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 9 of 9 for “"Dimethyl ether (DME)"”.
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The adaptation of solenoid actuated injectors for use with dimethyl ether fuel in diesel engines
Dimethyl ether (DME) is an alternative fuel which, of late, has shown tremendous potential in reducing the pollution emissions of automobiles. Simultaneously, electronic actuated fuel injectors, with the use of solenoids, have repeatedly demonstrated superior performance with respect to needle …
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Development and assessment of renewable energy based integrated systems for dimethyl ether production
Dimethyl-ether (DME) is considered to be one of the most promising, renewable alternative fuels. This thesis studies, develops, analyzes and assesses the performance of three dimethyl-ether production integrated systems, where dimethyl-ether is produced from carbon dioxide and renewable hydrogen. …
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Experimental Studies on Solvent Screening and Performance Analysis for Bitumen Recovery Using ES-SAGD
… investigation of four solvent candidates — Dimethyl Ether (DME), Natural Gas Condensate, Urea, and Pyrrolidine —to identify optimal concentrations that maximize recovery, minimize SOR, and reduce energy consumption. A series of ES-SAGD experiments was conducted using a fast-screening …
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Simulation Study of Warm VAPEX Process Using Water-soluble Solvent
… In this study, the feasibility of injecting dimethyl ether (DME) to extract Athabasca bitumen is investigated through numerical simulations. A synthetic reservoir model with fine grids was developed to investigate the displacement mechanisms in a hot DME VAPEX process. Thermal dynamic …
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System model of small-scale gas-to-methanol conversion by engine reformers
… syngas, which is synthesized into methanol and dimethyl ether (DME). Once produced on-site, these liquids are more easily transported than gases. This study assesses the regulatory structures surrounding the upstream methane resource and downstream end product marketability for three scenarios: …
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Dissociative charge transfer of organic molecules induced by collisions with the He+ cation. A joint experimental and theoretical study of relevance for the interstellar medium evolution
… containing organic molecules, ubiquitous in ISM: dimethyl ether (DME, CH3OCH3 ) and methyl formate (MF, HCOOCH3). Since they have a prebiotic relevance, several models were developed to explain how these molecules are formed and destroyed in the ISM. The reactions have been investigated by using …
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Feedstock-To-Tailpipe Analysis of Soybean-Derived Biodiesel and Glycerol Valorization in Kansas
… products such as soap, hydrogen, methanol, dimethyl ether (DME), and ammonia to economize biodiesel production and increase profitability. However, the conversion of glycerol into useful products requires material and energy inputs that carry a significant environmental footprint which must …
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Fast microwave-assisted thermochemical conversion of biomass for biofuel production
… was investigated for converting syngas to dimethyl ether (DME) on various bifunctional catalysts. In Chapter 2, the microwave heating characteristics of various biomass feedstocks and microwave absorbents were examined and compared. Experimental results show that microwave absorbents …
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Critical Material Recovery from Salt-Lakes and Spent Batteries with Membranes and Solvents
… than prevailing market prices. Third, the use of dimethyl ether (DME) in solvent-driven fractional crystallization is examined as an innovative method for extracting critical metals. DME’s properties allow for efficient water extraction from aqueous solutions, causing the crystallization of metals …