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Reconstruction of Cu–ZnO catalyst by organic acid and deactivation mechanism in liquid-phase hydrogenation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1311-1319 doi: 10.1007/s11705-022-2281-9

Abstract: active site Cu+, while the latter two forms of ZnO took the main responsibility for the deactivationmethod resulted in a new Cu–ZnO catalyst with more Cu+ and less ZnO species that leads to deactivationFurthermore, the deactivation mechanism of Cu–ZnO catalysts in liquid-phase diester hydrogenation incatalysts via transesterification catalyzed by weakly interacted ZnO and isolated ZnO leads to the deactivation

Keywords： liquid phase     hydrogenation     Cu–ZnO     deactivation mechanism     1     4-butanediol     diester    

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Deactivation and regeneration of TS-1/SiO

Hainan SHI, Yaquan WANG, Guoqiang WU, Wenping FENG, Yi Lin, Teng ZHANG, Xing JIN, Shuhai WANG, Xiaoxue WU, Pengxu YAO

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2,   Pages 202-209 doi: 10.1007/s11705-013-1328-3

Abstract: The major reason of the catalyst deactivation was the blockage of the channels of the catalyst by bulky

Keywords： TS-1/SiO2     epoxidation of propylene     fixed-bed reactor     deactivation     regeneration    

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Catalysis and deactivation of montmorillonite K10 in the aryl O -glycosylation of glycosyl trichloroacetoimidates

Xiaoliu LI, Xinhao YAN, Zhiwei LI, Hua CHEN, Pingzhu ZHANG,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 342-347 doi: 10.1007/s11705-009-0279-1

Abstract: trichloroacetamide molecule deposits on the MK10, which blocks and poisons the active sites, resulting in the deactivation

Keywords： photoelectron spectroscopy     adsorption-desorption     glycosylation     deactivated     diffraction    

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Chemical deactivation of V

Xiaodong WU, Wenchao YU, Zhichun SI, Duan WENG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3,   Pages 420-427 doi: 10.1007/s11783-013-0489-0

Abstract: The deactivation effects of poisoning agents follow the sequence of KCl>KOH>>NH Cl.The more severe deactivation of the KCl-treated catalyst can be mainly ascribed to the higher amount

Keywords： V2O5-WO3/TiO2     potassium chloride     poisoning     reducibility     acid sites    

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Effective regeneration of thermally deactivated commercial V-W-Ti catalysts

Xuesong SHANG, Jianrong LI, Xiaowei YU, Jinsheng CHEN, Chi HE

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1,   Pages 38-46 doi: 10.1007/s11705-011-1167-z

Abstract: An effective method for the regeneration of thermally deactivated commercial monolith SCR catalysts was investigated. Two types of regenerated solutions, namely NH Cl (1 mol/L) and dilute H SO (0.5 mol/L), were employed to treat the used catalyst. The effects of temperature and the regeneration process on the structural and textural properties of the catalysts were determined by X-ray diffraction, scanning electron microscopy, N adsorption/desorption, elemental analysis and Fourier transform infrared spectroscopy. The results suggest that the anatase phase of the used catalyst is maintained after exposure to high temperatures. Some of the catalytic activity was restored after regeneration. The catalyst regenerated by aqueous NH Cl had a higher activity than that of the catalyst treated by dilute H SO . The main reason is that the NH generated from the decomposition of NH Cl at high temperatures can be adsorbed onto the catalyst which promotes the reaction. The aggregated V O were partially re-dispersed during the regeneration process, and the intrinsic oxidation of ammonia with high concentrations of O is a factor that suppresses the catalytic activity.

