Selective aqueous phase hydrogenation of xylose to xylitol over SiO2-supported Ni and Ni-Fe catalysts: Benefits of promotion by Fe

被引：26

作者：

Sadier, Achraf ^{[1
]}

Shi, Dichao ^{[1
]}

Mamede, Anne-Sophie ^{[1
]}

Paul, Sebastien ^{[1
]}

Marceau, Eric ^{[1
]}

Wojcieszak, Robert ^{[1
]}

机构：

[1] Univ Lille, Univ Artois, UMR Unite Catalyse & Chim Solide 8181, Cent Lille,CNRS, F-59000 Lille, France

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2021年 / 298卷

关键词：

Ni-Fe bimetallic particles; Biomass valorization; Hydrogenation; Kinetics; LEIS; RANEY-TYPE NI; GLUCOSE HYDROGENATION; SUGAR ALCOHOLS; LIGNOCELLULOSIC BIOMASS; SURFACE-COMPOSITION; RUTHENIUM; CONVERSION; NICKEL; DEACTIVATION; CHEMICALS;

D O I：

10.1016/j.apcatb.2021.120564

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A monometallic Ni and a bimetallic Ni-Fe catalyst were used in the aqueous phase hydrogenation of xylose in batch conditions (T = 50-150 degrees C, P-H2 = 10-30 bar, xylose mass fraction in water = 3.7-11.0 wt.%) to evidence the benefits of promoting Ni by Fe. The activity of the catalysts increased with temperature, but a temperature of 80 degrees C allowed minimizing nickel leaching at full conversion. The presence of reduced Fe at the surface of the bimetallic nanoparticles increased both the first-order apparent rate constant and the adsorption constant of xylose. The catalytic activity of Ni/SiO2 strongly declined and no deactivation was found for the Ni-Fe catalyst. A restructuring of the bimetallic nanoparticles took place, as the size of the metal particles and the Fe proportion in the surface layers increased, suggesting a flattening and coalescing of the particles over the silica surface.

引用

页数：8

共 45 条

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