High-Pressure Technology

Schlücker, Eberhard

doi:10.1002/14356007.b04_587.pub2

Cited by 5 publications

(5 citation statements)

References 64 publications

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“…Changes in the association constant with temperature were used to calculate the Gibbs free energy for this process according to Equation (5). The enthalpy and entropy of the association are defined using the relationships described by Equations ( 6) and (7).…”

Section: Table 1 Values Of Limiting Molar Conductivitymentioning

confidence: 99%

“…They are used as absorbents in gas separation and as working fluids (lubricants, heat transfer fluids, hydraulic fluids) [4]. A notable example is the ethylsulfate 1-ethyl-3-methylimidazolium, which has been used as a hydraulic fluid [5] and is known under the commercial name ECOENGTM 212. Furthermore, ionic liquids are used in extraction processes [6,7], biofuel production and biobutanol extraction [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Electrical Conductivity of Ionic Liquids 1-Hexyl-3-Methylimidazolium Chloride (HMIM) and 1-Methyl-3-Octylimidazolium Chloride (OMIM) in Mixtures with Selected Alkoxy Alcohols over a Wide Temperature Range

Kinart

2023

Molecules

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Ionic liquids have been the subject of intense research because of their unique electrochemical properties and potential applications in various fields. In this article, we analyze the electrical conductivity of two selected ionic liquids, 1-hexyl-3-methylimidazolium chloride (HMIM) and 1-eethyl-3-octylimidazolium chloride (OMIM), in various alkoxy alcohols such as 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol and 2-butoxyethanol. Our research focuses on attempting to analyze the impact of the molecular structure of both the ionic liquids and alkoxy alcohols on their electrical conductivity properties. The results of our study can be highly beneficial in the design of advanced electrochemical materials and their various applications.

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Section: Table 1 Values Of Limiting Molar Conductivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrical Conductivity of Ionic Liquids 1-Hexyl-3-Methylimidazolium Chloride (HMIM) and 1-Methyl-3-Octylimidazolium Chloride (OMIM) in Mixtures with Selected Alkoxy Alcohols over a Wide Temperature Range

Kinart

2023

Molecules

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“…Concerning the practicability of our approach, it is encouraging to note that both alkenolysis reactions [45] and olefin isomerizations [46, 47] are both viable on an industrial scale (though as seperated processes and with substrates different than the feedstocks used here), as are processes in supercritical media at elevated pressures [48, 49] . Further improvements of catalyst performance are desirable to improve competitiveness with highly optimized traditional petrochemical procedures.…”

Section: Discussionmentioning

confidence: 94%

Catalytic Biorefining of Natural Oils to Basic Olefinic Building Blocks of Proven Chemical Valorization Schemes

2023

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Catalytic transformation of renewable plant oils including microalgae and waste oil into industrially relevant α-olefins in the C 3 to C 10 regime is demonstrated. The biorefinery concept is comprised of a catalytic sequence of ethenolysis, double bond isomerization, and a subsequent ethenolysis, thereby cutting and rearranging the fatty acid chains into valuable chemical building blocks. A benign extraction and reaction solvent, supercritical carbon dioxide (scCO 2 ), is utilized.

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“…Therefore, it is feasible to use lower autoclave wall thicknesses if a reactor is used only for ammonoacidic growth and specifically designed to minimize wall thickness. The permissible internal pressure p can be estimated from the yield strength R p 0.2 and the ratio of the outer and inner diameter u as follows [ 47 ]:

…”

Section: Resultsmentioning

confidence: 99%

High-Energy Computed Tomography as a Prospective Tool for In Situ Monitoring of Mass Transfer Processes inside High-Pressure Reactors—A Case Study on Ammonothermal Bulk Crystal Growth of Nitrides including GaN

et al. 2022

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For the fundamental understanding and the technological development of the ammonothermal method for the synthesis and crystal growth of nitrides, an in situ monitoring technique for tracking mass transport of the nitride throughout the entire autoclave volume is desirable. The feasibility of using high-energy computed tomography for this purpose was therefore evaluated using ex situ measurements. Acceleration voltages of 600 kV were estimated to yield suitable transparency in a lab-scale ammonothermal setup for GaN crystal growth designed for up to 300 MPa operating pressure. The total scan duration was estimated to be in the order of 20 to 40 min, which was sufficient given the comparatively slow crystal growth speed in ammonothermal growth. Even shorter scan durations or, alternatively, lower acceleration voltages for improved contrast or reduced X-ray shielding requirements, were estimated to be feasible in the case of ammonoacidic growth, as the lower pressure requirements for this process variant allow for thinned autoclave walls in an adapted setup designed for improved X-ray transparency. Promising nickel-base and cobalt-base alloys for applications in ammonothermal reactors with reduced X-ray absorption in relation to the maximum operating pressure were identified. The applicability for the validation of numerical simulations of the growth process of GaN, in addition to the applicability of the technique to further nitride materials, as well as larger reactors and bulk crystals, were evaluated.

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High-Pressure Technology

Cited by 5 publications

References 64 publications

Electrical Conductivity of Ionic Liquids 1-Hexyl-3-Methylimidazolium Chloride (HMIM) and 1-Methyl-3-Octylimidazolium Chloride (OMIM) in Mixtures with Selected Alkoxy Alcohols over a Wide Temperature Range

Electrical Conductivity of Ionic Liquids 1-Hexyl-3-Methylimidazolium Chloride (HMIM) and 1-Methyl-3-Octylimidazolium Chloride (OMIM) in Mixtures with Selected Alkoxy Alcohols over a Wide Temperature Range

Catalytic Biorefining of Natural Oils to Basic Olefinic Building Blocks of Proven Chemical Valorization Schemes

High-Energy Computed Tomography as a Prospective Tool for In Situ Monitoring of Mass Transfer Processes inside High-Pressure Reactors—A Case Study on Ammonothermal Bulk Crystal Growth of Nitrides including GaN

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