DBPapers
DOI: 10.5593/SGEM2014/B42/S18.024

OLEFINS PRODUCTION BY STEAM CRACKING OF WASTE VEGETABLE OIL. PRELIMINARY STUDY

C. I. Koncsag, A. E. Sterpu, A. I. Dumitru, T. Chis
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4, Vol. 2, 183-190 pp

ABSTRACT
This work continues other authors’ efforts to find renewable resources for the
production of olefins, either by thermal cracking or by steam cracking. In this
preliminary study, the waste frying oil was steam cracked in a micropilot plant
containing a continuous flow reactor with controlled temperature and a section for the
separation of products. The reaction took place at 650oC with a water-to-feed ratio 1:1
vol/vol. The composition of the cracked gas was determined by up-to–date chromatographic analysis methods: Refinery Gas Analysis developed by Wasson on
Agilent 6890 N with multiple columns and different detectors and Sulfur Compounds
Analysis on Agilent 7890 A with chemiluminiscence detector. The gases total yield was 55.6% wt and the chromatogram confirmed good yields in ethylene (32 %) and
propylene (9.8%) as well as other valuable components: hydrogen (7.2%), methane
(18%), ethane (9.2 %) and propane (1.3%). A liquid by-product, representing 44.4% wt
of the raw can be used as a component as burners fuel, having better burning properties than the vegetable oil. The preliminary study indicates that the steam cracking of waste vegetable oil is feasible with good results. This process can be an alternative to other methods for the recovery of waste vagetable oils.

Keywords: olefin production, steam cracking, vegetable oil

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