Der Thiele-Modul ist eine dimensionslose Kennzahl aus dem Bereich der chemischen Makrokinetik, speziell der Beschreibung der Porendiffusion (gasförmig-fest oder flüssig-fest) in Feststoffkatalysatoren. Er ist benannt nach dem Chemiker Ernest W. Thiele, der ihn im Jahr 1939 einführte. Bei der heterogenen Katalyse verarmt das Innere eines porösen Katalysators an dem umzusetze… WebT is the Thiele modulus. Eq. 6 is referred to in this paper as the first order curve. Bischoff4 developed (in Cartesian coordinates) a general modulus for an arbitrary reaction rate form: M T = Lr ′ ′ ′ (C ) 2 [ D (t)r ′ ′ ′ (t)dt ] − 1 2 0 ∫C s (8) where L is the characteristic length of the particle (defined as the volume of ...
Thiele modulus explained
Web• Thiele modulus • Effectiveness factor Upon completion of this unit, you should be able to perform the following specific tasks and be able to recognize when they are needed and apply them correctly in the course of a more complex analysis: • Describe the limiting behavior of the effectiveness factor as the Thiele modulus varies and identify The Thiele Modulus was developed to describe the relationship between diffusion and reaction rates in porous catalyst pellets with no mass transfer limitations. This value is generally used to measure the effectiveness factor of pellets. The Thiele modulus is represented by different symbols in different texts, but … See more The Thiele modulus was developed by Ernest Thiele in his paper 'Relation between catalytic activity and size of particle' in 1939. Thiele reasoned that a large enough particle has a reaction rate so rapid that diffusion forces … See more The derivation of the Thiele Modulus (from Hill) begins with a material balance on the catalyst pore. For a first-order irreversible reaction in a straight cylindrical pore at steady state: See more Other order reactions may be solved in a similar manner as above. The results are listed below for irreversible reactions in straight cylindrical … See more psykostimulantti
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Web10 Feb 2024 · The Thiele tube is a type of laboratory apparatus used for measuring the mechanical properties of materials. It is named after the German physicist Ernst Thiele, who developed the concept in the early 20th century. A Thiele tube consists of a cylindrical tube that is closed at one end and has a small hole or aperture at the other end. Web21 Jul 2024 · In this video a problem based on Thiele modulus from GATE 2024 is discussed. The square of Thiele modulus MT2 is given by Where L is the characteristic … Web26 Mar 2013 · It is difficult to know what you are looking for. Your code runs, so it is at least sensible to MATLAB. And, generally speaking, an exit flag of 2 or 3 is not too bad, fsolve thinks it found a good answer in that it reduced the … psykoterapeut hudiksvall