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 124 for “"Water-gas"”.
-
Free-surface turbulence and air-water gas exchange
… investigates the physical mechanisms of air-water gas transfer through direct measurements of turbulence at the air--water interface. To enable this study, a new approach to the particle image velocimetry (PIV) technique is developed in order to quantify free-surface flows. Two aspects of …
-
Supported metal catalysts for water-gas shift conversion
… the past decade due to increases in greenhouse gases and its impact on global climate change. The use of fuel cells as a form of energy generation is extremely promising as it converts chemical potential energy directly to electrical energy, bypassing the Carnot cycle limitations. Various types …
-
Production of water gas by fluidized powder technique,
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1945
-
Free-surface turbulence and air-water gas exchange
Thesis (Ph.D.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), 2000.
-
Solution combustion catalysts for the water-gas shift reaction
… their improved efficiency and lower greenhouse gas-emissions. This study focuses on the development of a compact, efficient design for fuel processing trains. More specifically, reduction in the size of the largest component, the Water Gas-Shift (WGS) reactor, which could be achieved by an …
-
Performance of gold catalysts for low temperature water gas shift
… prepared gold catalysts for low temperature water gas shift (LTS) - and more specifically to investigate the performance of these catalysts at temperatures below those traditionally utilised. As opposed to the research undertaken to-date on gold catalysed water gas shift, the reaction was …
-
A screening study of a new water gas shift catalyst
… software techniques have been developed to study water gas shift catalysts over a temperature range of 150°C to 400°C, a pressure range of 0 atmospheres gauge to 30 atmospheres gauge, and a space velocity range of 600 hr⁻¹ to 60,000 hr⁻¹ . The hardware consists of a 5-foot long 3/16 inch-I.D. …
-
Visualization of Near-Surface Flow Patterns for Air-Water Gas Transfer
… = O(10^6) ) by chemical reaction directly at the water surface. While different chemical systems were tried, best results were achieved using the precipitate AgCl, formed by AgNO 3 in the water body and a controlled influx of HCl gas. Trace amounts of precipitate are made visible by scattering …
-
Catalytic allylation of aldehydes mediated via the water-gas shift reaction
… aldehydes, as mediated through the action of the Water-Gas Shift reaction (WGSR). Through this work, three main objectives were sought. Firstly, an expansion of the scope of the allyl pro-nucleophile as a way to both improve the synthetic utility of the reaction and explore steric and electronic …
-
Performance of gold reference catalysts in the water gas shift reaction
Includes bibliographical references (leaves 76-82).
-
Kinetic models for the Pt/CeO₂ catalysed water-gas shift reaction
… for power generation due to their low greenhouse gas emissions. For fuel cells to be a successful power source, a reliable hydrogen source is required. Ultimately, the goal is for hydrogen to be supplied from renewable energy technology however, this type of technology is currently not mature …
-
Water-gas shift conversion in microchannel reactors using noble metal catalysts
… which converts most of the primary fuel to syngas. In the subsequent water-¬‐gas-¬‐shift stage,most of the carbon monoxide in the syngas is converted to additional hydrogen and carbon dioxide. In a last stage, the small amount of carbon monoxide that remains in the stream is reduced to …
-
Development of a method for quantitative imaging of air-water gas exchange
… investigate the exchange of a soluble alkaline gas (ammonia) from air to water was developed. Key feature of the method is that a linear relationship between the concentrations of the dissolved gas and the alkaline form of the indicator, that is selectively excited to fluorescence in the …
-
Analysis of a duo-selecting membrane reactor for the water-gas shift
The water-gas shift reaction is an exothermic and reversible catalytic process that converts carbon monoxide and water (steam) to hydrogen and carbon dioxide. In regard to energy-related issues, the water-gas shift is part of the process of reforming hydrocarbons to produce hydrogen suitable for …
-
Structure-activity relationships for the water-gas shift reaction over supported metal catalysts
<p>The Water-Gas Shift (WGS) reaction (CO + H<sub>2</sub>O → CO<sub>2</sub> + H<sub>2</sub>) is an important chemical process for industrial hydrogen production. The overall goal of this project is to use kinetic experiments and <em>in situ</em> characterization techniques in tandem, in order to …
-
Experimental and Simulation Study of Relative Permeabilities in Heavy Oil/Water/Gas Systems
… behaviour of a typical Canadian bitumen, water and gas. Series of isothermal core flood experiments were conducted on an unconsolidated core composed of cleaned Athabasca sand matrix and relative permeabilities of the involved phases were determined. Athabasca bitumen was used as the oil …
-
Atomic Scale Characterisation of Pt-Re/CeO2 for the Water Gas Shift Reaction
Inexpensive hydrogen gas is needed to transition to a hydrogen based economy. For this to happen, economically feasible, large scale production of hydrogen gas is required. Currently, electrolysis is unable to meet this demand economically, so steam reforming of hydrocarbons (e.g. methane) is …
-
Preparation and Water-Gas Shift Performance of Zinc Oxide Supported Dispersed Gold Catalysts
The classical deposition-precipitation synthesis from the group of Haruta (Tsubota eta/., 1995) -where the support is added to a pH adjusted solution of HAuCI4 and the system aged at constant pH and temperature - was examined, using ZnO as the support. Gold uptake by the support was confirmed to …
-
Preparation and water-gas shift performance of zinc oxide supported dispersed gold catalysts
… supported dispersed gold materials for use as water-gas shift catalysts were examined, with some of the better formulated materials being tested for catalytic activity, and compared to World Gold Council Au/TiO₂ reference material and a commercial copper-based WGS catalyst (Cu/ZnO/AlO₃ - C 18-7 …
-
The synthesis of methane from blue water gas with a fluidized catalyst bed
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1953.
Page 1 of 7