Catalytic Upgrading of Bio-oil over Ni-Based Catalysts Supported on Mixed Oxides

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• 作者：Xinghua Zhang ; Jinxing Long ; Wei Kong ; Qi Zhang ; Luangang Chen ; Tiejun Wang ; Longlong Ma ; Yuping Li
• 刊名：Energy & Fuels
• 出版年：2014
• 出版时间：April 17, 2014
• 年：2014
• 卷：28
• 期：4
• 页码：2562-2570
• 全文大小：430K
• 年卷期：v.28,no.4(April 17, 2014)
• ISSN：1520-5029

文摘

Ni-Based catalysts using mixed oxides of Al₂O₃鈥揝iO₂, Al₂O₃鈥揟iO₂, TiO₂鈥揝iO₂, and TiO₂鈥揨rO₂ as supports were evaluated for hydrotreatments using guaiacol as the model compound and characterized by N₂ physical adsorption, X-ray diffraction (XRD), temperature-programmed desorption of ammonia (NH₃-TPD), and temperature-programmed reduction of hydrogen (H₂-TPR) techniques. The influence of the support, solvent, reaction temperature, and pressure on guaiacol conversion and product distributions were determined. Guaiacol conversion of 100% with cyclohexane selectivity of 86.4% was obtained over the Ni/TiO₂鈥揨rO₂ catalyst at the conditions of 300 掳C, 4.0 MPa H₂ pressure, and decalin solvent. Furthermore, this system is also efficient for real bio-oil, where nearly 19.3% of the upgraded bio-oil yield was achieved under the optimal conditions determined for guaiacol. Gas chromatography鈥搈ass spectrometry (GC鈥揗S) analysis showed that the principal components were phenolic compounds, while the content of acids and aldehydes was negligible. The pH of bio-oil increased from 2.38 to 4.21, and the high heating value drastically increased from 13.1 to 25.8 MJ/kg.