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Characterizing the catalyst fluidization with field synergy to improve the amine absorption for CO2 capture

Chinese Journal of Chemical engineering 2019年第7期27卷 1608-1617页

作者： Yunsong Yu Chen Zhang Zaoxiao Zhang Geoff Wang School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Chemical Engineering The University of QueenslandSt LuciaQLD 4072Australia

There are great interests to capture the CO2 to control the greenhouse gas *** absorption of CO2 is being taken as an effective way to capture CO2 in ***,the amine absorption of CO2 is cost-ineffective due to great energy consumption and solution *** order to reduce the capture cost,catalyst fluidization is proposed here to intensify the mass transfer and heat *** fluidization with field synergy and DFT model is developed by incorporating the effects of catalyst reaction kinetics,drag force and multi-field into the mass transfer,heat transfer,fluid flow and catalyst *** with an improved distributor are performed well to validate the *** reaction kinetics is determined by the DFT simulation and *** mass transfer coefficient in the fluidized reactor is identified as 17%higher than the conventional packed *** the field synergy of catalyst fluidization,the energy consumption for CO2 desorption is reduced by 9%.Stepwise operation and inclination reactor are used to improve catalyst fluidization process.

关键词： CO2 capture Catalyst fluidization Mass transfer DFT Energy consumption Field synergy

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Corrigendum to “Numerical simulation of an externally heated fixed bed reactor for coal pyrolysis based on porous media” [Chem. Eng. Res. Des. 211 (2024) 137–151]

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Chemical engineering Research and Design 2025年 218卷 454-454页

作者： Haoyue Li Yuanpei Luo Fei Dai Jun Sui Hongguang Jin Laboratory of Distributed Energy Systems and Renewable Energy Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

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Remote open-path laser-induced breakdown spectroscopy for the analysis of manganese in steel samples at high temperature

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Plasma Science and Technology 2019年第3期21卷 52-59页

作者： Minchao CUI Yoshihiro DEGUCHI Zhenzhen WANG Seiya TANAKA Min-Gyu JEON Yuki FUJITA Shengdun ZHAO School of Mechanical Engineering Xi'an Jiaotong University Graduate School of Advanced Technology and Science University of Tokushima State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Division of Mechanical Engineering Korea Maritime and Ocean University School of Mechanical Engineering Xi’an Jiaotong University

A remote open-path laser-induced breakdown spectroscopy(LIBS) system was designed and studied in the present work for the purpose of combining the LIBS technique with the steel production line. In this system, the relatively simple configuration and optics were employed to measure the steel samples at a remote distance and a hot sample temperature. The system has obtained a robustness for the deviation of the sample position because of the open-path and alloptical structure. The measurement was carried out at different sample temperatures by placing the samples in a muffle furnace with a window in the front door. The results show that the intensity of the spectral lines increased as the sample temperature increased. The influence of the sample temperature on the quantitative analysis of manganese in the steel samples was investigated by measuring ten standard steel samples at different temperatures. Three samples were selected as the test sample for the simulation measurement. The results show that, at the sample temperature of 500 ℃, the average relative error of prediction is 3.1% and the average relative standard deviation is 7.7%, respectively.

关键词： remote open-path LIBS steel manganese sample temperature quantitative analysis

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Performance of different flocculants for harvesting Chlorella vulgaris by dissolved air flotation and sedimentation

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Bioresource Technology 2025年 433卷 132743页

作者： Wei, X. Rao, N.R.H. Tyagi, S. Thielemans, W. Cao, W. Guo, L.J. Muylaert, K. State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi Xi'an710049 China Laboratory of Aquatic Biology KU Leuven Campus Kulak Kortrijk Kortrijk8500 Belgium Sustainable Materials Laboratory Department of Chemical Engineering KU Leuven Campus Kulak Kortrijk Kortrijk8500 Belgium

This study systematically evaluated the performance of dissolved air flotation and sedimentation for harvesting Chlorella vulgaris using eight different flocculants. Significant variation was observed in both the maximum harvesting efficiency and the minimum effective flocculant dose across different flocculant-process combinations. Among the tested flocculants, pyridinium modified cellulose nanocrystals achieved the highest harvesting efficiency of 99 % in both dissolved air flotation and sedimentation, while chitosan required the lowest minimum flocculant dose (∼2 mg·g−1) to induce flocculation. The impact of floc size formed during the flocculation step on harvesting performance was also investigated, revealing that large flocs significantly favored sedimentation-based microalgae harvesting. A preliminary cost analysis highlighted the importance of integrating economic considerations into the selection of both flocculant and harvesting method. The findings suggest that optimal flocculant and process selection should be based not only on harvesting efficiency but also on cost-effectiveness for microalgal biomass recovery. © 2025 Elsevier Ltd

