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Zhang Y, Lu Z, Qiao Y, Guo K, Li W, Liu H, Li X, Liu C. Gas holdup, bubble size distribution, and mass transfer in an airlift reactor with ceramic membrane and perforated plate distributor. CAN J CHEM ENG 2023. [DOI: 10.1002/cjce.24907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Affiliation(s)
- Yanan Zhang
- School of Chemical Engineering and Technology Tianjin University Tianjin China
- State Key Laboratory of Chemical Engineering Tianjin University Tianjin China
| | - Zhe Lu
- School of Chemical Engineering and Technology Tianjin University Tianjin China
- State Key Laboratory of Chemical Engineering Tianjin University Tianjin China
| | - Yong Qiao
- School of Chemical Engineering and Technology Tianjin University Tianjin China
- State Key Laboratory of Chemical Engineering Tianjin University Tianjin China
| | - Kai Guo
- School of Chemical Engineering and Technology Tianjin University Tianjin China
- State Key Laboratory of Chemical Engineering Tianjin University Tianjin China
| | - Wei Li
- Science and Technology on Aerospace Chemical Power Laboratory Hubei Institute of Aerospace Chemotechnology Xiangyang Hubei China
| | - Hui Liu
- School of Chemical Engineering and Technology Tianjin University Tianjin China
- State Key Laboratory of Chemical Engineering Tianjin University Tianjin China
| | - Xue Li
- The Institute of Seawater Desalination and Multipurpose Utilization, MNR (Tianjin) Tianjin China
| | - Chunjiang Liu
- School of Chemical Engineering and Technology Tianjin University Tianjin China
- State Key Laboratory of Chemical Engineering Tianjin University Tianjin China
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A Turbulent Mass Diffusivity Model for Predicting Species Concentration Distribution in the Biodegradation of Phenol Wastewater in an Airlift Reactor. Processes (Basel) 2023. [DOI: 10.3390/pr11020484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
In this study, a three-dimensional CFD transient model is established for predicting species concentration distribution in the biodegradation of phenol in an airlift reactor (ALR). The gas–liquid flow in the ALR is determined by the Euler–Euler method coupled with the standard k-ε model, and the bubble size is predicted by the population balance model (PBM). A turbulent mass diffusivity model is developed to simulate the turbulent mass transfer process and to predict the species concentration distribution. No empirical methods are needed as the turbulent mass diffusivity can be expressed by the concentration variance c2¯ and its dissipation rate εc. A good agreement is found between simulated and experimental results in the literature. It is not reasonable to assume a constant turbulent Schmidt number because the calculated distribution of turbulent mass diffusivity is not identical to that of turbulent viscosity. Finally, the hydrodynamic characteristics and biodegradation performance of the proposed model in a novel ALR are compared with that in the original ALR.
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Investigation of the co-processing technology of crude oil and coal and its deployment. POLISH JOURNAL OF CHEMICAL TECHNOLOGY 2022. [DOI: 10.2478/pjct-2022-0027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Abstract
The effect of process conditions on the co-processing technology of crude oil and coal was investigated. Crude oil/coal matching performance, swelling degree, crude oil/coal slurry viscosity-temperature characteristics and process parameters were obtained via the laboratory scale and pilot scale studies. The optimum reaction temperature of the co-processing was 445~450 oC, the pressure was 19 MPa, the catalyst addition was 3 wt.%, the reaction time was 2 h, and the ratio of hydrogen to crude oil was 1500 (V/V). Furthermore, the co-processing technology including catalyst and corresponding equipment based on the slurry bed hydrogenation were developed. By using this co-processing technology, the feed ratio of crude oil and coal can be 1:1, the coal conversion rate can be over 99%, the light oil (oil and aromatics) yield was over 70%, and the end products were gasoline, diesel, jet fuel, aromatics and LPG. The product quality meets the Euro V standard, whilst aromatics accounted for 48% of the light oil. So it was proved to be feasible to co-refine crude oil and coal at a ratio of 1:1. What’s more, the slurry bed hydrogenation plant and its equipment were tested for long-term operation, and it has been proved that this co-processing technology could be deployed as large-scale industrial application.
