TY - JOUR
T1 - Monolithic SiC supports with tailored hierarchical porosity for molecularly selective membranes and supported liquid-phase catalysis
AU - Portela, Raquel
AU - Marinkovic, Jakob Maximilian
AU - Logemann, Morten
AU - Schörner, Markus
AU - Zahrtman, Nanette
AU - Eray, Esra
AU - Haumann, Marco
AU - García-Suárez, Eduardo J.
AU - Wessling, Matthias
AU - Ávila, Pedro
AU - Riisager, Anders
AU - Fehrmann, Rasmus
N1 - Funding Information:
The authors gratefully acknowledge financial support from the European Commissionwithin the Horizon2020-SPIRE project ROMEO (Grant Agreement Number 680395). Furthermore, the authors would like to thank Dr. Andreas B?smann and M. Sc. Patrick Wolf (Universit?t Erlangen-N?rnberg) for the XRF measurements, as well as Markus Wist (RWTH Aachen University) for his work in the membrane fabrication.
Funding Information:
The authors gratefully acknowledge financial support from the European Commission within the Horizon2020-SPIRE project ROMEO (Grant Agreement Number 680395) . Furthermore, the authors would like to thank Dr. Andreas Bösmann and M. Sc. Patrick Wolf (Universität Erlangen-Nürnberg) for the XRF measurements, as well as Markus Wist (RWTH Aachen University) for his work in the membrane fabrication.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020
Y1 - 2020
N2 - Monolithic support materials with the mechanical resistance and thermal conductivity of SiC as well as tunable surface chemistry and textural properties were developed for their use in catalytic membrane reactors. After heat treatment, the extruded SiC monoliths have a monomodal distribution of macropores of a few μm in diameter depending on the particle size of the starting material. A macroporous, defect-free, smoother skin was applied onto the external wall using a solution of sub-micrometer SiC particles. These monoliths with skin could be coated successfully with molecularly selective membranes, and thus have application in membrane reactor processes. Finally, metal oxide nanoparticles were infiltrated into the macropores to modify the surface texture and chemistry, allowing the immobilization of liquid phase catalysts. The resulting multimodal distribution of pore sizes could be tuned by the choice of SiC and oxide particle sizes, number of wash-coats and calcination temperature. Mesopores created between nanoparticles had diameters of roughly 40 % of those of the nanoparticles. Small macropores, between 10−1000 nm, were also created, with bigger size and volume at higher calcination temperatures due to the metal oxide particles contraction. The developed materials were validated as support for PDMS membranes and for continuous gas-phase hydroformylation of 1-butene using Rh-diphosphite catalysts.
AB - Monolithic support materials with the mechanical resistance and thermal conductivity of SiC as well as tunable surface chemistry and textural properties were developed for their use in catalytic membrane reactors. After heat treatment, the extruded SiC monoliths have a monomodal distribution of macropores of a few μm in diameter depending on the particle size of the starting material. A macroporous, defect-free, smoother skin was applied onto the external wall using a solution of sub-micrometer SiC particles. These monoliths with skin could be coated successfully with molecularly selective membranes, and thus have application in membrane reactor processes. Finally, metal oxide nanoparticles were infiltrated into the macropores to modify the surface texture and chemistry, allowing the immobilization of liquid phase catalysts. The resulting multimodal distribution of pore sizes could be tuned by the choice of SiC and oxide particle sizes, number of wash-coats and calcination temperature. Mesopores created between nanoparticles had diameters of roughly 40 % of those of the nanoparticles. Small macropores, between 10−1000 nm, were also created, with bigger size and volume at higher calcination temperatures due to the metal oxide particles contraction. The developed materials were validated as support for PDMS membranes and for continuous gas-phase hydroformylation of 1-butene using Rh-diphosphite catalysts.
KW - Catalysis
KW - Hydroformylation
KW - Molecularly selective membrane
KW - Monolith
KW - Porosity
KW - Silicon carbide
UR - http://www.scopus.com/inward/record.url?scp=85087220815&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2020.06.045
DO - 10.1016/j.cattod.2020.06.045
M3 - Journal article
AN - SCOPUS:85087220815
SN - 0920-5861
JO - Catalysis Today
JF - Catalysis Today
ER -