关键词： Cost benefit analysis

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Degradation of polyethylene terephthalate (PET) and polypropylene (PP) plastics in seawater

DeCarbon

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DeCarbon 2023年 1卷

作者： Meixin Guan Hui Jin Wenwen Wei Mi Yan State Key Laboratory of Multiphase Flow in Power Engineering (SKLMF) Xi'an Jiaotong University 28 Xianning West Road Xi'an 710049 Shaanxi China State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 Zhejiang China

The world's marine litter consists mainly of plastic, and 99% of it does not float on the surface of the sea but on the seabed. The plastic carbon footprint necessarily includes the extraction or manufacture of raw materials, the conversion process, the distribution of products, the consumption of specific types of products and the disposal of the final product, as all these stages release carbon into the atmosphere. This work, inspired by marine microplastics and investigates how plastic waste is degraded and transformed in high-pressure, low-temperature seawater, this paper investigates the corrosion of polyethylene terephthalate (PET) and polypropylene (PP) plastics in seawater at high-pressure, using artificial seawater temperatures to simulate ocean temperatures of approximately 4 °C and time settings of 1 day–7 days. The results show that increasing the time enhances the degradation of the plastics and that changing the pressure has little effect on the degradation effect. Understanding its degradation in seawater can help us to better treat plastic waste and thus reduce the carbon footprint of the disposal process.

关键词： PET PP High-pressure seawater Degradation

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Encapsulation of Co/Co3o4 Hetero-Nanoparticles within the Inner Tips of N-Doped Carbon Nanotubes: engineering Mott-Schottky Nanoreactors for Efficient Bifunctional Oxygen Electrocalysis Toward Flexible Zinc-Air Batteries

SSRN

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SSRN 2022年

作者： Zhang, Binbin Lu, Tingyu Ren, Yiping Huang, Longzhen Pang, Huan Zhao, Qun Tian, Shu Yang, Jun Xu, Lin Tang, Yawen Tian, Xinlong School of Chemistry and Materials Science Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Nanjing Normal University Nanjing210023 China School of Chemistry and Chemical Engineering Yangzhou University Yangzhou225009 China College of Chemistry and Chemical Engineering Nantong University Nantong226019 China Nanjing IPE Institute of Green Manufacturing Industry Nanjing211100 China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine Chemistry School of Chemical Engineering and Technology Hainan University Haikou570228 China

We demonstrate a typical Mott-Schottky electrocatalyst by ingeniously encasing Co/Co3O4 hetero-nanoparticles within the inner tips of N-doped carbon nanotubes (abbreviated as Co/Co3O4@N-CNTs hereafter) through a facile and scalable hydrogel-bridged pyrolysis strategy. Experimental and theoretical findings collectively manifest that the spontaneous charge redistribution at the Co/Co3O4 heterointerfaces is essential to promote the charge transfer capability, lower down the reaction barriers for oxygen electrocatalysis, and ultimately boost the intrinsic activities. Accordingly, the well-designed Co/Co3O4@N-CNTs exhibit admirable ORR and OER activities and long-term robustness in KOH medium, exceeding the commercial Pt/C and RuO2 benchmarks, respectively. Furthermore, the Co/Co3O4@N-CNTs-assembled flexible all-solid-state zinc-air battery displays a high power density, remarkable rate capability, excellent rechargeablity and outstanding mechanical flexibility even under severe deformations, predicting the great potentials in diverse next-generation wearable electronic devices. The rationale of the construction of Mott-Schottky heterojunctions may provide an innovative and instructive avenue to design diversified energy nanomaterials. © 2022, The Authors. All rights reserved.

关键词： Doping (additives)

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Full-core normal and preliminary transient analysis for SiC-based rod designs 14

Full-core normal and preliminary transient analysis for SiC-...