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Zhang T, Huang Q, Geng S, Chen A, Liu Y, Zhang H. Impacts of solid physical properties on the performances of a slurry external airlift loop reactor integrating mixing and separation. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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5
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Yang H, Chen A, Geng S, Cheng J, Gao F, Huang Q, Yang C. Influences of fluid physical properties, solid particles, and operating conditions on the hydrodynamics in slurry reactors. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2021.03.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Shi J, Guo K, Wang Z, Zheng L, Liu H, Xiang W, Liu C, Li X. Computational Fluid Dynamics Simulation of Hydrodynamics in a Two-Stage Internal Loop Airlift Reactor with Contraction-Expansion Guide Vane. ACS OMEGA 2021; 6:6981-6995. [PMID: 33748612 PMCID: PMC7970565 DOI: 10.1021/acsomega.0c06277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2020] [Accepted: 02/18/2021] [Indexed: 06/12/2023]
Abstract
Global circulation and liquid back mixing adversely affect the continuous production of a multistage internal airlift loop reactor. A contraction-expansion guide vane (CEGV) is proposed and combined with a two-stage internal loop airlift reactor (TSILALR) to suppress the liquid back mixing between stages. A computational fluid dynamics (CFD) simulation is conducted to evaluate the performance of the CEGV in the TSILALR. The bubble size distribution and turbulent flow properties in the TSILALR are considered in the CFD simulation by using the population balance model and RNG k-ε turbulence model. The CFD model is validated against the experimental results. The deviations in the gas holdup and mean bubble diameter between the simulation and experimental results are less than 8% and 6%, respectively. The streamlines, flow pattern, bubble size distribution, and axial liquid velocity in the TSILALRs with and without the CEGV at superficial velocities of 0.04 and 0.08 m/s are obtained by CFD simulation. It has been shown that the CEGV generated local circulation flows at each stage instead of a global circulation flow in the TSILALR. The average global gas holdup in the TSILALR with a CEGV increased up to 1.98 times. The global gas holdup increased from 0.045 to 0.101 and the average axial velocity in the riser decreased from 0.314 to 0.241 m/s when the width of the CEGV increased from 50 to 75 mm at the superficial gas velocity of 0.08 m/s.
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Affiliation(s)
- Jiazhen Shi
- School
of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- State
Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
| | - Kai Guo
- School
of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- State
Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
| | - Zhengchao Wang
- School
of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- State
Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
| | - Longyun Zheng
- School
of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- State
Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
| | - Hui Liu
- School
of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- State
Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
| | - Wenyu Xiang
- School
of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- State
Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
| | - Chunjiang Liu
- School
of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- State
Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
| | - Xue Li
- The
Institute of Seawater Desalination and Multipurpose Utilization, MNR
(Tianjin), Tianjin 300192, China
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Yang T, Geng S, Gao F, He T, Cheng J, Huang Q, Yang C. Investigation of hydrodynamics and mass transfer in an internal loop airlift slurry reactor integrating mixing and separation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Zhang X, Zhu P, Li S, Fan W, Lian J. CFD-PBM simulation of hydrodynamics of microbubble column with shear-thinning fluid. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2020-0172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A numerical simulation was performed to study the hydrodynamics of micro-bubble swarm in bubble column with polyacrylamide (PAM) aqueous solution by using computational fluid dynamics coupled with population balance models (CFD-PBM). By considering rheological characteristics of fluid, this approach was able to accurately predict the features of bubble swarm, and validated by comparing with the experimental results. The gas holdup, turbulent kinetic energy and liquid velocity of bubble column have been elucidated by considering the influences of superficial gas velocity and gas distributor size respectively. The results show that with the rise of the superficial gas velocity, the gas holdup and its peak width increase significantly. Especially, the curve peak corresponding to high gas velocity tends to drift obviously toward the right side. Except for the occurrence of a smooth holdup peak at the column center under the condition of the moderate distributor size, the gas holdups for the small and large distributor sizes become flat in the radial direction respectively. The distribution of turbulent kinetic energy presents an increasingly asymmetrical feature in the radial direction and also its variation amplitude enhances obviously with the rise of gas velocity. The increase in gas distributor size can enhance markedly turbulent kinetic energy as well as its overall influenced width. At the low and moderate superficial gas velocity, the curves of the liquid velocity in radial direction present the Gaussian distributions, whereas the perfect distribution always is broken in the symmetry for high gas velocity. Both liquid velocities around the bubble column center and the ones near both column walls go up consistently with the gas distributor size, especially near the walls at the large distributor size condition.
