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From plasma to plasmonics: toward sustainable and clean water production through membranes

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1809-1836 doi: 10.1007/s11705-023-2339-3

Abstract: The increasing demand for potable water is never-ending. Freshwater resources are scarce and stress is accumulating on other alternatives. Therefore, new technologies and novel optimization methods are developed for the existing processes. Membrane-based processes are among the most efficient methods for water treatment. Yet, membranes suffer from severe operational problems, namely fouling and temperature polarization. These effects can harm the membrane’s permeability, permeate recovery, and lifetime. To mitigate such effects, membranes can be treated through two techniques: plasma treatment (a surface modification technique), and treatment through the use of plasmonic materials (surface and bulk modification). This article showcases plasma- and plasmonic-based treatments in the context of water desalination/purification. It aims to offer a comprehensive review of the current developments in membrane-based water treatment technologies along with suggested directions to enhance its overall efficiency through careful selection of material and system design. Moreover, basic guidelines and strategies are outlined on the different membrane modification techniques to evaluate its prerequisites. Besides, we discuss the challenges and future developments about these membrane modification methods.

Keywords： water treatment     membrane-based process     plasma treatment     plasma polymerization     plasmonic     light-to-heatconversion    

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

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

Abstract: Phase change materials are potential candidates for the application of latent heat storage.conversion efficiency.cellulose-based composite phase change materials exhibited high thermal energy storage ability with the latent heatMoreover, studies involving light-to-thermal conversion determined that composite phase change materialsexhibited outstanding light-to-thermal conversion performance.

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

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Effect of Fe content on FeMn catalysts for light alkenes synthesis

ZHOU Jun, CHU Wei, ZHANG Hui, XU Huiyuan, ZHANG Tao

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 3,   Pages 315-318 doi: 10.1007/s11705-008-0050-z

Abstract: The effect of Fe content on FeMn/MgO catalysts for light alkenes synthesis through CO hydrogenation wasHigh activity was obtained over the catalyst with 9 wt-% Fe content, over which CO conversion and theWith the increase of Fe content, both the conversion and the selectivity were improved within a certain

Keywords： conventional co-impregnation     increase     conversion     loading     H-TPR    

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Facile synthesis and enhanced visible-light photocatalytic activity of Ti

Xiaojie Zhang,Lei Wang,Shuqing Chen,Yi Huang,Zhuonan Song,Miao Yu

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 3,   Pages 349-358 doi: 10.1007/s11705-015-1523-5

Abstract: directing agent, and inhibitor; the activity was evaluated using a probe reaction-photocatalytic CO conversionto methane under visible light irradiation with H as an electron donor and hydrogen source.

Keywords： Ti3+-doped TiO2     photocatalytic CO2 conversion     visible light irradiation    

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A space power system of free piston Stirling generator based on potassium heat pipe

Mingqiang LIN, Jian MOU, Chunyun CHI, Guotong HONG, Panhe GE, Gu HU

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 1-10 doi: 10.1007/s11708-019-0655-6

Abstract: The power system of a free piston Stirling generator (FPSG) based on potassium heat pipes has been developedBesides, the power system integrated with four FPSGs and potassium heat pipes was performed and the single

Keywords： free piston Stirling generator (FPSG)     potassium heat pipe     power system     energy conversion    

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Effect of temperature in the conversion of methanol to olefins (MTO) using an extruded SAPO-34 catalyst

Ignacio Jorge Castellanos-Beltran, Gnouyaro Palla Assima, Jean-Michel Lavoie

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2,   Pages 226-238 doi: 10.1007/s11705-018-1709-8

Abstract: At 300 °C, a low conversion was observed combined with catalyst deactivation, which was ascribed to oligomerization

Keywords： MTO     SAPO-34     temperature     extrusion     coke     light alkanes    

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Photocatalytic syngas synthesis from CO

