Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 24, Issue 11, Pages 9951-9961Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-016-7704-z
Keywords
Waste frying oil; Pyrolysis; Bio-oil; FTIR; GC/MS
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In this present work, the disposal of waste frying oil was explored. The experiment tests were performed under nitrogen (N-2) atmosphere at 5 degrees C/min heating rate from the ambient temperature to 500 degrees C. In these operating conditions, the obtained pyrolitic liquid fraction was 76 wt% formed by 63.87 wt% of crude bio-oil and 12.13 wt% of aqueous fraction. The chemical characterization using FTIR, GC, and GC/MS has revealed that the bio-oil is a complex chemical mixture of linear saturated, unsaturated, and cyclic hydrocarbons and oxygenated compounds such as carboxylic acids, ketones, aldehydes, and alcohols. Moreover, the produced bio-oil can be considered as promising fuel with high calorific value (similar to 39 MJ/kg). However, the higher acidity (similar to 125 mg KOH/g sample) and viscosity (9.53 cSt at 40 degrees C) limit currently its direct use in engines. Therefore, although several promising results, further investigations are requested to improve the bio-oil quality in order to find an environmentally friendly issue to waste frying oil.
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