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Showing 1 to 11 of 11 for “"Knudsen Effusion"”.
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Physical and Chemical Interactions in Liquid Metal Mixtures
… using a weight loss technique based on the Knudsen effusion method. Positive deviations from ideality occur for the activities in the copper-lead system, while negative deviations are observed for the titanium-tin and titanium-copper mixtures.
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Measurements of fission product sorption on graphite
… were measured in the range of 1000-1400K. Knudsen Effusion Mass Spectrometry (KEMS) was used for vapor pressure measurements, and Instrumental Neutron Activation Analysis (INAA) was used for measurements of silver adsorbed on graphite. From the data, adsorption isotherms and the enthalpies …
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Bestimmung chemischer Aktivitäten in Werkstoffen von Hochtemperaturbrennstoffzellen (SOFC) durch massenspektrometrische Verdampfungsuntersuchungen
… process of SOFC. Vaporization studies by Knudsen effusion mass spectrometry and phase diagram studies were carried out for the determination of the missing data. Phase diagrams of the systems La2O3-Ga2O3-MgO, La2O3-SrO-Ga2O3-MgO, La2O3-SrO-Ga2O3 were experimentally determined. …
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Flux profile modelling using numerical methods
… in closed cells with orifice was identified as Knudsen effusion and for computer simulation of these types of cells Model II was developed. The cosine law of effusion was modified to account for the focusing effect exhibited by the industrial cells. The modified law involves parameter N and as N …
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Freisetzung anorganischer Spezies bei der thermochemischen Umwandlung biogener Festbrennstoffe
… were investigated chemically, by XRD, STA, and Knudsen Effusion Mass Spectrometry (KEMS). Molecular Beam Mass Spectrometry (MBMS) was used for the semi-quantitative analysis of the hot flue gas. This work provides important insights into the influence of fuel composition, ash phases, …
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Untersuchungen zur Alkalireinigung von Heißgasen für Anlagen mit Kohlenstaub-Druckfeuerung
… to boiler slags. Vaporization investigations by Knudsen effusion mass spectrometry were carried out to determine the activities of alkali species in the samples. A relationship between structural and thermodynamic properties has been determined. Since the alkali retention of coal based slags is …
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Development of macroscopic nanoporous graphene membranes for gas separation
… of selectively permeable nanopores are explored. Knudsen selectivity is achieved using macroscopic three-layer graphene membranes on polymer supports by high density ion bombardment. Separation ratios exceeding the Knudsen effusion limit are achieved with single-layer graphene on optimized …
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Structural and thermodynamic properties of sodium actinide ternary oxides
… $Na_2U_2O_7$ and $Na_4UO_5$ were evaluated using Knudsen effusion mass spectrometry (KEMS) and thermal-relaxation calorimetry. In addition, the oxygen content required at 900 K within liquid sodium to form pentavalent $Na_3UO_4$ and hexavalent $Na_4UO_5$ were calculated to be 0.7 and 1.5 wppm, …
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Investigation of thermodynamic properties of alkali metals in oxide systems relevant to coal slags
… Na2O-K2O-Al2O3-SiO2 systems were investigated by Knudsen Effusion Mass Spectrometry (KEMS). For the investigation of the binary systems the most important part of this work was finding a suitable method of preparing the samples and making the measurements since one component – sodium oxide – is …
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Construction of a chamber to measure liquid lithium alloy vapor pressures and measurement of the lead-lithium eutectic vapor pressure
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Vapor Pressures and Thermodynamic Properties of Mg(BH4)2, KBH4 and RbBH4 Using Torsion-Effusion and Thermogravimetric Method
… and rubidium borohydride (RbBH4). The torsion-effusion method was used to obtain the vapor pressures of effusing gases. The molecular weights of these gases were obtained by the gravimetric method which involved monitoring the rate of weight loss of the material in mg/h. Values of the molecular …