TY - GEN
T1 - Design and fabrication of infiltratable multiscale catalytic cellular structures into microchannel
AU - Chen, Haibiao
AU - Lee, Woo
PY - 2005
Y1 - 2005
N2 - Multiscale cellular structures containing periodically interconnected open cells of 10 to 20µm were synthesized in the 100 µm × 500 µm microchannel of a silicon-based microcreactor by developing a fabrication procedure based on microsphere templating, sol-gel, and nanoparticle infiltration. Polystyrene microspheres were selectively infiltrated and self-assembled into the microchannel from suspension. The polystyrene microspheres were partially sintered to create the inverse template of a desired cellular structure. SiO2 precursor sol or nanoparticle (20 nm) suspension was subsequently infiltrated into the interstices of the template. Upon drying and sintering, the solid silica skeleton was formed and the microspheres were removed. The resulting cellular structure was infiltrated with a 1 mm catalyst layer of Pd/SiO2 by sol-gel. The thin-film layer contained pores in the range of 1.2-1.4 nm and Pd particles of 3 nm. Cell size, cell interconnectivity and skeleton density were mainly considered for overall procedural refinement, as these structural variables are expected to be important in addressing the mechanical stability, pressure drop, and mass transfer resistance issues associated with designing this type of catalytic cellular structures for microreactor applications.
AB - Multiscale cellular structures containing periodically interconnected open cells of 10 to 20µm were synthesized in the 100 µm × 500 µm microchannel of a silicon-based microcreactor by developing a fabrication procedure based on microsphere templating, sol-gel, and nanoparticle infiltration. Polystyrene microspheres were selectively infiltrated and self-assembled into the microchannel from suspension. The polystyrene microspheres were partially sintered to create the inverse template of a desired cellular structure. SiO2 precursor sol or nanoparticle (20 nm) suspension was subsequently infiltrated into the interstices of the template. Upon drying and sintering, the solid silica skeleton was formed and the microspheres were removed. The resulting cellular structure was infiltrated with a 1 mm catalyst layer of Pd/SiO2 by sol-gel. The thin-film layer contained pores in the range of 1.2-1.4 nm and Pd particles of 3 nm. Cell size, cell interconnectivity and skeleton density were mainly considered for overall procedural refinement, as these structural variables are expected to be important in addressing the mechanical stability, pressure drop, and mass transfer resistance issues associated with designing this type of catalytic cellular structures for microreactor applications.
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M3 - Conference contribution
AN - SCOPUS:22444437707
SN - 0816909849
T3 - 2005 AIChE Spring National Meeting, Conference Proceedings
SP - 2997
BT - 2005 AIChE Spring National Meeting, Conference Proceedings
T2 - 2005 AIChE Spring National Meeting
Y2 - 10 April 2005 through 14 April 2005
ER -