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Li W, Zhang Y, Zhao Z, Liu C, Wang Y, Shen M, Dai H, Yang Y, Zheng C, Gao X. Simulation investigation on marine exhaust gas SO 2 absorption by seawater scrubbing. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2022; 72:383-402. [PMID: 34874231 DOI: 10.1080/10962247.2021.2003912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 10/17/2021] [Accepted: 10/28/2021] [Indexed: 06/13/2023]
Abstract
Ships have become an important source of SO2 emission in coastal areas with the rapid development of maritime transport. It is of great significance to develop a marine scrubber for reducing SO2 emission of ships. In this study, numerical simulation of a full-scale marine spray scrubber is conducted to investigate two-phase flow pattern and SO2 absorption process in the scrubber. A desulfurization model based on seawater absorbent is coupled into the simulation, which considers the mass transfer between phases and seawater aqueous phase chemistry simultaneously. A distribution ring is introduced in the scrubber to enhance the desulfurization performance of the scrubber. The result of simulation shows that the distribution ring can optimize effectively the distribution of gas-liquid phases and enhance the SO2 absorption. Under vertical condition, the desulfurization efficiency could be promoted approximate 6% after installing a distribution ring. The inclined condition resulting from the ship swinging could lead to the uneven distribution of droplets and an obvious decrease (8.7%) of desulfurization efficiency, whereas the desulfurization performance of the scrubber could be ensured with a distribution ring installed even under an inclined condition. Finally, a spray scrubber design scheme has been developed and successfully applied in the exhaust gas cleaning system (EGCS) of a container ship. Test result shows the outlet average value of SO2/CO2 can be reduced to 3.55. Meanwhile, the consistency of test data and calculation result indicates the applicability of the numerical model established for the simulation and optimization of the scrubber in industrial applications also.Implications: EGCS is an effective method to reduce SO2 emission of marine industry. However, different from a land desulfurization tower, the application of a spray scrubber in EGCS faces more problems due to the different application scenarios and complex sea conditions (inclined condition resulting from ships swinging and so on) during sailing. In this work, a numerical model capable of investigating physical and chemical phenomena in the scrubber simultaneously is established, which can produce a great amount of data for the operation instruction of EGCS and the design and optimization of the marine spray scrubber. The distribution ring is introduced in the marine spray scrubber to intensify the SO2 absorption and enhance the desulfurization performance of the scrubber under different working conditions.
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Affiliation(s)
- Wenjun Li
- State Key Laboratory of Clean Energy Utilization, State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou, People's Republic of China
| | - Yongxin Zhang
- State Key Laboratory of Clean Energy Utilization, State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou, People's Republic of China
| | - Zhongyang Zhao
- State Key Laboratory of Clean Energy Utilization, State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou, People's Republic of China
| | - Chang Liu
- State Key Laboratory of Clean Energy Utilization, State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou, People's Republic of China
| | - Yifan Wang
- State Key Laboratory of Clean Energy Utilization, State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou, People's Republic of China
| | - Mingqiang Shen
- Zhejiang Energy Marine Environmental Technology Co., Ltd, Hangzhou, People's Republic of China
| | - Haobo Dai
- Zhejiang Tiandi Environmental Protection Engineering Co., Ltd, Hangzhou, People's Republic of China
| | - Yang Yang
- State Key Laboratory of Clean Energy Utilization, State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou, People's Republic of China
| | - Chenghang Zheng
- State Key Laboratory of Clean Energy Utilization, State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou, People's Republic of China
| | - Xiang Gao
- State Key Laboratory of Clean Energy Utilization, State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control, Zhejiang University, Hangzhou, People's Republic of China
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Process intensification of SO2/CO2 co-capture using microscale vortex flow contactor: Mass transfer behaviors, performance modeling, and flow simulation. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Valera VY, Codolo MC, Martins TD. Artificial neural network for prediction of SO2 removal and volumetric mass transfer coefficient in spray tower. Chem Eng Res Des 2021. [DOI: 10.1016/j.cherd.2021.03.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lamas Galdo MI, Rodriguez García JD, Rebollido Lorenzo JM. Numerical Model to Analyze the Physicochemical Mechanisms Involved in CO 2 Absorption by an Aqueous Ammonia Droplet. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:4119. [PMID: 33924689 PMCID: PMC8069808 DOI: 10.3390/ijerph18084119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 04/07/2021] [Accepted: 04/10/2021] [Indexed: 11/16/2022]
Abstract
CO2 is the main anthropogenic greenhouse gas and its reduction plays a decisive role in reducing global climate change. As a CO2 elimination method, the present work is based on chemical absorption using aqueous ammonia as solvent. A CFD (computational fluid dynamics) model was developed to study CO2 capture in a single droplet. The objective was to identify the main mechanisms responsible for CO2 absorption, such as diffusion, solubility, convection, chemical dissociation, and evaporation. The proposed CFD model takes into consideration the fluid motion inside and outside the droplet. It was found that diffusion prevails over convection, especially for small droplets. Chemical reactions increase the absorption by up to 472.7% in comparison with physical absorption alone, and evaporation reduces the absorption up to 41.9% for the parameters studied in the present work.
