TY - JOUR
T1 - Deactivation of Sn-Beta during carbohydrate conversion
AU - van der Graaff, William N.P.
AU - Tempelman, Christiaan H.L.
AU - Hendriks, Frank C.
AU - Ruiz-Martinez, Javier
AU - Bals, Sara
AU - Weckhuysen, Bert M.
AU - Pidko, Evgeny A.
AU - Hensen, Emiel J.M.
PY - 2018
Y1 - 2018
N2 - 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 °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.
AB - 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 °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.
KW - Biomass conversion
KW - Catalyst deactivation
KW - Confocal fluorescence microscopy
KW - Flow chemistry
KW - Sn-Beta
KW - Zeolite catalysis
UR - http://www.scopus.com/inward/record.url?scp=85050283179&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2018.07.023
DO - 10.1016/j.apcata.2018.07.023
M3 - Article
AN - SCOPUS:85050283179
SN - 0926-860X
VL - 564
SP - 113
EP - 122
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -