Scale-up Preparation of Organized Mesoporous Alumina in a Rotating Packed Bed

2007 ◽  
Vol 46 (10) ◽  
pp. 3317-3320 ◽  
Author(s):  
Rui-Hong Zhao ◽  
Cui-Ping Li ◽  
Fen Guo ◽  
Jian-Feng Chen
Keyword(s):  
Scale Up ◽  
Packed Bed ◽  
Mesoporous Alumina ◽  
Rotating Packed Bed ◽  
Organized Mesoporous Alumina

Study on the synthesis of organized mesoporous alumina in a rotating packed bed

2013 ◽  
Vol 48 (2) ◽  
pp. 290-294 ◽  
Author(s):  
Zhisong Tang ◽  
Fen Guo ◽  
Baochang Sun ◽  
Xiangsen Wu
Keyword(s):  
Packed Bed ◽  
Mesoporous Alumina ◽  
Rotating Packed Bed ◽  
Organized Mesoporous Alumina

scholarly journals Synthesis of Silver Sulfide Quantum Dots Via the Liquid–Liquid Interface Reaction in a Rotating Packed Bed Reactor

2019 ◽  
Vol 26 (4) ◽  
pp. 273-282 ◽  
Author(s):  
Qing Liu ◽  
Yuan Pu ◽  
Zhijian Zhao ◽  
Jiexin Wang ◽  
Dan Wang
Keyword(s):  
Quantum Dots ◽  
Scale Up ◽  
Interface Reaction ◽  
Packed Bed ◽  
Silver Sulfide ◽  
Liquid Interface ◽  
Packed Bed Reactor ◽  
Dynamics Simulation ◽  
Rotating Packed Bed ◽  
Nir Luminescence

AbstractWe developed the high-gravity coupled liquid–liquid interface reaction technique on the basis of the rotating packed bed (RPB) reactor for the continuous and ultrafast synthesis of silver sulfide (Ag2S) quantum dots (QDs) with near-infrared (NIR) luminescence. The formation of Ag2S QDs occurs at the interface of microdroplets, and the average size of Ag2S QDs was 4.5 nm with a narrow size distribution. Ag2S QDs can disperse well in various organic solvents and exhibit NIR luminescence with a peak wavelength at 1270 nm under 980-nm laser excitation. The mechanism of the process intensification was revealed by both the computational fluid dynamics simulation and fluorescence imaging, and the mechanism is attributed to the small and uniform droplet formation in the RPB reactor. This study provides a novel approach for the continuous and ultrafast synthesis of NIR Ag2S QDs for potential scale-up.

Scale-Up of a Rotating Packed Bed Reactor with a Mesh-Pin Rotor: (I) Hydrodynamic Studies

2020 ◽  
Vol 59 (11) ◽  
pp. 5114-5123 ◽  
Author(s):  
Wei Liu ◽  
Yong Luo ◽  
Ya-Zhao Liu ◽  
Guang-Wen Chu
Keyword(s):  
Scale Up ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Rotating Packed Bed

scholarly journals CFD Simulation of Dry Pressure Drop in a Cross-Flow Rotating Packed Bed

2021 ◽  
Vol 11 (21) ◽  
pp. 10099
Author(s):  
Chao Zhang ◽  
Weizhou Jiao ◽  
Youzhi Liu ◽  
Guisheng Qi ◽  
Zhiguo Yuan ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Gas Flow ◽  
Cfd Simulation ◽  
Complex Structure ◽  
Scale Up ◽  
Cross Flow ◽  
Packed Bed ◽  
Rotating Packed Bed ◽  
Porous Media Model ◽  
The Cross

