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Bet method

bet method

A method developed by Bruner, Emmett, and Teller for measuring surface area by using nitrogen adsorption condensation in pores at liquid nitrogen temperatu. Übersetzung im Kontext von „the B.E.T. method “ in Englisch-Deutsch von Reverso Context: Catalyst component according to claim 1 in which the surface area. The surface area determined by BET is thus normally larger than the surface area determined by air permeability. The method used complies with Ph. Eu. Mass of outgassed sample Adsorptive e. Inhaltsverzeichnis Adsorption an Festkörperoberflächen Der Bedeckungsgrad Stärke der Adsorption: If there is a negative intercept. The adsorbate gas is admitted to the two tubes either in doses or as a slow continuous flow. The simplest and would guess most common measurements that are available for BET are: Share article Email Facebook Twitter LinkedIn. The Personalities behind the BET-Method. Recent Entries Solid-Phase Extraction Chemical Composition of Boza HPLC Separation Modes Retention Time Arsenic for Breakfast, Lunch and Dinner Rocky Mountain Spotted Fever Trends Measuring Radiation Exposure from Backscatter X-ray Handbook of HPLC 2. Mitmachen Artikel verbessern Neuen Artikel anlegen Autorenportal Hilfe Letzte Änderungen Kontakt Spenden. Peter Klobes, Klaus Meyer and Ronald G. The determination of dead volume may be avoided using difference measurements, that is, by means of reference and sample tubes connected by a differential transducer. Furthermore, the authors made five assumptions: The use of a diluent gas, such as helium, is therefore unnecessary, although helium may be employed for other purposes, such as to measure the dead volume. For the calculation of certain quantities see Table 1 a desorption step is also required where a vacuum is applied in the reverse of Step 5. Mehr Dokumente und Website-Übersetzung Unternehmenslösungen Rechtschreibprüfung. Diese Seite wurde zuletzt am This plot should yield a straight line usually in the approximate relative pressure range 0. bet method The following equations can be used:. Source Sans Pro, Helvetica, Arial, sans-serif; font-size: Brunauer—Emmett—Teller BET theory aims to explain the physical adsorption of gas molecules on a solid surface and serves as the basis for an important analysis technique for the measurement of the specific surface area of materials. Before the specific surface area of the sample can be determined, it is necessary to remove gases and vapours that may have become physically adsorbed onto the surface after manufacture and during treatment, handling and storage. This in part is due to the low p0 lower saturation vapour pressure for krypton which helps reduce the dead-space correction as the gas is more likely to condense of the sample surface. The practical measurement of BET is relatively simple. The data are treated according to the Brunauer, Emmett and Teller BET adsorption isotherm equation:.

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