Zur Ermittlung der Kinetik komplexer Reaktionen aus Messungen im Wirbelschichtreaktor

Sitzmann, Werner; Schößler, Manfred; Werther, Joachim

doi:10.1002/cite.330590115

Cited by 8 publications

(5 citation statements)

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“…6, right), the species have to be balanced separately in the bubble and suspension phases. Figure 40 presents a model used by Werther for a constant-volume reaction [183], [184], [188]. Here the simplifying assumption is that flow through the suspension phase is at the minimum fluidization velocity u mf .…”

Section: Bubbling Fluidized-bed Reactorsmentioning

confidence: 99%

“…In Equations (44) and (45) the following simplifying assumptions have been made: 1) Plug flow through the suspension phase at an interstitial velocity (u mf /ε mf ) 2) Bubble phase in plug flow, bubbles are solids free 3) Reaction in suspension phase only 4) Constant-volume reaction (see [183] for handling a change in number of moles) 5) Sorption effects neglected (see [188] for handling sorption)…”

Section: Bubbling Fluidized-bed Reactorsmentioning

confidence: 99%

“…However, the kinetic parameters can also be determined directly by measurements in a bench-scale fluidized-bed apparatus [183], [184].…”

Section: Modeling Of Gas -Solid Fluidized-bed Reactorsmentioning

confidence: 99%

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Fluidized-Bed Reactors

Werther

2001

Ullmann's Encyclopedia of Industrial Chemistry

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Section: Bubbling Fluidized-bed Reactorsmentioning

confidence: 99%

Section: Bubbling Fluidized-bed Reactorsmentioning

confidence: 99%

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Fluidized-Bed Reactors

Werther

2001

Ullmann's Encyclopedia of Industrial Chemistry

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“…5, left), the short-circuit flow of gas through the bubbles must be taken into account [129]. Figure 23 presents a model used for a constant-volume reaction [128,131]. 5, right), the species must be balanced separately in the bubble and suspension phases.…”

Section: Bubbling Fluidized-bed Reactorsmentioning

confidence: 99%

“…[128] shows how to handle a change in number of moles) • Sorption effects neglected (see Ref. [128] shows how to handle a change in number of moles) • Sorption effects neglected (see Ref.…”

Section: Modeling Of Fluidized-bed Reactors 2123mentioning

confidence: 99%

Fluidized‐Bed Reactors1A list of abbreviations/acronyms used in the text is provided at the end of the chapter.

Werther

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction The Fluidization Principle Forms of Fluidized Beds Advantages and Disadvantages of the Fluidized‐Bed Reactor Fluid‐Mechanical Principles Minimum Fluidization Velocity Fluidization Properties of Typical Bed Solids Gas Distribution Gas Jets in Fluidized Beds Bubble Development Elutriation Circulating Fluidized Beds Catalyst Attrition Gas Mixing in Fluidized‐Bed Reactors Gas Mixing in Bubbling Fluidized Beds Gas Mixing in Circulating Fluidized Beds Gas–Solid Separation Injection of Liquid Reactants into Fluidized Beds Industrial Applications Heterogeneous Catalytic Gas‐Phase Reactions Polymerization of Alkenes Modeling of Fluidized‐Bed Reactors Bubbling Fluidized‐Bed Reactors Circulating Fluidized‐Bed Reactors New Developments in Fluidized‐Bed Reactor Modeling Scale‐Up Bed Diameter Grid Design Internals Catalyst Particle‐Size Distribution Secondary Reactions in the Freeboard Catalyst Attrition Other Factors Conclusions List of Symbols

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Fluidized‐Bed Reactors

Werther¹

2007

Ullmann's Encyclopedia of Industrial Chemistry

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The article contains sections titled: 1. Introduction 1.1. The Fluidization Principle 1.2. Forms of Fluidized Beds 1.3. Advantages and Disadvantages of the Fluidized‐Bed Reactor 2. Fluid‐Mechanical Principles 2.1. Minimum Fluidization Velocity 2.2. Expansion of Liquid–Solid Fluidized Beds 2.3. Fluidization Properties of Typical Bed Solids 2.4. State Diagram of Fluidized Bed 2.5. Gas Distribution 2.6. Gas Jets in Fluidized Beds 2.7. Bubble Development 2.8. Elutriation 2.9. Circulating Fluidized Beds 2.9.1. Hydrodynamic Principles 2.9.2. Local Flow Structure in Circulating Fluidized Beds 2.9.3. Design of Solids Recycle System 2.10. Cocurrent Downflow Circulating Fluidized Beds (Downers) 2.11. Attrition of Solids 3. Solids Mixing in Fluidized‐Bed Reactors 3.1. Mechanisms of Solids Mixing 3.2. Vertical Mixing of Solids 3.3. Horizontal Mixing of Solids 3.4. Solids Residence‐Time Properties 3.5. Solids Mixing in Circulating Fluidized Beds 4. Gas Mixing in Fluidized‐Bed Reactors 4.1. Gas Mixing in Bubbling Fluidized Beds 4.2. Gas Mixing in Circulating Fluidized Beds 5. Heat and Mass Transfer in Fluidized‐Bed Reactors 6. Gas–Solid Separation 7. Injection of Liquid Reactants into Fluidized Beds 8. Industrial Applications 8.1. Heterogeneous Catalytic Gas‐Phase Reactions 8.2. Polymerization of Olefins 8.3. Homogeneous Gas‐Phase Reactions 8.4. Gas–Solid Reactions 8.5. Applications in Biotechnology 9. Modeling of Fluidized‐Bed Reactors 9.1. Modeling of Liquid–Solid Fluidized‐Bed Reactors 9.2. Modeling of Gas–Solid Fluidized‐Bed Reactors 9.2.1. Bubbling Fluidized‐Bed Reactors 9.2.2. Circulating Fluidized‐Bed Reactors 9.3. Newer Developments in Modeling Fluidized‐Bed Reactors 9.3.1 Computational Fluid Dynamics 9.3.2 Modeling of Fluidized‐Bed Systems 10. Scale‐up The article gives an overview on fundamentals and applications of fluidized‐bed technology. Some basic fluid‐mechanical principles—minimum fluidization velocity, status diagram, gas distribution, bubble development, and solids entrainment and elutriation—are presented at the beginning, followed by a detailed discussion of circulating fluidized beds, downers, and attrition effects in fluidized‐bed systems. Sections on solids mixing, gas mixing, and heat and mass transfer in fluidized beds complete the fundamentals section, which is followed by an overview on industrial applications. Fluidized‐bed processes for heterogeneous catalytic gas‐phase reactions, for the polymerization of olefins, for homogenous gas‐phase reactions, gas–solid reactions and applications in biotechnology are described in detail. A final chapter is devoted to the modeling of fluidized‐bed reactors.

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Zur Ermittlung der Kinetik komplexer Reaktionen aus Messungen im Wirbelschichtreaktor

Cited by 8 publications

References 2 publications

Fluidized-Bed Reactors

Fluidized-Bed Reactors

Fluidized‐Bed Reactors1A list of abbreviations/acronyms used in the text is provided at the end of the chapter.

Fluidized‐Bed Reactors

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