Enhancement of biofuels production by means of co-pyrolysis of Posidonia oceanica (L.) and frying oil wastes: Experimental study and process modeling

Kaouther Zaafouri; Aida Ben Hassen Trabelsi; Samah Krichah; Aymen Ouerghi; Abdelkarim Aydi; Carlos Alberto Claumann; Zibetti André Wüst; Silm Naoui; Latifa Bergaoui; Moktar Hamdi

doi:10.1016/j.biortech.2016.02.004

Enhancement of biofuels production by means of co-pyrolysis of Posidonia oceanica (L.) and frying oil wastes: Experimental study and process modeling

Bioresour Technol. 2016 May:207:387-98. doi: 10.1016/j.biortech.2016.02.004. Epub 2016 Feb 15.

Affiliations

¹ Laboratory of Microbial Ecology and Technology, LETMi-INSAT, The National Institute of Applied Sciences and Technology INSAT, Carthage University, 2 Boulevard de la Terre, B.P 676, 1080 Tunis, Tunisia.
² Research and Technology Center of Energy CRTEn, Borj-CedriaTechnopark, B.P N°95, 2050 Hammam Lif, Tunisia.
³ Laboratory of Microbial Ecology and Technology, LETMi-INSAT, The National Institute of Applied Sciences and Technology INSAT, Carthage University, 2 Boulevard de la Terre, B.P 676, 1080 Tunis, Tunisia; Research and Technology Center of Energy CRTEn, Borj-CedriaTechnopark, B.P N°95, 2050 Hammam Lif, Tunisia.
⁴ Department of Chemical and Materials Engineering, College of Engineering, Northern Border University, P.O. Box 1321, Arar, Saudi Arabia; Laboratory of Materials Molecules and Applications, Preparatory Institute for Scientific and Technical Studies, Carthage University, B.P 51, La Marsa, 2075 Tunis, Tunisia.
⁵ Departments of Chemical Engineering and Food Engineering, Universidade Federal de Santa Catarina, 88010-970, Brazil.
⁶ Laboratory of Materials Chemistry and Catalysis, Faculty of Sciences of Tunis, El Manar University, Tunis, Tunisia.

PMID: 26897417
DOI: 10.1016/j.biortech.2016.02.004

Abstract

Energy recovery from lignocellulosic solid marine wastes, Posidonia oceanica wastes (POW) with slow pyrolysis responds to the growing trend of alternative energies as well as waste management. Physicochemical, thermogravimetric (TG/DTG) and spectroscopic (FTIR) characterizations of POW were performed. POW were first converted by pyrolysis at different temperatures (450°C, 500°C, 550°C and 600°C) using a fixed-bed reactor. The obtained products (bio-oil, syngas and bio char) were analyzed. Since the bio-oil yield obtained from POW pyrolysis is low (2wt.%), waste frying oil (WFO) was added as a co-substrate in order to improve of biofuels production. The co-pyrolysis gave a better yield of liquid organic fraction (37wt.%) as well as syngas (CH4,H2…) with a calorific value around 20MJ/kg. The stoichiometric models of both pyrolysis and co-pyrolysis reactions were performed according to the biomass formula: CαHβOγNδSε. The thermal kinetic decomposition of solids was validated through linearized Arrhenius model.

Keywords: Biofuels; Co-pyrolysis; Modeling; Posidonia oceanica wastes; Waste frying oil.

MeSH terms

Alismatales / chemistry*
Biofuels*
Biomass
Charcoal
Conservation of Energy Resources / methods
Kinetics
Models, Theoretical
Waste Management / methods*

Substances

Biofuels
biochar
Charcoal