Keywords： V2O5-WO3/TiO2 catalysts     thermal deactivation     regeneration    

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Influence evaluation of loading conditions during pressurized thermal shock transients based on thermal-hydraulics

Jinya KATSUYAMA, Shumpei UNO, Tadashi WATANABE, Yinsheng LI

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4,   Pages 563-570 doi: 10.1007/s11465-018-0487-9

Abstract:

The thermal hydraulic (TH) behavior of coo-lant water is a key factor in the structural integrityassessments on reactor pressure vessels (RPVs) of pressurized water reactors (PWRs) under pressurized thermalanalysis with different operator action times, we also performed structural analyses for evaluating thermal-stress

Keywords： structural integrity     reactor pressure vessel     pressurized thermal shock     thermal hydraulic analysis     pressurized    

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Kinetic model for hydroisomerization reaction of C-aromatics

XU Ouguan, SU Hongye, JIN Xiaoming, CHU Jian

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 1,   Pages 10-16 doi: 10.1007/s11705-008-0015-2

Abstract: An empirical catalyst deactivation function is incorporated into the model accounting for the loss in

Keywords： ordinary differential     Runge-Kutta     catalyst deactivation     C-paraffins     optimization    

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Assessment indices for uniform and non-uniform thermal environments

ZHANG Yufeng, SUN Shufeng, ZHAO Rongyi

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 129-133 doi: 10.1007/s11708-008-0029-y

Abstract: Different assessment indices for thermal environments were compared and selected for proper assessmentof indoor thermal environments. 30 subjects reported their overall thermal sensation, thermal comfort, and thermal acceptability in uniform and non-uniform conditions.However, overall thermal sensation differs from the other two indices and cannot be used as a proper

Keywords： thermal sensation     proper assessment     relationship     equivalent     thermal acceptability    

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Liquid metal thermal hydraulics R&D at European scale: achievements and prospects

Frontiers in Energy 2021, Volume 15, Issue 4,   Pages 842-853 doi: 10.1007/s11708-021-0743-2

Abstract: Commission in the past 20 years in the fields of liquid-metal heat transfer modeling, fuel assembly and core thermalhydraulics, pool and system thermal hydraulics, and establishment of best practice guidelines and verificationanalysis of the consequences of fuel assembly blockages on coolant flow and temperature, analysis of the thermalhydraulic effects in deformed fuel assemblies, extended validation of three-dimensional pool thermalhydraulic CFD models, and further development and validation of multi-scale system thermal hydraulic

Keywords： liquid metal     thermal hydraulics     Europe    

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Coupling evaluation for material removal and thermal control on precision milling machine tools

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 12-12 doi: 10.1007/s11465-021-0668-9

Abstract: material removal (MR) energy as useful energy consumption and ignored the useful energy consumed by thermalcontrol (TC) for maintaining internal thermal stability and machining accuracy.

Keywords： machine tools     cutting energy efficiency     thermal stability     machining accuracy     coupling evaluation    

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An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal

Qi WEI, Xiaohui ZHANG

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 507-516 doi: 10.1007/s11708-010-0017-x

Abstract: Thermal convection of viscoelastic fluids saturating a horizontal porous layer heated from below is analyzedusing a thermal nonequilibrium model to take account of the interphase heat transfer between the fluidThe effects of interphase heat transfer on the thermal convection of viscoelastic fluids in a porous

Keywords： thermal convection     porous media     viscoelastic fluid     thermal nonequilibrium model    

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ANN-exhaustive-listing method for optimization of multiple building shapes and envelope properties with maximum thermal

Yaolin LIN, Wei YANG

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 550-563 doi: 10.1007/s11708-019-0607-1

Abstract: awareness of sustainability, demands on optimized design of building shapes with a view to maximize its thermalCurrent research focuses more on building envelopes than shapes, and thermal comfort of building occupantshas not been considered in maximizing thermal performance in building shape optimization.performance as measured by both thermal load and comfort hour.that the building shape needs to be treated separately to achieve sufficient accuracy of prediction of thermal

Keywords： ANN (artificial neural network)     exhaustive-listing     building shape     optimization     thermal load     thermal comfort    

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Flow and thermal modeling of liquid metal in expanded microchannel heat sink

Frontiers in Energy   Pages 796-810 doi: 10.1007/s11708-023-0877-5

Abstract: The flow and thermal modeling of expanded microchannel heat sink (E-MCHS) were analyzed by both usingthe 3-dimensional (3D) numerical simulation and the 1-dimensional (1D) thermal resistance model.The fin efficiency of E-MCHS was derived to improve the accuracy of the 1D thermal resistance model.and the heat convection between the top surface of fins and the liquid metal could reduce the total thermalThe maximum thermal resistance reduction in the example of this paper reached 36.0%.

