[en] Bio-oils produced from the pyrolysis of lignocellulosic biomass are rich in oxygen, which causes instability and corrosion problems. Therefore, dedicated post-pyrolysis treatments such as hydrotreatment are required to increase the H/C ratio of the products to be used as fuel or chemicals. Here, a characterization method based on two-dimensional gas chromatography (GC×GC) was developed to highlight the evolution of the volatile fraction during hydrotreatment. Six samples obtained at different times of the hydrotreatment were analyzed. In this way, information on catalyst deactivation was obtained. The combination of information from normal and reversed phase GC×GC analysis provides a detailed characterization of the hydrotreated bio-oils. Furthermore, the use of soft photoionization (PI), in addition to conventional electron impact ionization (EI), yields a better understanding of the compound structures present in the sample. Identification and semi-quantification of the sample components indicate that the concentration of paraffins, cycloalkanes, and monoaromatics have largely decreased during hydrotreatment, while the concentration of oxygenated species and polycyclic aromatic hydrocarbons have increased. Using complementary GC methods highlights changes in the molecular composition of volatile species that correlate with catalyst performance. This approach can be used to follow the decrease in hydrodeoxygenation activity as a function of time on stream to estimate the catalyst aging during the hydrotreating process.
Disciplines :
Chemistry
Author, co-author :
Lazzari, Eliane ; Université de Liège - ULiège > Molecular Systems (MolSys) ; TotalEnergies One Tech, R&D, Downstream Processes & Polymers, TotalEnergies Research & Technology Gonfreville, BP 27, Harfleur, France ; International Joint Laboratory, iC2MC: Complex Matrices Molecular Characterization, TRTG, Harfleur, France
Mase, Charlotte; TotalEnergies One Tech, R&D, Downstream Processes & Polymers, TotalEnergies Research & Technology Gonfreville, BP 27, Harfleur, France ; International Joint Laboratory, iC2MC: Complex Matrices Molecular Characterization, TRTG, Harfleur, France
Dayton, David C.; RTI International, Technology Advancement and Commercialization, United States
Marceau, Sabrina; TotalEnergies One Tech, R&D, Downstream Processes & Polymers, TotalEnergies Research & Technology Gonfreville, BP 27, Harfleur, France ; International Joint Laboratory, iC2MC: Complex Matrices Molecular Characterization, TRTG, Harfleur, France
Purcaro, Giorgia ; Université de Liège - ULiège > TERRA Research Centre > Chemistry for Sustainable Food and Environmental Systems (CSFES)
Focant, Jean-François ; Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique, organique et biologique
Piparo, Marco; TotalEnergies One Tech, R&D, Downstream Processes & Polymers, TotalEnergies Research & Technology Gonfreville, BP 27, Harfleur, France ; International Joint Laboratory, iC2MC: Complex Matrices Molecular Characterization, TRTG, Harfleur, France
Giusti, Pierre; TotalEnergies One Tech, R&D, Downstream Processes & Polymers, TotalEnergies Research & Technology Gonfreville, BP 27, Harfleur, France ; International Joint Laboratory, iC2MC: Complex Matrices Molecular Characterization, TRTG, Harfleur, France
Language :
English
Title :
Exploring molecular composition of upgraded pyrolysis bio-oil using GC×GC-(EI/PI)-TOF MS with different column set-ups
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