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Experimental Study of Nanoadditives for Biofuel Combustion Improvement

[+] Author Affiliations
Calvin Hong Li

Villanova University, Villanova, PA

Paper No. IMECE2011-62357, pp. 1727-1734; 8 pages
doi:10.1115/IMECE2011-62357
From:
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 4: Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy, Parts A and B
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5490-7
  • Copyright © 2011 by ASME

abstract

An experimental investigation of the combustion behavior of nano-aluminum (n-Al) and nano-aluminum oxide (n-Al2 O3 ) particles, stably suspended in biofuel (ethanol) as a secondary energy carrier was conducted. The heat of combustion (HoC) was studied using a modified static bomb calorimeter system. Combustion element composition and surface morphology were evaluated using a SEM/EDS system. N-Al and n-Al2 O3 particles of 50 nm and 36 nm diameters, respectively, were utilized in this investigation. Combustion experiments were performed with volume fractions of 1%, 3%, 5%, 7%, and 10% for n-Al, and 0.5%, 1%, 3%, and 5% for n-Al2 O3 . The results indicate that the amount of heat released from ethanol combustion increases almost linearly with n-Al concentration. N-Al volume fractions of 1% and 3% did not show enhancement in the average volumetric heat of combustion, but higher volume fractions of 5%, 7%, and 10% increased the volumetric heat of combustion by 5.82%, 8.65%, and 15.31%, respectively. N-Al2 O3 and heavily passivated n-Al additives did not participate in combustion reactively, and there was no contribution from Al2 O3 to the HoC in the tests. A combustion model that utilized Chemical Equilibrium with Applications (CEA) was conducted as well and was shown to be in good agreement with the experimental results.

Copyright © 2011 by ASME
Topics: Combustion , Biofuel

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