Catalytic hydrotreatment of bio-oil from continuous HTL of Chlorella sorokiniana and Chlorella vulgaris microalgae for biofuel production - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Catalytic hydrotreatment of bio-oil from continuous HTL of Chlorella sorokiniana and Chlorella vulgaris microalgae for biofuel production

C. Lorentz
L. Matricon
  • Fonction : Auteur
L.A. Ramirez Romero
  • Fonction : Auteur
P. Chambonniere
  • Fonction : Auteur
F. Delrue
  • Fonction : Auteur
A. Roubaud
  • Fonction : Auteur

Résumé

The constantly growing demand for energy and the concern about energy security and the environment motivate the production of fuels and chemicals from different sustainable raw materials. Microalgae are considered for producing third-generation biofuels due to their capacity to grow rapidly and the potential for CO2 fixation. In this context, continuous hydrothermal liquefaction (HTL) of carbohydrate-rich microalga, Chlorella sorokiniana (CS) NIES 2273, and lipid-rich microalga, Chlorella vulgaris (CV) NIES 227, was performed. Then, the bio-oil was hydrotreated (HDT) over sulfided NiW/Al2O3. HTL and HDT oils were characterized by elemental analysis, GPC, 13C and 31P-NMR, SimDis, and GCxGC-MS/FID. In HTL oils, C16 and C18 carboxylic acids were the major components found, reaching 28 wt.% and 34 wt.% of bio-oil from CS and CV, respectively. C16 and C18 fatty amides were also found in both HTL oils, with higher concentrations in the CV bio-oil. These fatty molecules were converted during the hydrotreatment step resulting in a biofuel composed mainly of C15-C18 aliphatics hydrocarbons that felt primarily in the diesel range. The bio-oil from CV showed a lower aromaticity degree, lower O/C and N/C ratio, and higher H/C ratio, whereas the bio-oil from CS was more challenging to upgrade and showed higher amounts of cyclic oxygen and nitrogen compounds, such as phenols and pyrroles. Three times higher amounts of lipids in the CV microalgae led to three times higher biofuel production. Lastly, analysis of the used hydrotreating catalysts showed iron accumulation on both catalysts after upgrading and a similar coke structure.
Fichier non déposé

Dates et versions

hal-03885756 , version 1 (06-12-2022)

Identifiants

  • HAL Id : hal-03885756 , version 1

Citer

B. Magalhaes, R. Checa, C. Lorentz, P. Afanasiev, D. Laurenti, et al.. Catalytic hydrotreatment of bio-oil from continuous HTL of Chlorella sorokiniana and Chlorella vulgaris microalgae for biofuel production. Hôtel Europole de Grenoble, Dec 2022, Grenoble, France. ⟨hal-03885756⟩
38 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More