Ling Tan, Kipkorir Peter, Jing Ren, Baoyang Du, Xiaojie Hao, Yufei Zhao, Yu-Fei Song

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1,   Pages 99-108 doi: 10.1007/s11705-020-1947-4

Abstract: The rational design of photocatalyst that can effectively reduce CO under visible light ( >400 nm),efficiency of LDH-based photocatalysts in the synthesis of syngas with a tunable ratio under visible light

Keywords： visible light catalysis     CO2 conversion     layered double hydroxide     rare earth elements    

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Hydrogel photocatalysts for efficient energy conversion and environmental treatment

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 577-595 doi: 10.1007/s11708-021-0756-x

Abstract: Moreover, current applications of hydrogel photocatalysts in energy conversion and environmental remediation

Keywords： hydrogel     photocatalysts     energy conversion     environmental treatment    

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Biological conversion pathways of sulfate reduction ammonium oxidation in anammox consortia

Zhen Bi, Deqing Wanyan, Xiang Li, Yong Huang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 3, doi: 10.1007/s11783-019-1217-1

Abstract: AOB and AnAOB are mainly responsible for ammonium conversion.Heterotrophic sulfate reduction mainly contributed to sulfate conversion.Results obtained differed largely for the conversion mole ratios (ammonium/sulfate), and even the intermediateThus, the hypothesis of biological conversion pathways of ammonium and sulfate in anammox consortia isdifferent biomass proportions to verify the SRAO phenomena and identify possible pathways behind substrate conversion

Keywords： Anammox bacteria     Autotrophic     Biological conversion     Sulfate reducing ammonium oxidation (SRAO)    

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Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 414-436 doi: 10.1007/s11708-017-0507-1

Abstract: In this paper, three important aspects for absorption heat pump for waste heat reuse are reviewed.In the first part, different absorption heat pump cycles are classified and introduced.Absorption heat pumps for heat amplification and absorption heat transformer for temperature upgradingIn the third part, the applications of the absorption heat pump and absorption heat transformer for wasteheat reuse in different industries are introduced.

Keywords： absorption     heat pump     heat transformer     waste heat     working pair    

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Photocatalysis: from solar light to hydrogen energy

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 565-567 doi: 10.1007/s11708-021-0784-6

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Sustainable conversion regenerated cellulose into cellulose oleate by sonochemistry

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8,   Pages 1096-1108 doi: 10.1007/s11705-023-2317-9

Abstract: Derivatization has great potential for the high-value utilization of cellulose by enhancing its processability and functionality. However, due to the low reactivity of natural cellulose, it remains challenging to rapidly prepare cellulose derivatives with high degrees of substitution. The “cavitation effect” of ultrasound can reduce the particle size and crystalline index of cellulose, which provides a possible method for preparing cellulose derivatives. Herein, a feasible method was proposed for efficiently converting regenerated cellulose to cellulose oleate with the assistance of ultrasonic treatment. By adjusting the reaction conditions including ultrasonic intensity, feeding ratios of oleic acid, reaction time, and reaction solvent, a series of cellulose oleates with degrees of substitution ranging from 0.37 to 1.71 were synthesized. Additionally, the effects of different reaction conditions on the chemical structures, crystalline structures, and thermal behaviors were investigated thoroughly. Cellulose oleates with degrees of substitution exceeding 1.23 exhibited amorphous structures and thermoplasticity with glass transition temperatures at 159.8 to 172.6 °C. This study presented a sustainable and practicable method for effectively derivatizing cellulose.

