BTX from the gas-phase hydrodeoxygenation and transmethylation of guaiacol at room pressure

作者：Xu, Xiwei; Jiang, Enchen^*; Du, Yanhong; Li, Bosong

来源：Renewable Energy, 2016, 96: 458-468.

DOI：10.1016/j.renene.2016.04.094

• Lignin
• BTX
• Hydrodeoxygenation
• Transmethylation
• Fe/Ni/HBeta catalyst

Biosourced aromatics (benzene toluene xylene (BTX) and phenols) could be obtained by catalytic hydrodeoxygenation (HDO) coupled with transmethylation at atmospheric pressure in a fixed-bed reactor. We choose guaiacol as a model compound to investigate the catalytic HDO over Fe/Ni/HBeta catalyst. The active amount (5%-15%), temperature (250-400 degrees C), and 1/WHSV (1.5-4.0) significantly influenced the hydrogenolysis of the C-aromatic-O bond and transmethylation. The mechanism showed that feed and intermediate products formed the "surface pool" on the catalyst surface, which enabled the HDO reaction by the reduced intermediate species (Z-FeH2+ and Z-NiH+). Fe/Ni/HBeta exhibited good activity for both methyl transfer and HDO. Moreover, the aromatic ring did not undergo catalytic hydrogenation, and most methyl or methoxyl molecules transferred onto the phenolic or benzene ring and remained after deoxygenation. Consequently, carbon loss was minimized, and hydrogen consumption was reduced.

• 出版日期2016-10
• 单位华南农业大学; 华南热带农业大学; 中国热带农业科学院; 中国科学院广州能源研究所; 中国热带农业科学院椰子研究所