Oxidative desulfurization of tire pyrolysis oil
2016
This paper presents a low cost method for the purification of oils obtained
from the pyrolysis of used tires. Oxidative desulfurization is a promising
route for purification of tire pyrolysis oils as hydro-desulfurization may
not be affordable for small scale industries. Different additives and acids
have been employed for the enhancement of properties of pyrolytic oils. The
experimental conditions were kept identical throughout, i.e. atmospheric
pressure and 50°C temperature for comparison of performance of various
additives. The use of hydrogen peroxide-acetic acid mixture (10 wt.%) was
found more economical and effective in desulfurization and improvement of
fuel properties of sample oils. The contribution of sulfuric acid in
desulfurization and decreasing viscosity was also satisfactory but due to
high price of concentrated sulfuric acid its use may not be economical.
Calcium oxide and Fuller’s earth was not found to be effective in
desulfurization. Results indicate that oxidative desulfurization could render
tire pyrolysis oils suitable for blending as heating fuel.
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