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- W2011941567 abstract "MFI zeolite membranes were synthesized by the templated in-situ synthesis method on α-alumina porous supports under various conditions and subsequently modified by catalytic cracking deposition (CCD) of methyldiethoxysilane (MDES) to improve high temperature H2/CO2 separation performance. The quality of the zeolite membranes was examined by helium permeation (before template removal) and room temperature H2/CO2 separation (after template removal). For membranes prepared through single hydrothermal synthesis, the helium permeance decreases and the room temperature H2/CO2 separation factor increases with increasing synthesis time (or membrane thickness). Helium flows through the defects of the as-prepared membranes before template removal decreases as membrane thickness increases, but the thicker membranes contain more defects formed during the template removal step. Twice-hydrothermal treatment with calcination in between is effective to improve the quality of MFI zeolite membranes. However, a minimal synthesis time for each hydrothermal cycle is needed to eliminate the intercrystalline defects. Catalytic cracking deposition of MDES improves the high temperature H2/CO2 separation performance of the MFI zeolite membranes and the extent of the improvements is directly correlated with the membrane synthesis conditions. After CCD modification, the H2/CO2 separation factor of the membrane synthesized twice with 4 h for each hydrothermal cycle was improved from 4.2 to 8.6 with around 40% reduction in H2 permeance." @default.
- W2011941567 created "2016-06-24" @default.
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- W2011941567 date "2011-07-01" @default.
- W2011941567 modified "2023-09-27" @default.
- W2011941567 title "Effects of synthesis conditions on MFI zeolite membrane quality and catalytic cracking deposition modification results" @default.
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- W2011941567 doi "https://doi.org/10.1016/j.micromeso.2010.12.037" @default.
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