Deactivation of Sn-Beta during carbohydrate conversion

被引：30
作者：
van der Graaf, William N. P. [1 ]
Tempelman, Christiaan H. L. [1 ]
Hendriks, Frank C. [2 ]
Ruiz-Martinez, Javier [2 ,4 ]
Bals, Sara [3 ]
Weckhuysen, Bert M. [2 ]
Pidko, Evgeny A. [1 ,5 ]
Hensen, Erniel J. M. [1 ]
机构：
[1] Eindhoven Univ Technol, Schuit Inst Catalysis, Inorgan Mat Chem Grp, POB 513, NL-5600 MB Eindhoven, Netherlands
[2] Univ Utrecht, Debye Inst Nanomat Sci, Inorgan Chem & Catalysis Grp, Univ Weg 99, NL-3584 CG Utrecht, Netherlands
[3] Univ Antwerp, Electron Microscopy Mat Sci, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
[4] AkzoNobel Supply Chain Res & Dev, Proc Technol SRG, NL-7418 AJ Deventer, Netherlands
[5] Delft Univ Technol, Chem Engn Dept, Inorgan Syst Engn Grp, Van der Maasweg 9, NL-2629 HZ Delft, Netherlands
来源：
APPLIED CATALYSIS A-GENERAL | 2018年 / 564卷
关键词：
Sn-Beta; Confocal fluorescence microscopy; Catalyst deactivation; Biomass conversion; Flow chemistry; Zeolite catalysis; LEWIS-ACID ZEOLITES; CATALYST DEACTIVATION; METHYL LACTATE; LACTIC-ACID; SUGARS; BIOMASS; SPECTROSCOPY; STABILITY; METHANOL; ZSM-5;
D O I：
10.1016/j.apcata.2018.07.023
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：
The deactivation of Sn-Beta zeolite catalyst during retro-aldolization and isomerization of glucose is investigated. Confocal fluorescence microscopy reveals that retro-aldolization of glucose in CH3OH at 160 degrees C is accompanied with the build-up of insoluble oligomeric deposits in the micropores, resulting in a rapid catalyst deactivation. These deposits accumulate predominantly in the outer regions of the zeolite crystals, which points to mass transport limitations. Glucose isomerization in water is not only accompanied by the formation of insoluble deposits in the micropores, but also by the structural degradation of the zeolite due to desilication and destannation. Enhanced and sustained catalytic performance can be achieved by using ethanol/water mixtures as the reaction solvent instead of water.
引用
收藏
页码：113 / 122
页数：10
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