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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 64 for “"Gas Adsorption"”.
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Development of porous metal-organic frameworks for gas adsorption applications
… materials that have potential applications in gas storage, separations, catalysis, sensors, non-linear optics, displays and electroluminescent devices. They are synthesized in a "building-block" approach by self-assembly of metal or metal-oxide vertices interconnected by rigid linker molecules. …
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Computational Study of Metal-Organic Frameworks for Gas Adsorption Applications
… are among the most promising materials for gas adsorption applications because of their ultrahigh surface areas (up to 8,000 m² g¯¹) and high porosity. Their self-assembly nature of metal ions or clusters and organic ligands allow for high tuneability and a large variety of MOF structures. …
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STUDY OF GAS ADSORPTION ON AS-PRODUCED AND MODIFIED CARBON NANOTUBES
… Illinois University Carbondale. TITLE: STUDY OF GAS ADSORPTION ON AS-PRODUCED AND MODIFIED CARBON NANOTUBES MAJOR PROFESSOR: Dr. Aldo D. Migone Volumetric adsorption isotherm measurements were used to study the adsorption characteristics of Ethane (C2H6) and Butane (C4H10) on as-produced …
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Experimental apparatus for the study of gas adsorption on spent shale
Includes bibliographical references.
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Development of Densified Metal-Organic Framework Monoliths for Gas Adsorption and Separation Applications
… as promising functional materials with superior gas adsorption and separation performance due to their highly tuneable nature, which enables control over structures and physicochemical properties such as BET area, pore volume, and surface chemistry. However, despite their potential, the practical …
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Selective gas adsorption of gas-water mixtures in nanoscale systems and its application to gas separation
… and transport dynamics of individual water and gases in nano-devices has been investigated extensively since anomalous molecular structures near the nanoscale surface can affect the slip behavior of transport in channels and the hydrophobic interaction of apolar objects in solutions. However, …
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Characterization Of Nanoporous Materials Using Gas Adsorption Isotherms: Evaluating Their Potential For Gas Storage And Separation Applications
… be used in practical applications involving adsorption, it is important to investigate the basic properties (i.e. isosteric heat, specific surface area, binding energy, pore size, pore volume, etc.) of each material. With this aim in mind we have looked at three different types of materials: …
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Binary gas adsorption on molecular sieves. Experimental data for the adsorption of oxygen, nitrogen and oxygen-nitrogen mixtures on five molecular sieve adsorbents at various temperatures and pressures and a comparison with theoretical models.
A study of adsorption equilibria of oxygen, nitrogen and oxygen-nitrogen mixtures on types 4A, 5A, 13X and Na-Mordenite molecular sieve pellets has been made. Pure component isotherms, using a volumetric apparatus, have been measured for each gas on each adsorbent at pressures up to 9 bar and for …
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MULTIVARIATE FLEXIBLE METAL ORGANIC FRAMEWORKS: THE ROLE OF FUNCTIONALIZED LINKERS, HETEROGENEITY AND DEFECTS IN ADSORPTION PROCESSES
… making them useful for applications in selective gas adsorption/separation. Furthermore, a number of MOFs have the ability to respond to specific stimuli such as host-guest interactions, temperature or pressure change, light, etc. To date, most of the applications of these flexible MOFs is related …
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Selective transport properties in nanostructured materials
… is the metal-organic frameworks (MOFs). Here the gas adsorption properties of MOF in defective and strained structures have been explored. We first look into water adsorption properties of MOF-801 and explore the role of defects. The defect sites contribute to preferential adsorptive behavior, …
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THE MICROSTRUCTURES OF ESTUARINE PARTICLES
… Creek was carried out using a nitrogen adsorption technique. The surface areas and porosities of the particles were determined using BET theory and capillary models applied to the gas adsorption isotherms. The surface areas of the suspended particles collected on axial transects of the …
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Engineering flexible metal-organic frameworks from methylene-hinged ligands
… and consequently interesting guest exchange and gas adsorption properties. The first methylene-hinged ligand described, di-2-pyrazinylmethane, exhibited an exceptionally rich coordination chemistry with silver(I). Appropriate conditions led to the crystallisation of three isostructural 3-D …
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Measurements, Modeling and Analysis of High Pressure Gas Sorption in Shale and Coal for Unconventional Gas Recovery and Carbon Sequestration
In order to exploit unconventional gas and estimate carbon dioxide storage potential in shale formations and coal seams, two key questions need to be initially answered: 1) What is the total gas-in-place (GIP) in the subsurface reservoirs? 2) What is the exact ratio between bulk gas content and …
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Characterizaton of Triethoxyfluorosilane and Tetraethoxysilane Based Aerogels
… determination by impedance and surface area by gas adsorption. Si-F bonds were determined to be present in both acid- and base-catalyzed TEFS as well as HF-catalyzed TEOS. Fluorine promotes a fractal network microstructure as opposed to a particle-like microstructure. Surface area and dielectric …
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Fracture optimization based on gradient descent methodology
… comprehensive reservoir simulator, MSFLOW, with gas adsorption/desorption and Klinkenberg effect coupled, is adopted to obtain the production rate and NPV at each searching step. Armijo rule is used to determine the searching step size. With the developed workflow, we have investigated the …
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The manufacture of monosodium phosphate from wet process acid by amine extraction
… extraction followed a pattern similar to that of gas adsorption, and a modified BET equation gave a fair but not highly accurate fit of the distribution data.
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Investigating the redispersibility of calcium carbonate
… zeta potentials, scanning electron microscopy, gas adsorption for surface area analysis, shear rate controlled rheology tests and compressive load tests to obtain agglomerate strengths. The particle size distributions and rheological properties are strongly correlated as an increased number of …
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Preparation and Reactivity of Niobium-Containing Hydrotreating Catalysts
… microscopy (SEM), elemental analysis (CHNS), and gas adsorption techniques. The solid state transformation occurred directly from Nb₂O₅ to NbN<sub>x</sub>O<sub>y</sub> without any suboxide intermediates. The bimetallic supported oxycarbide materials were also characterized by X-ray diffraction …
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Synthesis and Characterization of pure-phase Zr-MOFs Based on meso-Tetra(4-carboxyphenyl)porphine
… perform a wide variety of functions ranging from gas adsorption, catalysis and light harvesting. The versatile nature of these frameworks can be exploited by incorporating them in multi-functional assemblies that mimic biological and enzymatic systems. Nano-thin film fabrication of porphyrin-based …
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Investigating CO2 Adsorption Behavior in Metal-Organic Frameworks by Solid-state NMR
… for CO2 capture due to their large CO2 adsorption capacity. In this study, the adsorption behavior of CO2 molecules in [Zn2(TRZ)2(NH2-BDC)] (TRZ=1,2,4-triazolate, NH2-BDC=2-amino-1,4-benzenedicarboxylic acid), and CALF-20 are studied. Moreover, water is ubiquitous in the atmosphere and …
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