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Research and development of advanced structured packing in a rotating packed bed

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Chinese Journal of Chemical Engineering 2022年第9期35卷 178-186页

作者： Zhi-Guo Yuan Yu-Xia Wang You-Zhi Liu Dan Wang Wei-Zhou Jiao Peng-Fei Liang Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering North University of ChinaTaiyuan 030051China

As the core component of the rotating packing bed,packing is a place for efficient gas–liquid mixing and mass *** this paper,a 3D structured packing composed of a mesh structure and a support structure was *** mesh structure is a ring-shaped mesh surrounded by triangular meshes,which is stable in structure and can achieve a high degree of dispersion and aggregation of the liquid *** support structure is composed of ring-shaped structural units arranged at a certain angle along the axial direction,which can enhance the turbulence of the airflow while constructing regular gas-phase *** steel meshes of different diameters and supporting structures are alternately combined to form 3D packing,which is loaded in a layered cross-flow rotating packing *** results show that under the same operating conditions,the mass transfer performance of 3D packing and wire mesh packing are equivalent,and both are better than pall ring ***,the pressure drop of 3D packing is significantly lower than that of pall ring packing and wire mesh *** design and implementation of packing the development presented in this paper can be used to develop special structured packing for rotating bed,which can further improve the performance of rotating packed bed(RPB).

关键词： rotating packed bed 3D printed packing 3D modeling Mass transfer Pressure drop Gas–liquid channel

Computational fluid dynamic simulation of gas-liquid flow in rotating packed bed:A review

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Chinese Journal of Chemical Engineering 2022年第1期35卷 85-108页

作者： Wen-Cong Chen Ya-Wei Fan Liang-Liang Zhang Bao-Chang Sun Yong Luo Hai-Kui Zou Guang-Wen Chu Jian-Feng Chen Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China StateKey Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China

The rotating packed bed(RPB)has been widely used in gas-liquid flow systems as a process intensification device,exhibiting excellent mass transfer enhancement ***,the complex internal structure and the high-speed rotation of the rotor in RPB bring significant challenges to study the intensification mechanism by experiment *** the past two decades,Computational fluid dynamics(CFD)has been gradually applied to simulate the hydrodynamics and mass transfer characteristics in RPB and instruct the reactor *** article covers the development of the CFD simulation of gasliquid flow in ***,the improvement of the simulation method in the aspect of mathematical models,geometric models,and solving methods is ***,new progress of CFD simulation about hydrodynamic and mass transfer characteristics in RPB is reviewed,including pressure drop,velocity distribution,flow pattern,and concentration distribution,*** new phenomena such as the end effect area with the maximum turbulent have been revealed by this *** addition,the exploration of developing new reactor structures by CFD simulation is introduced and it is proved that such new structures are competitive to different *** defects of current research and future development directions are also discussed at last.

关键词： rotating packed bed Computational fluid dynamics Simulation Hydrodynamics Mass transfer

Removal of nitric oxide from simulated flue gas using aqueous persulfate with activation of ferrous ethylenediaminetetraacetate in the rotating packed bed

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Frontiers of Chemical Science and Engineering 2023年第4期17卷 460-469页

作者： Da Guo Guisheng Qi Dong Chen Jiabao Niu Youzhi Liu Weizhou Jiao Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering North University of ChinaTaiyuan 030051China School of Chemistry and Chemical Engineering North University of ChinaTaiyuan 030051China

Nitric oxide being a major gas pollutant has attracted much attention and various technologies have been developed to reduce NO emission to preserve the *** persulfate oxidation technology is a workable and effective choice for wet flue gas denitrification due to its high efficiency and green ***,NO absorption rate is limited and affected by mass transfer limitation of NO and aqueous persulfate in traditional *** this study,a rotating packed bed(RPB)was employed as a gas-liquid absorption device to elevate the NO removal efficiency(η_(NO))by aqueous persulfate((NH_(4))_(2)S_(2)O_(8))activated by ferrous ethylenediaminetetraacetate(Fe^(^(2+))-EDTA).The experimental results regarding the NO absorption were obtained by investigating the effect of various operating parameters on the removal efficiency of NO in *** the concentration of(NH_(4))_(2)S_(2)O_(8) and liquid-gas ratio could promoted the oxidation and absorption of NO while theη_(NO) decreased with the increase of the gas flow and NO *** addition,improving the high gravity factor increased theη_(NO) and the total volumetric mass transfer coefficient(K_(G)α )which raise theη_(NO) up to more than 75%under the investigated *** observations proved that the RPB can enhance the gas-liquid mass transfer process in NO *** correlation formula between K_(G)α and the influencing factors was determined by regression calculation,which is used to guide the industrial scale-up application of the system in NO *** presence of O_(2) also had a negative effect on the NO removal process and through electron spin resonance spectrometer detection and product analysis,it was revealed that Fe^(2+)-EDTA activated(NH_(4))2S_(2)O_(8) to produce•SO_(4)^(-),•OH and•O_(2)^(-),played a leading role in the oxidation of NO,to produce NO_(3)^(-)as the final *** obtained results demonstrated a good applicable potential of RPB/PS/Fe^(2+)-EDTA in the

