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.
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Showing 1 to 20 of 24 for “"Air separation"”.
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Controlling flour protein level by use of air separation
Call number: LD2668 .T4 1963 V81
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Controlling flour protein level by use of air separation
Call number: LD2668 .T4 1963 V81
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Evaluating new Oxygen Transfer Materials for Air Separation, Oxy-Fuel Combustion and other Processes
Chemical looping air separation was the pre-dominant commercial process to produce oxygen until it was superseded by the Hampson-Linde cycle in the early $20^{th}$ century. A chemical air separation loop is characterised by the cyclic reduction and oxidation of solid material serving as an oxygen …
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Conceptual development and analysis of multiple integrated hydrogen production plants with Cu-Cl cycle
… hydrogen fueled combined cycle, cryogenic air separation unit, compression system and five-step Cu-Cl cycle. The second system consists of SCWR, hydrogen fueled combined cycle, compression system and five-step Cu-Cl cycle. The third system consists of solar heliostat steam generator, …
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Techno-economic analysis of pressurized oxy-fuel combustion power cycle for CO₂ capture
… energy in the compression step within the air separation unit, a flue gas recirculation system and carbon dioxide purification and compression units. Moreover, a large amount of flue gas latent enthalpy, which has high water concentration, is wasted. Both lower the overall cycle efficiency. …
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Simulation and Comparison of Operational Modes in Simulated Moving Bed Chromatography and Gas-Phase Adsorptive Separation
… optimization of adsorptive and chromatographic separation processes. The first part focus on the simulation and comparison of operational modes in simulated moving bed (SMB) chromatography for separation and purification in bioprocesses. The second part includes the simulation of gas-phase …
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Systems-level design of ion transport membrane oxy-combustion power plants
… with CO 2 capture from power plants. Oxygen separation in an ITM system consists of many distinct physical processes, ranging from complex electrochemical and thermochemical reactions to conventional heat and mass transfer. The dependence of ITM performance on power cycle operating conditions …
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Charakterisierung perowskitischer Hochtemperaturmembranen zur Sauerstoffbereitstellung für fossil gefeuerte Kraftwerksprozesse
… materials are assumed to be applicable as gas separation membranes in the oxyfuel process. Here, the materials should produce the required oxygen more energy-efficient than cryogenic air separation. High-temperature materials which are applicable for this purpose are gastight and exhibit a high …
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Water splitting for hydrogen and syngas production over a novel bi-layer perovskite membrane
… have been investigated in this study. The air separation experiments are conducted over the two materials, respectively. Co-production of hydrogen and syngas from water splitting is investigated using the single layer LSCC membrane and bi-layer membrane. The analysis shows that the bi-layer …
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Study of vapor/gas permeation using thin immobilized liquid membrane
… a highly VOC-enriched permeate and increased separation factor. The same ILM was stable over an extended period (6 months - 2 years) demonstrating the potential utility of such an ILM-based hollow fiber device for VOC-N_2/air separation. A mathematical model was successfully developed to …
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Structured packing in air distillation
… it is advantageous to use structured packing in air separation plant. A model of a low pressure cycle was developed to calculate the power saved when packing is used, and cost models were developed for the columns and cold box. The rate of return was calculated on the extra investment required …
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Design and Development of a Portable Multi-user Medical Grade Oxygen Concentrator
… exchanger efficiency, systemic pressure losses, air separation duration, and peak flow rate of oxygen-enriched air were extensively analysed through experiments and simulations. Results: The concentrator achieved a 21 litres per minute flow rate with over 85% oxygen purity at 100kPa. Cost …
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Design of surface and bulk interactions: A computational approach to sustainable energy
… sectors: industrial and transportation. Separations account for around half of the energy used in the industrial sector, and to reduce the energy used, there are efforts to convert some of the more energy intensive separation strategies like distillation to ones that use lesser energy …
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Evaluation of the Best Equation of State for Enhanced Oil Recovery Use in Ultra-high Pressure Hydraulic Calculation
… gas processing, petroleum refining, and air separation industries. Because the critical thermodynamic properties including enthalpy, entropy, vapor pressure and density are shown to be related to the compressibility factor, this study adopted Aspen HYSYS as the simulation tool to evaluate …
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Dynamic stability, blowoff, and flame characteristics of oxy-fuel combustion
… that burn fossil fuels. In oxy-fuel combustion, air separation is used to burn fuel in oxygen to easily obtain a pure stream of carbon dioxide from the products of combustion. A diluent, typically carbon dioxide, is recycled from the exhaust to mitigate temperature. This substitution of carbon …
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Equation-oriented modeling, simulation, and optimization of integrated and intensified process and energy systems
… scheduling-relevant process or market events. An air separation unit operating in a demand response scenario is used as a representative case study.
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Role of Hydrogen in Industrial Decarbonization: A Case for Ammonia Industry in the United States
… sizing of various units (e.g. electrolyzer, Air Separation Unit, renewables capacity), including deployment of alternative forms of on-site storage (battery energy storage, gaseous 𝐻2 and liquid 𝑁2). The overall mixed-integer linear programming (MILP) model is able to optimize for the minimum …
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A CFD Investigation of the Two Phase Flow Regimes Inside the Bearing Chamber and De-aerator of a Jet Engine
In a jet engine air and oil are mixed during removal from the bearing chamber. Before the oil can be recycled back into the system it must be separated from the air. This is accomplished through use of a de-aerator and breather. The oil air mixture enters the de-aerator first. The de-aerator is a …
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Rotary (redox) reactor-based oxy combustion chemical looping power cycles for CO₂ capture : analysis and optimization
… a redox process to eliminate the need for an air separation unit and enable better energy integration. Conventional CLC employs two separate reactors, with metal oxide particles circulating pneumatically in-between, leading to significant irreversibility associated with reactor temperature …
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A study of configurational alternatives of a gas-to-liquids process based on Fischer-Tropsch technology
… A basic GTL process configuration consists of an Air Separation Unit (ASU), Auto-Thermal Reforming (ATR), syngas cleaning, full conversion Low Temperature Fischer-Tropsch (LTFT) and wax hydrocracking (WHC). These operations are modeled individually and combined to produce a plant model for study …
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