Monolithic SiC supports with tailored hierarchical porosity for molecularly selective membranes and supported liquid-phase catalysis

Monolithic support materials with the mechanical resistance and thermal conductivity of SiC as well tunable surface chemistry textural properties were developed for their use in catalytic membrane reactors. After heat treatment, extruded monoliths have a monomodal distribution macropores few μm diameter depending on particle size starting material. A macroporous, defect-free, smoother skin was applied onto external wall using solution sub-micrometer particles. These could be coated successfully molecularly selective membranes, thus application reactor processes. Finally, metal oxide nanoparticles infiltrated into to modify texture chemistry, allowing immobilization liquid phase catalysts. The resulting multimodal pore sizes tuned by choice sizes, number wash-coats calcination temperature. Mesopores created between had diameters roughly 40 % those nanoparticles. Small macropores, 10−1000 nm, also created, bigger volume at higher temperatures due particles contraction. validated PDMS membranes continuous gas-phase hydroformylation 1-butene Rh-diphosphite