关键词： rotating packed bed Fe2+-EDTA sulfate radical hydroxyl radical NO removal efficiency

Catalytic decomposition and mass transfer of aqueous ozone promoted by Fe-Mn-Cu/γ-Al2O_(3) in a rotating packed bed

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Chinese Journal of Chemical Engineering 2022年第5期35卷 133-142页

作者： Weizhou Jiao Xingyue Wei Shengjuan Shao Youzhi Liu Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering National Demonstration Center for Experimental Comprehensive Chemical Engineering EducationNorth University of ChinaShanxi 030051China Key Laboratory of Industrial Ecology and Environmental Engineering(MOE) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

This study investigated catalytic decomposition and mass transfer of aqueous ozone promoted by Fe-MnCu/γ-Al_(2)O_(3)(Cat)in a rotating packed bed(RPB)for the first *** results showed that the value of the overall decomposition rate constant of ozone(K_(c))and overall volumetric mass transfer coefficient(K_(L)a)are 4.28×10^(-3) s^(-1) and 11.60×10^(-3) s^(-1) respectively at an initial pH of 6,βof 40,Co3(g)of 60 mg·L^(-1)and Q_(L) of 85 L·h^(-1) in deionized water,***,the K_(c) and K_(L)a values of Fenhe water are0.88×10^(-3) s^(-1) and 2.51×10^(-3) s^(-1) lower than deionized water,*** addition,the K_(c) and K_(L)a values in deionized water for the Cat/O_(3)-RPB system are 44.86%and 47.41%higher than that for the Cat/O_(3)-BR(bubbling reactor)system,respectively,indicating that the high gravity technology can facilitate the decomposition and mass transfer of ozone in heterogeneous catalytic ozonation and provide some insights into the industrial wastewater.

关键词： rotating packed bed Ozone Heterogeneous catalysis Overall decomposition rate constant Overall volumetric mass transfer coefficient

Preparation and characterization of NaY zeolite in a rotating packed bed

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Petroleum Science 2012年第1期9卷 106-109页

作者： Xu Yongquan Cai Lianguo Shao Lei Chen Jianfeng Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China Department of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuangHebei 050018China

NaY Zeolite was synthesized in a rotating packed bed （RPB） for the first time. A Si-A1 gel with a specific composition was used as the structure-directing agent. The as-synthesized NaY Zeolite was characterized with scanning electron microscopy （SEM）, X-ray diffraction （XRD） and specific surface area （BET）. The characterization result showed that the NaY Zeolite had a particle size of approximately 200 rim, n（SiO2）/n（Al203） ratio of 5.03, crystallinity of 96% and specific surface area of 714 m2/g. The experimental results indicated that the structure of NaY Zeolite was related to the synthesis conditions （such as reactors, crystallization time and so on）. The micromixing efficiency was proven to be the most important factor for synthesis of NaY Zeolite in the high-gravity environment in RPB.

关键词： NaY zeolite crystallinity high-gravity preparation characterization rotating packed bed

Numerical simulation and experimental study of the characteristics of packing feature size on liquid flow in a rotating packed bed

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Chinese Journal of Chemical Engineering 2021年第6期34卷 22-31页

作者： Xifan Duan Zhiguo Yuan Youzhi Liu Hangtian Li Weizhou Jiao Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering North University of ChinaTaiyuan 030051China

rotating packed bed has high efficiency of gas-liquid mass *** it is significant to investigate fluid motion in rotating packed *** simulations of the effects of packing feature size on liquid flow characteristics in a rotating packed bed are reported in this *** particle image velocimetry is compared with the numerical simulations to validate the turbulent *** show that the liquid exists in the packing zone in the form of droplet and liquid line,and the cavity is *** the radial thickness of the packing is less than 0.101 m,liquid line and droplets appear in the *** rotational speed and radial thickness of the packing increase,the average diameter of the droplets becomes smaller,and the droplet size distribution becomes *** the initial velocity of the liquid increases,the average droplet diameter increases and the uniformity of particle size distribution become *** droplet velocity increases with the radial thickness of the packing increasing,and gradually decreases when it reaches the cavity *** effect of packing thickness is most substantial through linear *** predicted and simulated values are within±15%.The cumulative volume distribution curves of the experimental and simulated droplets are consistent with the R-R distribution.