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Affiliation(s)
- M. I. Lamas Galdo
- Escola Politécnica Superior, Universidade da Coruña, 15403 Ferrol, Spain
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Zhu J, Zhao P, Zhang Q, Yang S, Yan Q. Modeling and experimental studies on chemical absorption of sulphur dioxide with ethylenediamine-phosphoric acid solution in a θ-ring packed tower for purification of flue gas. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.117764] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Advanced and Intensified Seawater Flue Gas Desulfurization Processes: Recent Developments and Improvements. ENERGIES 2020. [DOI: 10.3390/en13225917] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Seawater flue gas desulfurization (SWFGD) is considered to be a viable solution for coastal and naval applications; however, this process has several drawbacks, including its corrosive absorbent; low vapor loading capacity since the solubility of sulfur oxides (SOx) in seawater is lower than that of limestone used in conventional methods; high seawater flowrate; and large equipment size. This has prompted process industries to search for possible advanced and intensified configurations to enhance the performance of SWFGD processes to attain a higher vapor loading capacity, lower seawater flowrate, and smaller equipment size. This paper presents an overview of new developments as well as advanced and intensified configurations of SWFGD processes via process modifications such as modification and optimization of operating conditions, improvement of spray and vapor distributors, adding internal columns, using square or rectangular shape, using a pre-scrubber, multiple scrubber feed; process integration such as combined treatment of SOx and other gases, and waste heat recovery; and process intensification such as the use of electrified sprays, swirling gas flow, and rotating packed beds. A summary of the industrial applications, engineering issues, environmental impacts, challenges, and perspectives on the research and development of advanced and intensified SWFGD processes is presented.
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Wet flue gas desulfurization using micro vortex flow scrubber: Characteristics, modeling and simulation. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116915] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wang H, Tang M, Wang D, Liu Y, Zhang Y, Hu B, Wang R, Zhang S. Flow characteristics of blade unit of a tridimensional rotational flow sieve tray under concurrent gas–liquid flow. AIChE J 2020. [DOI: 10.1002/aic.16454] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hongkai Wang
- School of Chemical Engineering and TechnologyHebei University of Technology Tianjin China
| | - Meng Tang
- School of Chemical Engineering and TechnologyHebei University of Technology Tianjin China
- School of Mechanical EngineeringHebei University of Technology Tianjin China
| | - Dewu Wang
- School of Chemical Engineering and TechnologyHebei University of Technology Tianjin China
| | - Yan Liu
- School of Chemical Engineering and TechnologyHebei University of Technology Tianjin China
| | - Yishuo Zhang
- School of Chemical Engineering and TechnologyHebei University of Technology Tianjin China
| | - Baisong Hu
- School of Chemical Engineering and TechnologyHebei University of Technology Tianjin China
| | - Ruojin Wang
- School of Chemical Engineering and TechnologyHebei University of Technology Tianjin China
| | - Shaofeng Zhang
- School of Chemical Engineering and TechnologyHebei University of Technology Tianjin China
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Continuous Process for Carbon Dioxide Capture Using Lysine and Tetrabutyl Phosphonium Lysinate Aqueous Mixtures in a Packed Tower. Catalysts 2020. [DOI: 10.3390/catal10040426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The CO2 absorption process using aqueous solutions of lysine (Lys), the ionic liquid (IL) tetrabutyl phosphonium lysinate ([TBP][Lys]) and their mixtures was studied by means of a packed tower. The performance of these systems was evaluated through the volumetric overall mass transfer coefficient ( K G a V ) , conducting experiments under diverse conditions such as inlet CO2 concentration from 10 to 40 vol.%, gas and absorbent flow rates from 100 to 200 mL/min and from 3 to 5 mL/min, respectively, absorbent concentration from 5 to 15 wt.% and temperature from 15 to 40 °C. The obtained results for all the previous experimental conditions were better for the IL/Lys mixture than for the isolated components; the best performance was shown by the experiment varying the absorbent concentration, where the increasing K G a V was benefited by the IL/Lys synergistic effect.
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Wang D, Zhao B, Su Y. Flow Pattern and Pressure Drop for Small Long‐Cylinder Cyclones Operating at High Flow Rates. Chem Eng Technol 2019. [DOI: 10.1002/ceat.201800511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dongshen Wang
- University of Shanghai for Science and TechnologySchool of Energy and Power Engineering and Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering 516 Jungong Road 200093 Shanghai China
| | - Bingtao Zhao
- University of Shanghai for Science and TechnologySchool of Energy and Power Engineering and Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering 516 Jungong Road 200093 Shanghai China
| | - Yaxin Su
- Donghua UniversitySchool of Environmental Science and Engineering 2999 North Renmin Road 201620 Shanghai China
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Study on kinetics of flow characteristics in hot air drying of pineapple. Food Sci Biotechnol 2018; 27:1047-1055. [PMID: 30263834 DOI: 10.1007/s10068-018-0357-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 12/25/2017] [Accepted: 03/14/2018] [Indexed: 10/17/2022] Open
Abstract
The aim was to evaluate the kinetic parameters, total color differences (∆E*) and browning index differences (∆BI) of air flow pineapple drying. The experiments were performed on air temperatures at 60 and 70 °C, and air velocities at 1.5 and 2.0 m/s. The kinetic parameter (k) increased when air temperature was increased for all air velocity. The effective diffusivity coefficient (Deff) increased as high as the temperature of the heating medium. The variation of Deff of swirling flow was ranging from 6.72 × 10-9 to 10.23 × 10-9 m2/s, while the variation of Deff of non-swirling flow was ranging from 6.40 × 10-9 to 9.42 × 10-9 m2/s. The drying time of swirling flow was shorter than non-swirling flow in each drying condition. Moreover, the ∆E* and ∆BI of pineapple in swirling flow were lower than that obtained from non-swirling flow. Therefore, the convective drying using swirling flow can be minimized for drying time and color deterioration.
