Selective and reusable Pt-WOx/Al2O3 catalyst for deoxygenation of fatty acids and their esters to diesel-range hydrocarbons

被引：58
|
作者：
Janampelli, Sagar [1 ,2 ]
Darbha, Srinivas [1 ,2 ]
机构：
[1] Natl Chem Lab, CSIR, Catalysis & Inorgan Chem Div, Pune 411008, Maharashtra, India
[2] Acad Sci & Innovat Res AcSIR, New Delhi 110001, India
来源：
CATALYSIS TODAY | 2018年 / 309卷
关键词：
Deoxygenation; Fatty acids; Biofuels; Diesel-range hydrocarbons; Pt catalyst; OLEIC-ACID; VEGETABLE-OILS; GLYCEROL HYDROGENOLYSIS; PT/SAPO-11; CATALYST; STEARIC-ACID; DECARBOXYLATION; HYDRODEOXYGENATION; CONVERSION; WOX;
D O I：
10.1016/j.cattod.2017.06.030
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Tungsten oxide promoted platinum catalysts (Pt-WOx/Al2O3) of varying composition were prepared by wet impregnation method and reduced in hydrogen atmosphere. X-ray powder diffraction and photoelectron spectroscopy revealed that Pt is completely reduced to metallic state while tungsten is in + 6 and + 5 oxidation states. Pt crystallite and particle sizes increased (from 1.2 to 1.4 nm and 2.5 to 3 nm, respectively) in presence of WOx (CO-chemisorption and transmission electron microscopy). Tungsten addition augmented strong acid sites. It enhanced significantly the catalytic activity of Pt/Al2O3 in deoxygenation of fatty acids and their methyl esters. Tungsten altered the reaction pathway from decarbonylation/decarboxylation to hydrodeoxygenation. A catalyst with 4 wt% Pt and 8 wt% W exhibited high catalytic performance. Complete conversion of oleic acid and octadecane product selectivity in the range 67.1-80.8% was obtained. Pt-WOx/Al2O3 is a stable and reusable fatty acid deoxygenation catalyst.
引用
收藏
页码：219 / 226
页数：8
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