Nickel on nitrogen-doped carbon pellets for continuous-flow hydrogenation of biomass-derived compounds in water

被引:55
作者
Brandi, Francesco [1 ]
Baeumel, Marius [1 ]
Molinari, Vaterio [1 ]
Shekova, Irina [1 ]
Lauermann, Iver [2 ]
Heil, Tobias [1 ]
Antonietti, Markus [1 ]
Al-Naji, Majd [1 ]
机构
[1] Mar Planck Inst Colloids & Interfaces, Dept Colloids Chem, D-14476 Potsdam, Germany
[2] Helmholtz Zentrum Berlin Mat & Energie GmbH, PVcomB, Schwarzschildstr 3, D-12489 Berlin, Germany
关键词
AQUEOUS-PHASE HYDROGENATION; ADDED-VALUE CHEMICALS; LIGNOCELLULOSIC BIOMASS; SUPPORTED RUTHENIUM; SELECTIVE HYDROGENATION; CATALYTIC-HYDROGENATION; METAL NANOPARTICLES; PLATFORM MOLECULES; HIGH-PERFORMANCE; D-GLUCOSE;
D O I
10.1039/c9gc03826d
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Hydrogenation reactions in water at elevated temperatures are challenging for heterogeneous catalysts. Thus, we present a simple, cheap, scalable, and sustainable approach for synthesizing an efficient and stable Ni catalyst supported on highly porous nitrogen-doped carbon (NDC) in pellet form. The performance of this catalyst was evaluated in the aqueous-phase hydrogenation of lignocellulosic biomassderived compounds, i.e., glucose (Glu), xylose (Xyl), and vanillin (V), using a continuous-flow system. The as-prepared 35 wt% Ni on NDC catalyst exhibited a high catalytic performance in all three aqueous-phase hydrogenation reactions, i.e., the conversion of Glu, Xyl, and V was 96.3 mol%, 85 mol%, and 100 mol% and the yield of sorbitol (Sor), xylitol (Xyt), and 2-methoxy-4-methylphenol (MMP) was 82 mol%, 62 mol%, and 100 mol%, respectively. This high activity was attributed to the high specific surface area of NDC and mainly to the heterojunction effects stabilizing and adjusting the homogenously and highly dispersed Ni nanoparticles (A(Ni) = 20m(2) g(-1)) on the surface of NDC. Changing the electron density in the nickel nanoparticles allows the high performance of the catalyst for a long time on stream (40 h) with minimized Ni leaching and without the loss in catalytic performance.
引用
收藏
页码:2755 / 2766
页数:12
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