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Constraint handling optimal PI control of open-loop unstable process: Analytical approach. KOREAN J CHEM ENG 2017. [DOI: 10.1007/s11814-017-0219-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Codolo MC, Bizzo WA. Mass Transfer and Liquid-Film Formation in a Spray Tower for SO2
Removal in Sodium Hydroxide Solution. Chem Eng Technol 2016. [DOI: 10.1002/ceat.201500389] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Zhu J, Liu Z, Bai J, Yang Y, Peng Q, Ye S, Chen M. Modeling and experimental studies of ammonia absorption in a spray tower. KOREAN J CHEM ENG 2015. [DOI: 10.1007/s11814-015-0056-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Experimental Assessment of Water Sprays Utilization for Controlling Hydrogen Sulfide Releases in Confined Space. JOURNAL OF NANOTECHNOLOGY 2015. [DOI: 10.1155/2015/958252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This paper reported the utilization of water spray for controlling H2S release in a confined space, which is especially important in industry. A typical spray tower was modified to simulate the confined space for people's enterable routine operation (e.g., pump room), in which the dilution capacity of water sprays can also be evaluated. This work consists of two parts: the first part focuses on the influences of different operating conditions on chemical dilution capacities of water sprays in mechanisms; the second one is comparison between two nozzle configurations for evaluating their feasibilities of practical application. Water sprays express eligible performance for H2S release control even though their dilution capacity was weakened at high gaseous concentrations and rates of releases. The presence of Na2CO3can significantly improve absorption effectiveness of H2S in water and the optimal Na2CO3additive was found to be 1.0 g·L−1in this test. Compared with Na2CO3, adjusting water flow rate may be an effective strategy in enhancing dilution capacity of water sprays due to the fact that larger flow rate led to both less dilution time (TD) and dilution concentration (CD). Furthermore, multinozzle configuration is more efficient than single-nozzle configuration under the same water consumption.
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Li W, Zhao X, Liu B, Tang Z. Mass Transfer Coefficients for CO2 Absorption into Aqueous Ammonia Using Structured Packing. Ind Eng Chem Res 2014. [DOI: 10.1021/ie403097h] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenbin Li
- State Key Laboratory for
Chemical Engineering and School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xingjian Zhao
- State Key Laboratory for
Chemical Engineering and School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Botan Liu
- State Key Laboratory for
Chemical Engineering and School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhongli Tang
- State Key Laboratory for
Chemical Engineering and School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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Thu HCT, Lee M. Analytical design of proportional-integral controllers for the optimal control of first-order processes with operational constraints. KOREAN J CHEM ENG 2013. [DOI: 10.1007/s11814-013-0153-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Codolo M, Bizzo W, Bertazzoli R. Performance of a UV-assisted Hydrogen-peroxide-fed Spray Tower for Sulfur Dioxide Abatement. Chem Eng Technol 2013. [DOI: 10.1002/ceat.201200699] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Li L, Zhao B. Numerical Simulation of Gas and Liquid Flow within a Vortex Spray Tower. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.egypro.2012.01.171] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tanda T, Shirai K, Matsumura Y, Kitahara H. New Correlation for Mass Transfer Characteristics of Spray Column. Ind Eng Chem Res 2011. [DOI: 10.1021/ie200989k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - Hiroyuki Kitahara
- Total System Laboratory, 3-23-6 Kinunodai, Tsukuba-Mirai, Ibaraki 300-2436, Japan
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Zeng Q, Guo Y, Niu Z, Lin W. Mass Transfer Coefficients for CO2 Absorption into Aqueous Ammonia Solution Using a Packed Column. Ind Eng Chem Res 2011. [DOI: 10.1021/ie101821b] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qing Zeng
- Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Yincheng Guo
- Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Zhenqi Niu
- Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Wenyi Lin
- Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
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Yincheng G, Zhenqi N, Wenyi L. Comparison of removal efficiencies of carbon dioxide between aqueous ammonia and NaOH solution in a fine spray column. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.egypro.2011.01.082] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Turpin A, Couvert A, Laplanche A, Paillier A. Mass transfer and deodorization efficiency in a countercurrent spray tower for low superficial gas velocities. CAN J CHEM ENG 2009. [DOI: 10.1002/cjce.20084] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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