Keywords： regenerated cellulose     cellulose oleate     sonochemistry     degree of substitution     thermoplasticity    

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Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 184-192 doi: 10.1007/s11708-012-0185-y

Abstract: Frequency regulation in a generation mix having large wind power penetration is a critical issue, as wind units isolate from the grid during disturbances with advanced power electronics controllers and reduce equivalent system inertia. Thus, it is important that wind turbines also contribute to system frequency control. This paper examines the dynamic contribution of doubly fed induction generator (DFIG)-based wind turbine in system frequency regulation. The modified inertial support scheme is proposed which helps the DFIG to provide the short term transient active power support to the grid during transients and arrests the fall in frequency. The frequency deviation is considered by the controller to provide the inertial control. An additional reference power output is used which helps the DFIG to release kinetic energy stored in rotating masses of the turbine. The optimal speed control parameters have been used for the DFIG to increases its participation in frequency control. The simulations carried out in a two-area interconnected power system demonstrate the contribution of the DFIG in load frequency control.

Keywords： doubly fed induction generator (DFIG)     load frequency control     inertial control     wind energy conversion    

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A novel light fluctuation spectrum method for in-line particle sizing

Shouxuan QIN, Xiaoshu CAI, Li MA

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 89-97 doi: 10.1007/s11708-012-0176-z

Abstract: This paper discusses two problems in in-line particle sizing when using light fluctuation method.First, by retrieving the ratio of particle concentrations at different time, the intensity of incident lightThere exists narrow error between the calculated and pre-detected value of the intensity of incident light

Keywords： in-line measurement     particle size distribution (PSD)     incident light intensity     particle concentration     light fluctuation    

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Plasmonic light trapping for enhanced light absorption in film-coupled ultrathin metamaterial thermophotovoltaic

Qing NI, Hassan ALSHEHRI, Yue YANG, Hong YE, Liping WANG

Frontiers in Energy 2018, Volume 12, Issue 1,   Pages 185-194 doi: 10.1007/s11708-018-0522-x

Abstract: However, the light absorption in ultrathin cells is usually very weak compared to the corresponding bulkMoreover, short-circuit current density, open-circuit voltage, output electric power, and conversion

Keywords： metamaterial     thermophotovoltaic     plasmonics     light trapping     selective absorption    

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Title Author Date Type Operation

From plasma to plasmonics: toward sustainable and clean water production through membranes

Journal Article

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

Journal Article

Effect of Fe content on FeMn catalysts for light alkenes synthesis

ZHOU Jun, CHU Wei, ZHANG Hui, XU Huiyuan, ZHANG Tao

Journal Article

Facile synthesis and enhanced visible-light photocatalytic activity of Ti

Xiaojie Zhang,Lei Wang,Shuqing Chen,Yi Huang,Zhuonan Song,Miao Yu

Journal Article

A space power system of free piston Stirling generator based on potassium heat pipe

Mingqiang LIN, Jian MOU, Chunyun CHI, Guotong HONG, Panhe GE, Gu HU

Journal Article

Effect of temperature in the conversion of methanol to olefins (MTO) using an extruded SAPO-34 catalyst

Ignacio Jorge Castellanos-Beltran, Gnouyaro Palla Assima, Jean-Michel Lavoie

Journal Article

Photocatalytic syngas synthesis from CO

Ling Tan, Kipkorir Peter, Jing Ren, Baoyang Du, Xiaojie Hao, Yufei Zhao, Yu-Fei Song

Journal Article

Hydrogel photocatalysts for efficient energy conversion and environmental treatment

Journal Article

Biological conversion pathways of sulfate reduction ammonium oxidation in anammox consortia

Zhen Bi, Deqing Wanyan, Xiang Li, Yong Huang

Journal Article

Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

Journal Article

Photocatalysis: from solar light to hydrogen energy

Journal Article

Sustainable conversion regenerated cellulose into cellulose oleate by sonochemistry

Journal Article

Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Journal Article

A novel light fluctuation spectrum method for in-line particle sizing

Shouxuan QIN, Xiaoshu CAI, Li MA

Journal Article

Plasmonic light trapping for enhanced light absorption in film-coupled ultrathin metamaterial thermophotovoltaic

Qing NI, Hassan ALSHEHRI, Yue YANG, Hong YE, Liping WANG

Journal Article