Article Dans Une Revue Journal of Cleaner Production Année : 2021

Catalytic hydrothermal conversion of algal residue to bio-bitumen

Anne Elisabeth Fontaine
  • Fonction : Auteur

Résumé

After extraction of high-added value components of Spirulina sp., the remaining residues can be valorized by hydrothermal liquefaction to produce an oily water insoluble viscous phase (biocrude) which is very similar to petroleum bitumen. This hydrophobic fraction is composed of various NO O-containing cyclic compounds, fatty acids, amides, nitriles, alkenes and alkanes. In order to optimize the rheological properties of the biocrude, we studied the addition of different catalysts with various loadings: ZrO2 or CeO2, or Ce(NO3)3.6H2O as well as the effect of residence time during HTL. The biocrude has been systematically characterized by GCxGC, GPC, elemental analyses and dynamic shear rheology and compared to a petroleum bitumen. The different catalysts tested had little influence on the composition of the HTL hydrophobic fraction in the chosen operating conditions. In contrast, increasing the reaction time (from 1 to 7 h) was found to promote condensation reactions, thereby increasing the average molecular weight of the biocrude, leading to a viscoelastic material very similar to a petroleum bitumen.

Domaines

Fichier principal
Vignette du fichier
Manuscrit J Cleaner Production.pdf (1.51 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-03373052 , version 1 (11-10-2021)

Licence

Identifiants

Citer

Laura Carolina Cardenas Velandia, Anne Elisabeth Fontaine, Denis Loquet, Ruben Checa, Chantal Lorentz, et al.. Catalytic hydrothermal conversion of algal residue to bio-bitumen. Journal of Cleaner Production, 2021, 322, pp.129024. ⟨10.1016/j.jclepro.2021.129024⟩. ⟨hal-03373052⟩
161 Consultations
313 Téléchargements

Altmetric

Partager

  • More