Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 32 for “"water adsorption"”.
-
Metal-organic frameworks for water adsorption applications in the automotive filtration industry
… MOF Materialien die sich für die Wasseradsorption eignen hinsichtlich Ihrer Wasseradsorptionseigenschaften untersucht. Das vielversprechendste Material wird ausgewählt und an einem Prüfstand für Lufttrocknerkartuschen untersucht. Für diese Messungen ist eine geeignete Formgebung des …
-
Water adsorption, microstructure, and volume change behavior of clay minerals and soil
Swelling attributable to intracrystalline water adsorption by montmorillonite (MT) and vermiculite (VR) saturated with cations which limit interlayer expansion were calculated as the product of one-half the change in interlayer spacing determined by x-ray diffraction and the difference between …
-
Molecular Structure and Thermodynamics of CO<sub>2</sub> and Water Adsorption on Mica
The adsorption of CO2 and water on clay surfaces plays a key role in applications such as gas storage in saline aquifers and depleted hydrocarbon reservoirs but is not yet fully understood. Here, the adsorption of CO2 and water vapor is studied using Grand Canonical Monte Carlo and molecular …
-
Optimizing adsorbents for heat storage applications : estimation of thermodynamic limits and Monte Carlo simulations of water adsorption in nanopores
… of adsorptive heat storage utilizing reversible water adsorption in microporous solids are discussed. Thermodynamic limits to the energy density achievable in such a system are analyzed through statistical mechanical adsorption models (Langmuir, Bragg-Williams lattice gas). It is shown that an …
-
Mesoporous organosilica materials with amine functions : surface characteristics and chirality
… which is analysized with copper (II) and water adsorption.
-
The post-dehydration processing and the effects on the structural modifications and functionalities of milk protein powders
… on the rehydration abilities, flowability and water adsorption are investigated. MPI agglomerated by FB had the more irregular shapes and porous structures. However, densely packed structures of HS granules caused the higher bulk density and lower porosity. Their shapes were more like spheres …
-
Studies of the surface and bulk reactivity of calcium hydroxide
… Thermo-Gravimetric Analysis, Nitrogen Adsorption, Water Adsorption, Scanning Electron Microscopy and Microprobe Analysis. From this slight differences in the 'fresh' samples were found to be due to various degrees of atmospheric ageing. The main process involved in the ageing process …
-
Investigating the adsorption and transport of water in MFI zeolite pores for water desalination
… is limited by the diffusive transport of water across a non-porous polyamide active layer. Alternatively, fabricating a microporous active layer capable of rejecting salt ions while allowing for water transport would increase the permeability while maintaining high salt rejection. Zeolites …
-
Electronic properties and surface chemistry of vanadium oxide systems: New insights from synchrotron X-ray techniques
… metal oxide substrates in the presence of water and methanol vapour. In a series of isotherm and isobar experiments on VO2 films with a variety of different preparation methods, contamination levels, thicknesses and orientations, molecular water adsorption generally followed a consistent …
-
From Block Copolymers to Crosslinked Networks: Anionic Polymerization Affords Functional Macromolecules for Advanced Technologies
… ranging from high performance energy devices to water purification membranes. Progress in polymer synthesis and engineering now permit well-defined, ion-containing macromolecules with tunable morphologies, mechanical performance, ion conductivity, and 3D structure in order to address these …
-
Water selective MFI zeolite membranes for application in the Fischer Tropsch Synthesis
Selective removal of water from the Fischer-Tropsch Synthesis (FTS) during reaction may allow the use of a cobalt catalyst with crystal size <6 nm hence increasing the catalyst activity. Zeolite membranes are a potential route to in-situ water removal due to their chemical and thermal stability …
-
Selective transport properties in nanostructured materials
… high salt rejection rate while enhancing the water permeability up to two to three orders of magnitude compared to conventional desalination membranes. The COF membrane was also shown to have decent mechanical properties although further modification may be needed to ensure its mechanical …
-
Specific and non-specific interactions on carbon material surfaces.
… not yet been extensively employed in detailed adsorption studies, is a promising alternative to Temperature Programmed Desorption (TPD) and Boehm titration method in the determination of oxygen and other surface groups. Physical effects of the various surface modifications have been studied …
-
Scanning Tunneling Microscopy and Adsorption Studies on Single-Crystal Metal Oxide Surfaces
… positions and point defects on the surface. Water adsorption was studied on the stoichiometric Cr₂O₃ (101̲2) surface, using thermal desorption spectroscopy (TDS). Water was the only desorption product observed during TDS. Adsorption is primarily dissociative following exposure to water at 163 …
-
Multiscale modeling of clay-water systems
… are highly affected by clay content and clay-water interactions. However, existing macro-scale continuum models have no length scale to describe the evolution of the clay microstructure and its role in affecting macroscopic properties. This research proposes a bottom-up multiscale modeling …
-
Electrical study of molybdenum in silicon and fluorinated SiO₂ for interlayer dielectrics
… however, such as lower hardness and increased water adsorption. For this project, eight oxide films with varying fluorine content were studied. The dielectric constant K of each film was calculated with the saturation capacitance from C-V measurements, oxide thickness, and diameter. While all …
-
Functionalization of Metal Oxide Surfaces through Chemical Reactions and Physical Adsorption
… with potential applications in catalysis, adsorption, and materials chemistry. The functionalization of a material’s surface can dramatically change its physical and chemical properties. The research described herein is built on the foundation of traditional techniques used for synthesis, …
-
Functional Block Copolymers via Anionic Polymerization for Electroactive Membranes
… enhanced thermal stability, decreased water adsorption, and well-defined microphase separation. These findings highlight NexarTM sulfonated pentablock copolymers as reactive platforms for novel, bis-imidazolium crosslinked materials. 4-Vinylbenzyl piperidine is a novel styrenic compound …
-
Saturated–Unsaturated behaviour of compacted clays
… by soil composition and compaction, soil-water-electrolyte mechanisms, soil-atmosphere interactions, and field conditions. This research focused on developing a clear understanding of saturated–unsaturated behavior of compacted clays. For this purpose, a representative clayey soil …
-
Sorption mechanisms of dibenzo-p-dioxin/furan from water by smectite clays and theoretical studies on formation pathways of chlorodibenzo-p-dioxins from precursor chlorophenols on smectite clays
… adsorbed dibenzo-p-dioxin /furan from water. Adsorption was promoted by exchangeable cations with low hydration energies, and negative charge in the smectite arising from the tetrahedral siloxane sheets. X-ray diffraction measurements revealed that as dibenzo-p-dioxin (DD) loading …
Page 1 of 2