Pyrolysis of lipid wastes under different atmospheres: vacuum, nitrogen and methane

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Pyrolysis of high acidity olive oil, olive husk oil and animal fat was carried out under different atmospheres (vacuum, N2 and CH4), at constant temperature and different residence times. Bio-oils were the main pyrolysis products, with mass yields from 55.2% to 88.9%. The use of nitrogen or methane atmospheres led to an increase in the formation of gas products (14.1% to 26%), while increasing the residence time resulted in higher yields of gases and solids. The pyrolysis bio-oils contained 54.4% to 88.7% (w/w) of distillable liquids, collected as a light fraction and a heavy fraction. Both fractions were analysed by GC-MS to determine the hydrocarbon profiles and identification of functional groups. Vacuum pyrolysis promoted the formation of low molecular weight liquids while the use of a methane atmosphere increased the relative concentration of aliphatic components in the bio-oil.

Original languageEnglish
Title of host publicationWASTES - Solutions, Treatments and Opportunities II - Selected papers from the 4th edition of the International Conference Wastes: Solutions, Treatments and Opportunities, 2017
EditorsMaria de Lurdes Lopes, Cândida Vilarinho, Fernando Castro
PublisherCRC Press/Balkema
Pages425-430
Number of pages6
ISBN (Print)9781138196698
DOIs
Publication statusPublished - 1 Jan 2018
Event4th International Conference Wastes: Solutions, Treatments and Opportunities, WASTES 2017 - Porto, Portugal
Duration: 25 Sep 201726 Sep 2017

Conference

Conference4th International Conference Wastes: Solutions, Treatments and Opportunities, WASTES 2017
CountryPortugal
CityPorto
Period25/09/1726/09/17

Keywords

  • Pyrolysis
  • vegetable oils
  • fats
  • methane atmosphere
  • Vacuum

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