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14th International Nuclear Fuel Cycle Conference, GLOBAL 2019 and Light Water Reactor Fuel Performance Conference, TOP FUEL 2019

作者： He, Yanan Deng, Yangbin Wu, Yingwei Shirvan, Koroush Department of Nuclear Science and Engineering MIT CambridgeMA02139 United States State Key Laboratory of Multiphase Flow in Power Engineering Department of Nuclear Science and Technology Xi'an Jiaotong University Xi'an City710049 China College of Physics and Energy Shenzhen University Shenzhen518060 China

When introducing a new fuel concept in traditional light water reactors (LWRs), analyzing its performance under a variety of power histories while attempting to simulate its stress state as realistic as possible is desired. By having access to such capability, the fuel developer can assess the safety characteristics of the new fuel concept and optimize its design performance. SiC/SiC Ceramic Matrix Composite (CMC) with chemically vapor deposited (CVD) SiC, is an accident tolerant fuel (ATF) concept owing to its high mechanical strength and remarkably enhanced oxidation-resistance. The modeling of SiC cladding requires capability to simulate multilayers and capture the nonlinear response of SiC material under neutron radiation. In addition, considering its probabilistic failure characteristics, efficient running fuel performance tools are required to assess its initial safety performance and optimize its design. In this work, we added a multi-layer deformation model in FRAPCON-4.0 and FRAPTRAN-2.0, with the primary motivation to analyze the performance of SiC cladding for UO2, annular UO2 and U3Si2 fuels from a full core point-of-view. We then performed reactivity-initiated accident (RIA) and loss-of-coolant accident (LOCA) for the limiting rod. During normal conditions, the failure risk of SiC cladding is mainly determined by pellet-cladding mechanical interaction (PCMI) and U3Si2 is a more promising fuel compared to UO2. While promising performance was simulated during LOCA for all fuels, during RIA, U3Si2 performance was found to be likely more limiting compared to UO2. Results show that the full core simulation methods developed for this work are robust and computationally efficient and can be adopted for other ATF design analysis. Copyright © GLOBAL 2019 - International Nuclear Fuel Cycle Conference and TOP FUEL 2019 - Light Water Reactor Fuel Performance *** rights reserved.

关键词： Silicon carbide

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PRELIMINARY NEUTRONIC/THERMAL-HYDRAULIC AND SAFETY ASSESSMENT OF PRESSURIZED WATER REACTOR LOADED WITH FULLY CERAMIC MICROENCAPSULATED FUEL

PRELIMINARY NEUTRONIC/THERMAL-HYDRAULIC AND SAFETY ASSESSMEN...

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2020 International Topical Meeting on Advances in Thermal Hydraulics, ATH 2020

作者： Wu, Di Gui, Minyang Zhang, Dalin Wang, Chenglong Wu, Yingwei Su, G.H. Qiu, Suizheng Tian, Wenxi Yang, Hongfa Peng, Jingyang Shanxi Key Laboratory of Advanced Nuclear Energy and Technology School of Nuclear Science and Technology Xi'an Jiaotong University State Key Laboratory of Multiphase Flow in Power Engineering Xi'an710049 China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu610213 China Nuclear and Radiation Safety Center Ministry of Ecology and Environment of the People's Republic of China Beijing100082 China

ISBN: (纸本)9780894487774

As one of the accident tolerant fuels (ATFs), fully ceramic microencapsulated (FCM) fuel shows superior safety performance in accidents, which has the characteristics of high melting point, excellent heat transfer ability and strong nuclear proliferation resistance. Based on the neutronic analysis of Chinese advanced three loop pressurized water reactor (PWR), the assemblies and cores of FCM-SiC and UO2-Zr were designed, power distributions and cycle lengths were obtained, and the power was adjusted to ensure the annual refueling requirements. By using system analysis code, station blackout (SBO) accident in FCM-SiC and UO2-Zr was analyzed, where the steam-driven auxiliary feedwater (AFW) in secondary loop failed to be supplied in time. Assuming that the AFW system couldn't be put into operation immediately after accident, the critical time could be calculated, that is to say, fuel centerline temperature (FCT) and peak cladding temperature (PCT) wouldn't exceed corresponding limits during accident once the AFW was provided within the critical time. It is found that the critical time of FCM-SiC is 9000s and higher than that of UO2-Zr (7000s), which shows the advantages of ATFs. This work could provide reference for the optimized design of the reactor safety system in the future. © ATH 2020 - International Topical Meeting on Advances in Thermal *** rights reserved.

