Hydrotreatment of pyrolysis liquids derived from second-generation bioethanol production residues over NiMo and CoMo catalysts
| Autor: | Idoia Hita, Peter J. Deuss, Hero J. Heeres, Neil Priharto, Wolter Prins, Frederik Ronsse |
|---|---|
| Přispěvatelé: | Chemical Technology |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
020209 energy
Batch reactor FEEDSTOCKS BIOFUELS 02 engineering and technology BIO-OIL PRETREATMENT Raw material Catalysis chemistry.chemical_compound Pyrolysis oil Sulfided catalysts 0202 electrical engineering electronic engineering information engineering Organic chemistry Lignin-rich digested stillage Cellulose BIOMASS PYROLYSIS Waste Management and Disposal Deoxygenation Hydrotreatment OF-THE-ART Renewable Energy Sustainability and the Environment TECHNOECONOMIC ANALYSIS HYDRODEOXYGENATION Pyrolysis liquids Biobased chemicals Forestry CONVERSION chemistry Agronomy and Crop Science Pyrolysis Hydrodeoxygenation LIGNIN |
| Zdroj: | Biomass & Bioenergy, 126, 84-93. Wiley |
| ISSN: | 1873-2909 0961-9534 |
| DOI: | 10.1016/j.biombioe.2019.05.005 |
| Popis: | Lignin-rich digested stillage from second-generation bioethanol production is a unique biomass-derived feedstock, not only because it contains high amounts of lignin but also due to its residual amounts of cellulose and hemicellulose. In this study, catalytic hydrotreatment experiments were conducted on pyrolysis liquids obtained from the lignin-rich feedstock using sulphided NiMo/Al2O3 and CoMo/Al2O3 catalysts. The aim was to obtain a high conversion of the initial pyrolysis feed into a hydrotreated oil with a high phenolics and aromatics fractions. Experiments were carried out in a stirred batch reactor at 350 degrees C and 10 MPa of H-2 (initial pressure). Product oils were obtained in about 60-65% w/w, the remainder being an aqueous phase (12-14% w/w), solids (7-8% w/w) and gas phase components (all on initial pyrolysis oil feed basis). The product oils were characterised in detail using various techniques (elemental composition, GCxGC-FID, GPC, and 2D HSQC NMR). The oxygen content was reduced from 23% w/w in the pyrolysis oils to 7.5-11.5% in the hydrotreated oils, indicative of the occurrence of hydrodeoxygenation reactions. This was also evident from the chemical composition, showing an increase in the amounts of low molecular weight aromatics, alkylphenolics, alkanes and cycloalkanes in hydrotreated oils. Performance of the two catalysts was compared, and a higher degree of deoxygenation was observed for the NiMo catalyst. The implications of the findings for the valorisation of second-generation bioethanol residues are also discussed. |
| Databáze: | OpenAIRE |
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