The cross-flow rotating packed bed (RPB) has attracted wide attention in recent years because of its advantages of large gas capacity, low pressure drop and lack of flooding limitation. However, the complex structure of the packing makes it difficult to obtain the gas flow characteristics in the cross-flow RPB by experiments. In this study, the dry pressure drop in the cross-flow RPB was investigated by computational fluid dynamics (CFD). The packing was modeled by the porous media model and the rotation of the packing was simulated by the sliding mesh model. The simulation results obtained by three turbulence models were compared with experimental results, and the RNG k-ε model was found to best describe the turbulence behaviors in the cross-flow RPB. Then, the effects of gas flow rate and rotating speed on dry pressure drop in different parts of the cross-flow RPB were analyzed. The results of this study can provide important insights into the design and scale-up of cross-flow RPB.

scholarly journals A Review of Modeling Rotating Packed Beds and Improving Their Parameters: Gas—Liquid Contact

2021 ◽  
Vol 13 (14) ◽  
pp. 8046
Author(s):  
Farhad Ghadyanlou ◽  
Ahmad Azari ◽  
Ali Vatani
Keyword(s):  
Mass Transfer ◽  
Scale Up ◽  
Packed Bed ◽  
Packed Beds ◽  
Transfer Coefficients ◽  
Dimensionless Numbers ◽  
Two Phase ◽  
Shape Factors ◽  
Area Of Interest ◽  
Rotating Packed Bed

The aim of this review is to investigate a kind of process intensification equipment called a rotating packed bed (RPB), which improves transport via centrifugal force in the gas—liquid field, especially by absorption. Different types of RPB, and their advantages and effects on hydrodynamics, mass transfer, and power consumption under available models, are analyzed. Moreover, different approaches to the modeling of RPB are discussed, their mass transfer characteristics and hydrodynamic features are compared, and all models are reviewed. A dimensional analysis showed that suitable dimensionless numbers could make for a more realistic definition of the system, and could be used for prototype scale-up and benchmarking purposes. Additionally, comparisons of the results demonstrated that Re, Gr, Sc, Fr, We, and shape factors are effective. In addition, a study of mass transfer models revealed that the contact zone was the main area of interest in previous studies, and this zone was not evaluated in the same way as packed beds. Moreover, CFD studies revealed that the realizable k-ε turbulence model and the VOF two-phase model, combined with experimental reaction or mass transfer equations for analyzing hydrodynamic and mass transfer coefficients, could help define an RPB system in a more realistic way.

Design of a continuous flow immobilized-cell reactor for biosynthetical production of L-aspartic acid

1985 ◽  
Vol 50 (10) ◽  
pp. 2122-2133 ◽  
Author(s):  
Jindřich Zahradník ◽  
Marie Fialová ◽  
Jan Škoda ◽  
Helena Škodová
Keyword(s):  
Aspartic Acid ◽  
Continuous Flow ◽  
Immobilized Cells ◽  
Scale Up ◽  
Fixed Bed ◽  
Packed Bed ◽  
Fixed Bed Reactor ◽  
Experimental Program ◽  
Design Parameters ◽  
Immobilized Cell

An experimental study was carried out aimed at establishing a data base for an optimum design of a continuous flow fixed-bed reactor for biotransformation of ammonium fumarate to L-aspartic acid catalyzed by immobilized cells of the strain Escherichia alcalescens dispar group. The experimental program included studies of the effect of reactor geometry, catalytic particle size, and packed bed arrangement on reactor hydrodynamics and on the rate of substrate conversion. An expression for the effective reaction rate was derived including the effect of mass transfer and conditions of the safe conversion-data scale-up were defined. Suggestions for the design of a pilot plant reactor (100 t/year) were formulated and decisive design parameters of such reactor were estimated for several variants of problem formulation.

Support vector regression-based model for phenol adsorption in rotating packed bed adsorber

2021 ◽  
Author(s):  
Rameez Ahmad Aftab ◽  
Sadaf Zaidi ◽  
Mohd Danish ◽  
Sayed Mohammad Adnan ◽  
Khursheed B. Ansari ◽  
...  
Keyword(s):  
Support Vector Regression ◽  
Packed Bed ◽  
Support Vector ◽  
Phenol Adsorption ◽  
Rotating Packed Bed
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