The Synergy of the Support Acid Function and the Metal Function in the Catalytic Hydrodeoxygenation of m-Cresol

被引：124
|
作者：
Foster, Andrew J. [1 ,2 ]
Do, Phuong T. M. [1 ,2 ]
Lobo, Raul F. [1 ,2 ]
机构：
[1] Univ Delaware, Ctr Catalyt Sci & Technol, Newark, DE 19716 USA
[2] Univ Delaware, Catalysis Ctr Energy Innovat, Dept Chem Engn, Newark, DE 19716 USA
来源：
TOPICS IN CATALYSIS | 2012年 / 55卷 / 3-4期
关键词：
Hydrodeoxygenation; Platinum catalyst; Hydrogenation; Dehydration; m-Cresol; Phenolic; Pyrolysis oil; Biomass conversion; FAST PYROLYSIS; BIO-OILS; METHYLCYCLOHEXANE DEHYDROGENATION; SUBSTITUTED PHENOLS; PALLADIUM CATALYSTS; MODIFIED ALUMINAS; BASE PROPERTIES; HYDROGENATION; BIOMASS; PLATINUM;
D O I：
10.1007/s11244-012-9781-7
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The hydrodeoxygenation (HDO) of m-cresol is investigated as a model for the HDO of phenolic compounds from lignin pyrolysis. Pt catalysts supported on gamma-Al2O3 and SiO2 are effective for the conversion of m-cresol to toluene and methylcyclohexane at 533 K and 0.5 atm H-2. Experiments using Pt/gamma-Al2O3 show that the reaction proceeds by a combination of Pt-catalyzed hydrogenation and acid-catalyzed dehydration reactions. Dehydration of a partially hydrogenated oxygenate intermediate is most likely the dominant reaction pathway to toluene. The acidity of the gamma-Al2O3 support was modified by base (K2CO3) and acid (NH4F) treatments, and increasing the number and strength of acid sites was found to increase the rate of HDO. Pt/SiO2 was more active for m-cresol HDO than Pt/Al2O3. The reaction rate on Pt/Al2O3 and Pt/SiO2 decreased after 5 h on stream, but Pt/Al2O3 regained initial reactivity after reductive treatment in H-2.
引用
收藏
页码：118 / 128
页数：11
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