关键词： Chemical process strengthening equipment rotating packed bed Computational fluid dynamics Particle image velocimetry Sieve packing

Synthesis of Silver Sulf ide Quantum Dots Via the Liquid–Liquid Interface Reaction in a rotating packed bed Reactor

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Transactions of Tianjin University 2020年第4期26卷 273-282页

作者： Qing Liu Yuan Pu Zhijian Zhao Jiexin Wang Dan Wang State Key Laboratory of Organic Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China

We 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)*** 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 ***2S QDs can disperse well in various organic solvents and exhibit NIR luminescence with a peak wavelength at 1270 nm under 980-nm laser *** 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 *** study provides a novel approach for the continuous and ultrafast synthesis of NIR Ag2S QDs for potential scale-up.

关键词： Ag2S quantum dots Near-infrared luminescence rotating packed bed Liquid-liquid interface reaction Process intensification

Comparison of Mass Transfer Characteristics between Countercurrent-Flow and Crosscurrent-Flow rotating packed bed

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China Petroleum Processing & Petrochemical Technology 2019年第4期21卷 103-111页

作者： Qi Guisheng Guo Linya Liu Youzhi Zhang Dongming Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology North University of ChinaTaiyuan 030051 Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering Taiyuan 030051

The rotating packed bed(RPB), mainly including the countercurrent-flow RPB(Counter-RPB) and the crosscurrentflow RPB(Cross-RPB) that are classified from the perspective of gas-liquid contact style, is a novel process intensification device. A significant measurement standard for evaluating the performance of RPB is the mass transfer effect. In order to compare the mass transfer characteristics of Counter-RPB and Cross-RPB with the same size, the liquid volumetric mass transfer coefficient(k_La_e) and effective interfacial area(a_e) were measured under identical operating conditions. Meanwhile, the comparison of comprehensive mass transfer performance was conducted using the ratio of ΔP(pressure drop) to kLae as the standard. Experimental results indicated that kLae and ae increased with the increase in liquid spray density q, gas velocity u, and high gravity factor β. Furthermore, compared with the Cross-RPB, the Counter-RPB has higher liquid volumetric mass transfer coefficient and slightly larger effective interfacial area. The experimental results of comprehensive mass transfer performance showed that the Counter-RPB had higher ΔP/k_La_e than the Cross-RPB with changes in liquid spray density and high gravity factor, and there exists a turning point at 0.71 m/s accompanied by a variation with gas velocity. Moreover, the relative error of experimental value to calculated value, which was computed by the correlative expressions of kLae, was less than 5 %. In conclusion, the mass transfer characteristics of RPB are deeply impacted by the manner in which the flows are established and the Cross-RPB would have a great potential for industrial scale-up applications.

关键词： rotating packed bed mass transfer crosscurrent-flow countercurrent-flow process intensi fication

Characteristics of Fin Baffle Packing Used in rotating packed bed

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Chinese Journal of Chemical Engineering 2010年第1期18卷 55-60页

作者：栗秀萍刘有智 School of Chemical Engineering and Environment North University of China Taiyuan 030051 China Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology Taiyuan 030051 China

For an alcohol/water system and with fin baffle packing,continuous distillation experiments were carried out in a rotating packed bed(RPB)system at atmospheric *** effects of the average high gravity factor(β),liquid reflux ratio(R)and feedstock flux(F)on the momentum transfer and mass transfer were investigated. The gas phase pressure drop of RPB increased with the average high gravity factor,liquid reflux ratio and feedstock flux,which was 13.55-64.37 Pa atβof 2.01-51.49,R of 1.0-2.5,and F of 8-24 L·h1for a theoretical tray in the RPB with fin baffle *** investigation on the mass transfer in the RPB with different packings showed that the number of transfer units of RPB with a packing also increased with the average high gravity factor,reflux ratio and feedstock *** is found that the fin baffle packing(packing III)presents the best mass transfer performance and lowest pressure drop for the height equivalent to a theoretical plate(HETP),which is 6.59-9.84 mm.

关键词： characteristic fin baffle packing distillation rotating packed bed