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Affiliation(s)
- Xi Zhang
- Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering , Tianjin University of Technology , Tianjin 300384 , China
| | - Ping Zhu
- Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering , Tianjin University of Technology , Tianjin 300384 , China
| | - Shuaichao Li
- Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering , Tianjin University of Technology , Tianjin 300384 , China
| | - Wenyuan Fan
- Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering , Tianjin University of Technology , Tianjin 300384 , China
| | - Jingyan Lian
- Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering , Tianjin University of Technology , Tianjin 300384 , China
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Influences of top clearance and liquid throughput on the performances of an external loop airlift slurry reactor integrated mixing and separation. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2020.03.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Lu X, Zheng X, Ding Y, Lin W, Wang W, Yu J. Experimental study on the influence of the orifice size on hydrodynamic characteristics and bubble size distribution of an external loop airlift reactor. CAN J CHEM ENG 2020. [DOI: 10.1002/cjce.23699] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xia Lu
- School of Mechanical and Electronic EngineeringWuhan Institute of Technology Wuhan City P. R. China
- The College of Post and Telecommunication of Wuhan Institute of Technology Wuhan City P. R. China
| | - Xiaotao Zheng
- School of Mechanical and Electronic EngineeringWuhan Institute of Technology Wuhan City P. R. China
| | - Yigang Ding
- School of Chemical and Engineering and PharmacyWuhan Institute of Technology Wuhan City P. R. China
| | - Wei Lin
- School of Mechanical and Electronic EngineeringWuhan Institute of Technology Wuhan City P. R. China
| | - Wei Wang
- School of Mechanical and Electronic EngineeringWuhan Institute of Technology Wuhan City P. R. China
| | - Jiuyang Yu
- School of Mechanical and Electronic EngineeringWuhan Institute of Technology Wuhan City P. R. China
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11
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Hydrodynamics and mass transfer in a slurry external airlift loop reactor integrating mixing and separation. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2019.115294] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Chen A, Yang W, Geng S, Gao F, He T, Wang Z, Huang Q. Modeling of Microbubble Flow and Coalescence Behavior in the Contact Zone of a Dissolved Air Flotation Tank Using a Computational Fluid Dynamics–Population Balance Model. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03604] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aqiang Chen
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT), Chinese Academy of Sciences (CAS), Qingdao 266101, Shandong, China
- State Key Laboratory of Heavy Oil, China University of Petroleum (East China), Qingdao 266580, Shandong, China
- University of Chinese Academy of Sciences, Beijing 100080, China
- Dalian National Laboratory for Clean Energy (DNL), Chinese Academy of Sciences, Dalian 116000, China
| | - Wensan Yang
- State Key Laboratory of Heavy Oil, China University of Petroleum (East China), Qingdao 266580, Shandong, China
| | - Shujun Geng
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT), Chinese Academy of Sciences (CAS), Qingdao 266101, Shandong, China
- University of Chinese Academy of Sciences, Beijing 100080, China
- Dalian National Laboratory for Clean Energy (DNL), Chinese Academy of Sciences, Dalian 116000, China
| | - Fei Gao
- Petrochemical Research Institute, China National Petroleum Corporation (CNPC), Beijing 100083, China
| | - Taobo He
- Petrochemical Research Institute, China National Petroleum Corporation (CNPC), Beijing 100083, China
| | - Zhenbo Wang
- State Key Laboratory of Heavy Oil, China University of Petroleum (East China), Qingdao 266580, Shandong, China
| | - Qingshan Huang
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology (QIBEBT), Chinese Academy of Sciences (CAS), Qingdao 266101, Shandong, China
- University of Chinese Academy of Sciences, Beijing 100080, China
- Dalian National Laboratory for Clean Energy (DNL), Chinese Academy of Sciences, Dalian 116000, China
