Influence of statistical activity variations in diluted catalyst beds on the thermal reactor behavior: Derivation of an a priori criterion

Ganzer, Gunnar; Freund, Hannsjörg

doi:10.1016/j.ces.2020.115607

Cited by 10 publications

(4 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For an exothermic reaction, with respect to the ideal case (i.e., averagely distributed catalyst), nonideal dilution may lead to temperature deviations in the range of ± 10 °C, which are considered significant with respect to reactor design under safe operation. 163 PRCFD could give even more detailed insights into diluted fixed-bed reactors, where active and inert particles are spatially resolved. Another aspect to be considered in multi-tubular reactor models is the multiplicity of possible operating conditions inside the single tubes and non-idealities.…”

Section: Industrial Reactor-scale Simulationsmentioning

confidence: 99%

Quo vadis multiscale modeling in reaction engineering? – A perspective

Wehinger

Ambrosetti

Cheula

et al. 2022

Chemical Engineering Research and Design

Self Cite

View full text Add to dashboard Cite

Section: Industrial Reactor-scale Simulationsmentioning

confidence: 99%

Quo vadis multiscale modeling in reaction engineering? – A perspective

Wehinger

Ambrosetti

Cheula

et al. 2022

Chemical Engineering Research and Design

Self Cite

View full text Add to dashboard Cite

“…The mass balance of the main parameters of flow-type reactor for pyrrole synthesis was calculated [25,26].…”

Section: Introductionmentioning

confidence: 99%

Calculation and Design of an Industrial Reactor for Pyrroles Synthesis

Shokirov¹,

Turabdjanov²,

Kadirov³

et al. 2021

News of NAN RK. SGTS

View full text Add to dashboard Cite

Industry of pyrroles synthesis on the basis of acetylene, ammonia and amines over polyfunctional catalyst can be organised only when for its recovery the rational industrial technology allowing to synthesize this product in necessary quantity and demanded quality cheap enough from accessible raw materials is developed. Considering the issues related to the development of a new reactor with high productivity and economic efficiency, the processes running in the reactor were studied. Phase characteristics have been investigated in response to changes in acetylene conversion rate due to the height of the catalyst layer. As a result, high productivity of acetylene production with zinc-chromaluminum catalyst at the temperature range of 340-440оС is achieved for 92% when the layer height is 1200 mm from the reactor top point. Based on the mass balance as well as the experimental result, a reactor for the industrial synthesis of pyrroles has been proposed.

show abstract

“…Nevertheless, the formation of hot or cold spots is still possible, because the loading of the particles is a statistical process, leading to fluctuations in the local activity. 3,4 To intensify the heat transfer in fixed bed reactors, new concepts have been introduced in recent years. A new class of supports is represented by structured catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…Another possibility to avoid hot or cold spots is a defined catalyst bed dilution with inert material to decrease the active phase in the reactor. Nevertheless, the formation of hot or cold spots is still possible, because the loading of the particles is a statistical process, leading to fluctuations in the local activity. , …”

Section: Introductionmentioning

confidence: 99%

Systematic Experimental Investigations and Modeling of the Heat Transfer in Additively Manufactured Periodic Open Cellular Structures with Diamond Unit Cell

Littwin

Röder

Freund

2021

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

Additively manufactured periodic open cellular structures (POCS) represent a new class of structured catalyst carriers due to their favorable characteristics such as high specific surface area, low pressure drop, and remarkable heat transport properties. The periodic, well-defined, and reproducible geometry makes systematic investigations and geometric optimization possible. For a detailed optimization, models for the description of the transport characteristics of POCS are necessary. Besides the geometric parameters of the unit cell, the unit-cell geometry itself has a major effect on the dispersive thermal conductivity. POCS based on the diamond unit cell show a superior dynamic thermal conductivity in comparison to cubic structures and are therefore examined in detail. From the measurement results and the corresponding model parameters, influences of the geometric parameters of the structures are found. This leads to new design correlations for the heat transport in POCS. With this, a model-based optimization of POCS for a specific application, such as strongly exothermic reactions, is possible.

show abstract

Influence of statistical activity variations in diluted catalyst beds on the thermal reactor behavior: Derivation of an a priori criterion

Cited by 10 publications

References 46 publications

Quo vadis multiscale modeling in reaction engineering? – A perspective

Quo vadis multiscale modeling in reaction engineering? – A perspective

Calculation and Design of an Industrial Reactor for Pyrroles Synthesis

Systematic Experimental Investigations and Modeling of the Heat Transfer in Additively Manufactured Periodic Open Cellular Structures with Diamond Unit Cell

Contact Info

Product

Resources

About