects on increasing the stability time of the crude bio-oil emulsion, but negative effects on the stability time of the bio-oil middle and heavy fraction emulsions. To explain the above differences, spherical shell mechanism models were proposed according to the composition properties of the crude bio-oil and its fractions.

Keywords: Biomass; Pyrolysis; Bio-oil; Molecular distillation; Emulsion fuels (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (14)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:66:y:2014:i:c:p:250-255

DOI: 10.1016/j.energy.2014.01.010

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