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Xiao H, Geng S, Chen A, Yang C, Gao F, He T, Huang Q. Bubble formation in continuous liquid phase under industrial jetting conditions. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2019.02.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Lu X, Ding Y, Yu J, Long B, Zheng X. Experimental study of hydrodynamics and bubble size distribution of an external loop airlift reactor. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23456] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xia Lu
- School of Chemical and Engineering and PharmacyWuhan Institute of TechnologyWuhan CityHubei ProvinceP. R. China
- The College of Post and Telecommunication of Wuhan Institute of TechnologyWuhan CityHubei ProvinceP. R. China
| | - Yigang Ding
- School of Chemical and Engineering and PharmacyWuhan Institute of TechnologyWuhan CityHubei ProvinceP. R. China
| | - Jiuyang Yu
- School of Mechanical and Electronic EngineeringWuhan Institute of TechnologyWuhan CityHubei ProvinceP. R. China
| | - Bingwen Long
- School of Chemical and Engineering and PharmacyWuhan Institute of TechnologyWuhan CityHubei ProvinceP. R. China
| | - Xiaotao Zheng
- School of Mechanical and Electronic EngineeringWuhan Institute of TechnologyWuhan CityHubei ProvinceP. R. China
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15
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Xu C, Wang J, Gu X, Feng L. Modeling of molecular weight and copolymer composition distributions for ethylene‐propylene solution copolymerization. AIChE J 2019. [DOI: 10.1002/aic.16632] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chao‐Zhong Xu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou People's Republic of China
| | - Jia‐Jun Wang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou People's Republic of China
| | - Xue‐Ping Gu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou People's Republic of China
| | - Lian‐Fang Feng
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological EngineeringZhejiang University Hangzhou People's Republic of China
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Han T, Liu H, Xiao H, Chen A, Huang Q. Experimental study of the effects of apex section internals and conical section length on the performance of solid–liquid hydrocyclone. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.02.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Yang T, Geng S, Yang C, Huang Q. Hydrodynamics and mass transfer in an internal airlift slurry reactor for process intensification. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.03.040] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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18
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Li D, Guo K, Li J, Huang Y, Zhou J, Liu H, Liu C. Hydrodynamics and bubble behaviour in a three-phase two-stage internal loop airlift reactor. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2018.03.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Wang Z, Sun B, Huang Q, Jiang F. An integrated model for predicting the flame propagation in crimped ribbon flame arresters. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2017.12.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Zhang X, Guo K, Qi W, Zhang T, Liu C. Gas holdup, bubble behaviour, and mass transfer characteristics in a two-stage internal loop airlift reactor with different screens. CAN J CHEM ENG 2017. [DOI: 10.1002/cjce.22767] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaobo Zhang
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 P. R. China
- State Key Laboratory of Chemical Engineering; Tianjin University; Tianjin 300072 P. R. China
| | - Kai Guo
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 P. R. China
- State Key Laboratory of Chemical Engineering; Tianjin University; Tianjin 300072 P. R. China
| | - Wenzhe Qi
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 P. R. China
- State Key Laboratory of Chemical Engineering; Tianjin University; Tianjin 300072 P. R. China
| | - Ting Zhang
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 P. R. China
- State Key Laboratory of Chemical Engineering; Tianjin University; Tianjin 300072 P. R. China
| | - Chunjiang Liu
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 P. R. China
- State Key Laboratory of Chemical Engineering; Tianjin University; Tianjin 300072 P. R. China
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