Skip to Main content Skip to Navigation
Theses

Hydrodésoxygénation de composés phénoliques modèles. Évaluation de phases actives : sulfures, oxyde, métallique et phosphure

Abstract : In a biorefinery, biomass can be converted by different process (thermal, chemical and biochemical) into fuels and valued-added chemicals. More specifically, the catalytic hydrodeoxygenation (HDO) process could upgrade both bio-oils obtained from pyrolysis into biofuels and oxygenated aromatic compounds from the depolymerization of lignin into aromatics.In order to model the deoxygenation of these fractions, the cresol isomers (ortho, meta and para-cresol) were chosen as model oxygenated molecules. The reactions were carried out under high pressure (2-4 MPa) and temperatures between 250 and 340° C. Several active phases based on molybdenum (sulphides and oxide) and nickel (metal and phosphide) have been studied. The influence of the support of the molybdenum oxide phases (SiO2, SBA-15, Al2O3) and of the nickel-based phases (SiO2 and ZrO2) was also examined.Under these experimental conditions, phenolic compounds are deoxygenated by two parallel pathways. The direct deoxygenation (DDO) route only leads to toluene by hydrogenolysis of the C-O bond. The hydrogenating route (HYD), on the other hand, leads to a mixture of products obtained through the hydrogenation of cresol aromatic ring, involving hydrogenolysis, hydrogenation, dehydration and isomerization reactions. The activity of the catalysts as well as the contribution of each deoxygenation pathway are dependent on the active phase studied, on the support chosen as well as on the operating conditions used.
Document type :
Theses
Complete list of metadatas

Cited literature [355 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01980874
Contributor : Abes Star :  Contact
Submitted on : Monday, January 14, 2019 - 5:05:13 PM
Last modification on : Wednesday, January 16, 2019 - 2:06:13 PM

File

2017-Oliveira-Vinicius-Ottonio...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01980874, version 1

Collections

Citation

Vinicius Ottonio Oliveira Gonçalves. Hydrodésoxygénation de composés phénoliques modèles. Évaluation de phases actives : sulfures, oxyde, métallique et phosphure. Catalyse. Université de Poitiers, 2017. Français. ⟨NNT : 2017POIT2266⟩. ⟨tel-01980874⟩

Share

Metrics

Record views

116

Files downloads

181