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Showing 1 to 11 of 11 for “"capillary condensation"”.
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Using oscillations to detect capillary condensation in MCM-41
… method to measure the net gas-in-place with capillary condensation. This method was tested using a synthesized MCM-41 sample and propane gas. The principle of the method is to calculate the effective mass from the frequency of the oscillation of a spring-mass system. A weight holder …
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X-ray Scattering Study Of Capillary Condensation In Mesoporous Silica
The capillary condensation deforms a nanoporous material due to the capillary force generated by the fluid inside the pores. In-situ small and wide angle x-ray scattering(S/WAXS) were used to study the deformation with respect to relative vapor pressure of the fluid. Periodic mesoporous silica such …
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Effects and applications of capillary condensation in ultrathin nanoparticle assemblies
… Here we describe the advantageous use of capillary condensation, a well-known natural phenomenon in nanoporous materials, as a more universal functionalization strategy. Capillary condensation of solvent molecules into nanoporous LbL films was shown to bridge neighboring nanoparticles via …
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Phase transition induced deformation in porous media
Capillary condensation-evaporation and freeze-thaw processes are the most familiar examples of first-order phase transitions in equilibrium thermodynamics. Porous, amorphous materials are widely used in everyday life, yet their complex spatial structures lead to unresolved questions for statistical …
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ΜΕΛΕΤΗ ΤΗΣ ΑΠΟΔΡΑΣΤΙΚΟΠΟΙΗΣΗΣ ΚΑΤΑΛΥΤΩΝ ΚΑΤΑ ΤΗΝ ΥΔΡΟΓΟΝΟΑΠΟΘΕΙΩΣΗ ΥΠΟΛΕΙΜΜΑΤΩΝΑΠΟΣΤΑΞΗΣ ΑΡΓΟΥ ΠΕΤΡΕΛΑΙΟΥ ΘΑΣΟΥ
… TO OPERATING TIME. THE NITROGEN ADSORPTION-CAPILLARY CONDENSATION AND THE MERCURY DOROSIMETRY TECHNIQUES WERE APPLIED TO DETERMINE PORE VOLUME DISTRIBUTIONS AND SPECIFIC SURFACE AREAS OFCATALYST SAMPLES BEFORE AND AFTER USE AS WELL AS AFTER CATALYST REGENERATION. C/H RATIOS AND N2 CONTENT OF …
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Investigation of glucose hydrate formation and loss: Parameters, mechanisms, and physical stability
… of crystalline materials stored below their RH0. Capillary condensation between particles leads to the formation of liquid bridges, which over time solidify due to dissolution and mass transfer across the liquid bridge without a change in relative humidity or temperature. The critical relative …
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Physical and radiative properties of coated nanoparticle aggregates
… growth is incorporated as a proxy for condensational processes. Three growth pathways are explored: capillary condensation in low-saturation environments and extended uniform and non-uniform coatings at higher saturations. Capillary condensation leads to aggregate pore filling via …
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Topographic and Surface Chemical Aspects of the Adhesion of Structural Epoxy Resins to Phosphorus Oxo Acid Treated Aluminum Adherends
… liquid water. Liquid water can only form by capillary condensation in interfacial gaps from molecularly diffusing water. A hydrolytically stable oxide will prevent bond failure due to mechanical weakening of the substrate surface, while a high density of hydrolytically stable surface bonding …
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Removing the Quantum Barrier to Sustainable LH2 Fuel in Aviation: A Mechanistic, Process, and Environmental Life Cycle Assessment of the Ortho-Para Conversion in Liquefaction
… by a modified Langmuir-Hinshelwood model where capillary condensation within the catalyst pores creates a dense reactive phase, dramatically accelerating the conversion rate and providing a new mechanistic basis for designing advanced cryogenic reactors. To assess the broader system …
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Advanced quartz crystal microbalance techniques applied to calixarene sensing membranes.
… properties are believed to be caused by capillary condensation of vapours at values below saturated vapour pressure inside the nano-porous calix[4]resorcinarene film matrix.The work is extended by the use of the sensor array technique. In the first instance frequency only measurements are …
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NMR Studies of Emulsions in Porous Media and Applications to Fischer-Tropsch Synthesis
… \textit{P}/\textit{P}\textsubscript{0}~\geq$~0.8, capillary condensation of water inside the catalyst pores was reported. This resulted in the formation of a water-rich, surface-wetting layer, located in between the pore surface and the wax layer. The wax species were displaced and became isolated …