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 87 for “"gas transport"”.
-
Gas transport properties of reverse selective nanocomposite materials
… in characteristic dimensions. Nanocomposite transport properties were studied, where permeability and solubility coefficients were determined for light gases with increasing pressure, and diffusion coefficients were calculated from the solution-diffusion model. The permeability of light gases …
-
Gas Transport In Two-Layer Proton Exchange Membranes
<p>A gas-phase sulfur dioxide (SO2) depolarized electrolyzer has been investigated for the large scale production of hydrogen. One issue that negatively affects electrolyzer operation is the diffusion of SO2 from the anode to cathode. A viable method to reduce crossover is to use a thin, …
-
Multi-scale Real Gas Transport in Shale Matrix
As one of the clean energy resources, shale gas significantly reduces greenhouse gas emissions. The description of the gas transport behavior in shale rocks is one of the numerous challenges for further studies on economically developing shale gas reservoirs. In this work, real gas transport in the …
-
Plasma/neutral gas transport in divertors and limiters
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1983.
-
Mixed Gas Transport Study Through Polymeric Membranes: A Novel Technique
The gas transport and separation properties of polymers have been successfully exploited in commercial ventures. Industrial applications employing membrane processes range from production of pure gases to barrier coatings for protection against environmental elements. Membrane separations are …
-
Efficient simulation of molecular gas transport for micro- and nanoscale applications
… an efficient method for simulating the Boltzmann transport equation in regimes typically encountered in nanotechnology applications. These transport regimes are characterized by non-vanishing Knudsen numbers, preventing simple analyses based on the Navier-Stokes equations; and also by small …
-
Poroelastic Effect on Gas Transport and Storage in Organic Rich Shale Reservoir
… properties of the shale matrix on storage and transportation mechanism in multi-scale organic rich shale gas reservoirs. Over last decades shale gas research widen significantly, however, the behavior and properties of shale formation still need more investigation. Most of our knowledge …
-
Elucidating the Role of Fluorine on Gas Transport Through Fluorinated Polymer Membranes
… work is to elucidate the role of fluorine on gas permeability, diffusion, and sorption through the systematic synthesis and characterization of hydrocarbon, partially fluorinated, and fully fluorinated polymer structures, with a particular focus on the development of structure–property …
-
Mixed-gas Transport in Microporous Polymer Derivatives for Energy-Efficient Gas Separations
Over the past forty years, membrane-based gas separations have emerged as a promising alternative to energy-intensive separation processes such as amine absorption and cryogenic distillation. However, a trade-off between permeability and selectivity as well as issues of decreased performance at …
-
Gas Transport in Proton Exchange Membranes for use in Fuel Cell Applications
The objectives of this research were to study the gas transport properties of proton exchange membranes (PEM), namely disulfonated poly(arylene ether sulfone) (BPSH-35), post sulfonated diels-alder poly(phenylene) (SDAPP), and poly(perfluoro sulfonic acid) (Nafion). The O2 gas permeabilities were …
-
New mathematical models of inert gas transport through biological tissue in hyperbaric environments
… a fundamental mathematical analysis of inert gas transport through biological tissue at a raised ambient partial pressure. Three basic time-scales of transport in tissue are defined and their relationship examined and compared with existing models, which e.re shown to be usually inadequate in …
-
Synthesis, Characterization, Membrane Fabrication and Gas Transport Behavior of Liquid Crystal Polymer Materials
… selectivity, and can thus be used to tune the transport and separation of different species. The current work has focused on polymer dispersed liquid crystal (PDLC), linear butadiene diol based side chain liquid crystalline polymer (LCP), and linear and crosslinked acrylate based LCP membranes. …
-
Fission Gas Transport and Its Interaction With Irradiation Induced Defects in Lanthanum Doped Ceria
… distributions of dislocation loops, voids and gas bubble structures created by irradiation. More importantly, this systematic experimental work has provided key insights into the understanding of the mechanisms of defect evolution in the materials investigated. A model including both defect …
-
Fission gas transport and its interactions with irradiation-induced defects in lanthanum doped ceria
… distributions of dislocation loops, voids and gas bubble structures created by irradiation. More importantly, this systematic experimental work has provided key insights into the understanding of the mechanisms of defect evolution in the materials investigated. A model including both defect …
-
Gas transport properties in polycarbonate - Influence of the cooling rate, physical aging, and orientation
… was to understand the molecular mechanism of gas transport through amorphous glassy polymers. Especially, emphasis was placed on determining whether or not gas transport in amorphous glassy polymers is directly correlated with the free volume content. Free volume arguments are indeed commonly …
-
Response rainbow trout (Salmon gairdneri) blood gas transport system to temperature, oxygen availability and photoperiod
Hematological status in rainbow trout, Salmo gairdneri, was examined in relation to eight combinations of three environmental fa ctors; temperature (5°, 20°C), oxygen availability «35%, >70% saturation) and photoperiod (16L:8D, 8L:16D) and evaluated by 3-factor analysis of variance. Hemog l obin …
-
Experimental analysis of natural gas transport: using nanoporous ceramic cores as mimetic model for low permeability reservoirs.
… cores as mimetic models for studying natural gas transport in low permeability reservoirs. Low permeability reservoirs, such as tight sands, coalbed methane and shale gas formations, present significant challenges for natural gas extraction due to their complex pore structures and limited flow …
-
Polyimide-Organosilicate Hybrid Materials: Part I: Effects of Annealing on Gas Transport Properties; Part II: Effects of CO2 Plasticization
… polyimide-organosilicate hybrid membranes on gas transport. In addition, the effects of carbon dioxide pressure on the gas transport of unannealed polyimide-organosilicate hybrid membranes were evaluated. The membranes in both studies consisted of sol-gel derived organosilicate domains …
-
Preparation, characterization and carrier gas transport characteristics of inorganic and organic membranes for application in lactic acid esterification with ethanol.
… resin catalysts. The product was analysed using gas chromatograph coupled with mass spectrometry detector (GC-MS). The analytical methods used for the characterisation of the cation-exchange resins and membrane include Fourier transform infrared coupled with attenuated total reflectance …
Page 1 of 5