Keywords： liquid metal cooling     heat sink     expanded microchannel     flow and thermal modeling    

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Encapsulation of polyethylene glycol in cellulose-based porous capsules for latent heat storage and light-to-thermal

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8,   Pages 1038-1050 doi: 10.1007/s11705-022-2279-3

Abstract: graphene oxide, which were separately composited into the polyelectrolytes complex capsules to enhance thermalconductivity and light-to-thermal conversion efficiency.Moreover, studies involving light-to-thermal conversion determined that composite phase change materialsexhibited outstanding light-to-thermal conversion performance.management and renewable thermal energy storage.

Keywords： cellulose     polyelectrolytes     phase change materials     thermal energy storage     light-to-thermal conversion    

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Non-thermal plasma enhances performances of biochar in wastewater treatment and energy storage applications

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 4,   Pages 475-483 doi: 10.1007/s11705-021-2070-x

Abstract: In this study, non-thermal plasma was applied for biochar surface carving before being used in contaminantguidelines for enhancing the surface functionality and application performances of biochar using non-thermal-based

Keywords： non-thermal plasma     surface functionalization     biochar modification     wastewater treatment     supercapacitor    

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Title Author Date Type Operation

Reconstruction of Cu–ZnO catalyst by organic acid and deactivation mechanism in liquid-phase hydrogenation

Journal Article

Deactivation and regeneration of TS-1/SiO

Hainan SHI, Yaquan WANG, Guoqiang WU, Wenping FENG, Yi Lin, Teng ZHANG, Xing JIN, Shuhai WANG, Xiaoxue WU, Pengxu YAO

Journal Article

Catalysis and deactivation of montmorillonite K10 in the aryl O -glycosylation of glycosyl trichloroacetoimidates

Xiaoliu LI, Xinhao YAN, Zhiwei LI, Hua CHEN, Pingzhu ZHANG,

Journal Article

Chemical deactivation of V

Xiaodong WU, Wenchao YU, Zhichun SI, Duan WENG

Journal Article

Effective regeneration of thermally deactivated commercial V-W-Ti catalysts

Xuesong SHANG, Jianrong LI, Xiaowei YU, Jinsheng CHEN, Chi HE

Journal Article

Influence evaluation of loading conditions during pressurized thermal shock transients based on thermal-hydraulics

Jinya KATSUYAMA, Shumpei UNO, Tadashi WATANABE, Yinsheng LI

Journal Article

Kinetic model for hydroisomerization reaction of C-aromatics

XU Ouguan, SU Hongye, JIN Xiaoming, CHU Jian

Journal Article

Assessment indices for uniform and non-uniform thermal environments

ZHANG Yufeng, SUN Shufeng, ZHAO Rongyi

Journal Article

Liquid metal thermal hydraulics R&D at European scale: achievements and prospects

Journal Article

Coupling evaluation for material removal and thermal control on precision milling machine tools

Journal Article

An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal

Qi WEI, Xiaohui ZHANG

Journal Article

ANN-exhaustive-listing method for optimization of multiple building shapes and envelope properties with maximum thermal

Yaolin LIN, Wei YANG

Journal Article

Flow and thermal modeling of liquid metal in expanded microchannel heat sink

Journal Article

Encapsulation of polyethylene glycol in cellulose-based porous capsules for latent heat storage and light-to-thermal

Journal Article

Non-thermal plasma enhances performances of biochar in wastewater treatment and energy storage applications

Journal Article