关键词： Silicon carbide

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Lattice Boltzmann simulation on adsorption of sulfuric acid vapor by ash particles

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Fuel 2025年 401卷

作者： Ren, Jiyun Jiang, Chongjun Hu, Fangfang Wang, Hui Shao, Yunhao Liu, Xinyu Wu, Zhang Pan, Feng Yang, Qidong Deng, Lei Che, Defu State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'an Jiaotong University Xi'an710049 China China University of Petroleum-Beijing Beijing102249 China China Energy Engineering Group Shaanxi Electric Power Design Institute Co. Ltd. Xi'an710054 China West Pipeline Company of PipeChina Urumchi830000 China

In the low-low temperature flue gas systems, sulfuric acid vapor is adsorbed onto the ash particles. Based on the SEM images of ash particles, the OpenCV library in C++ is employed for image binarization, which aids in developing a lattice Boltzmann method (LBM) that incorporates convection–diffusion and surface adsorption. The adsorption process of sulfuric acid vapor by ash particles with different chemical compositions is simulated and evaluated. The results indicate that sulfuric acid vapor exits through the ash particles at 5.1 μs, and stabilizes after 51 μs, reaching a maximum velocity of 0.29 m s–1. Without chemical additives, the ash particles undergo a rapid adsorption phase within the initial 1000 μs, achieving nearly 78.92 % saturation with an average adsorption amount of 1.31 mg g–1. At 10200 μs, most ash particles approach saturation adsorption, ranging from 1.6 to 1.8 mg g–1. For all ash particles with added chemical components, adsorption preferentially occurs on the left side at both 5.1 μs and 51 μs. At 510 μs, nearly half of the ash particles with 7.1 % K2CO3 reach adsorption saturation, while approximately one-half of those with 9.2 % Na2CO3 achieve the same. Following the addition of 18.4 % Na2CO3, smaller ash particles approach saturation at a faster adsorption rate compared to those with 14.2 % K2CO3, with less than half of the region reaching an adsorption amount of 3.5mg g−1. At 1000 μs, the ash particles containing 9.2 % and 18.4 % Na2CO3, along with 7.1 % and 14.2 % K2CO3, achieve saturation adsorption amounts of 96.14, 96.73 %, 95.45 %, and 93.87 %, respectively. The adsorption rate is high during the first 1000 μs but significantly declines after 1500 μs, nearing saturation by 3000 μs. The addition of 18.4 % Na2CO3 results in porosity of up to 73.65 % and fewer large particles, allowing for faster mainstream velocity and mass transfer within the pores, thereby facilitating the vapor adsorption. By integrating the binarization of SEM image

关键词： Kinetic theory of gases

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Multiple defects construction of Co loading on Ni foam to activate water for promoting catalytic ozonation of dichloromethane

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Journal of Hazardous Materials 2025年 495卷 138816页

作者： Li, Yongtao Luan, Chujun Lin, Fawei Zhu, Xueyan Yan, Beibei Cheng, Zhanjun Chen, Guanyi He, Chi School of Environmental Science and Engineering Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization Tianjin300072 China School of Mechanical Engineering Tianjin University of Commerce Tianjin300134 China National Engineering Laboratory for VOCs Pollution Control Material & Technology University of Chinese Academy of Sciences Beijing101408 China State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'an Jiaotong University Xi'an710049 China

Catalytic ozonation of chlorinated volatile organic compounds (Cl-VOCs) still faces with obstacles of water poisoning and byproducts formation. This work successfully synthesizes a Co-based monolithic catalyst with multiple defects construction that could activate water to promote dichloromethane (DCM) conversion and mineralization by catalytic ozonation at 120 °C. CO(NH2)2 and NH4F firstly create Ni defects to provide more adhesion sites, while they further contributed to crystallization and orientated growth of CoOx with a morphology of crowded nanoneedles, respectively, as well as etching Co defects and oxygen vacancies. Co-NUF-6 exhibited a DCM conversion of up to 88 % at a O3/DCM of 10.0, and 3 vol% water elevated it to 98 % with approximately three times reduction of polychlorinated byproducts. CoOx with abundant defects exhibited excellent water-activating effect to generate abundant O2− (superoxide) and O22− (peroxide), which replenished lattice oxygen and facilitated the production of more active hydroxyl groups from O3 hydroxylation, contributing to better DCM conversion and mineralization. This work transits low-temperature water poisoning to water activating and eliminated toxic polychlorinated byproducts by developing the monolithic catalyst with multiple defects for efficient elimination of DCM, which has application potential towards practical waste gas purification and provides guidance for future water-activating catalyst design. © 2025 Elsevier B.V.

关键词： Gas fuel purification

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