Jonathan Worstell's Adiabatic Fixed-Bed Reactors: Practical Guides in Chemical PDF

By Jonathan Worstell

ISBN-10: 0128013060

ISBN-13: 9780128013069

Practical courses in Chemical Engineering are a cluster of brief texts that every offers a centred introductory view on a unmarried topic. the whole library spans the most issues within the chemical method industries that engineering pros require a simple realizing of. they're ‘pocket guides’ that pro engineers can simply hold with them or entry electronically whereas working.

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Adiabatic Fixed-bed Reactors covers the basics of fixed-bed reactors, together with numerous varieties and their actual houses. purposes of every machine kind are mentioned, in addition to trouble-shooting Solid-supported Catalysts. this article is perfect for any engineer who's new to operating with fixed-bed reactors and wishes to understand the fundamentals quick and easily.

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Superficial velocities of 500 cm/h. (Reprinted with permission from J. H. Worstell, M. J. Doll, and J. M. R.

Those three supports are: 1. metallic, pure metal or metal alloys; 2. metal oxide, such as alumina, silica, or magnesia; 3. mixed metal oxide, such as silicaÀalumina. Catalyst Deactivation 37 Common metal supports are nickel, used to catalyze various hydrogenation reactions, and iron, used to synthesize ammonia. The fact that a metal support acts as a catalyst for a particular chemical reaction implies that the metal atoms on its surface are not identical: some small number of metal atoms catalyze the chemical reaction, while the majority of metal atoms are inert toward the reactant.

RA is generally defined as RA ðt 5 0Þ 5 kOverall Nðt 5 0ÞWCA where N(t 5 0) is the number of active sites per catalyst unit mass and W is the mass of catalyst in the fixed-bed reactor. Note that N is time dependent. Therefore, after a given time period, RA will be RA ðtÞ 5 kOverall NðtÞWCA Catalyst Deactivation 53 where N(t) is the number of active sites per catalyst unit mass at time t. Dividing the above equation by the equation for RA(t 5 0) gives RA ðtÞ kOverall NðtÞWCA NðtÞ 5 5 RA ðt 5 0Þ kOverall Nðt 5 0ÞWCA Nðt 5 0Þ assuming kOverall, W, and CA remain constant during the given time period.

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Adiabatic Fixed-Bed Reactors: Practical Guides in Chemical Engineering by Jonathan Worstell

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