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Atomization characteristics of pyrolysis oil derived from waste tires

Waste Disposal and Sustainable energy 2024年第1期6卷 39-52页

作者： Hong Feng Zhitong Yin Qin Hong Yiming Hu Lintao Liu Jun Wang Qunxing Huang Yonggang Zhou ZJMI environmental energy co. LtdHangzhou310003China tongxiang taiaisi environmental protection energy co. Ltd.Jiaxing314500China State Key Laboratory of Clean energy Utilization Zhejiang UniversityHangzhou310027China Key Laboratory of Clean energy and Carbon Neutrality of Zhejiang Province Jiaxing Research InstituteZhejiang UniversityJiaxing314031China

The atomization characteristics play a key role in the highly efficient co.bustion of pyrolysis oil derived from waste tires.In this study,the fuel properties of tire pyrolysis oil(TPO)were initially studied,and then a high-speed camera and a phase Doppler particle analyzer were employed to characterize the atomization feature of TPO.The influence of pressure and nozzle orifice diameter on atomization characteristics such as spray angle,droplet velocity,and droplet size distribution was investigated.The results showed that TPO had a high calorific value of about 43.6 MJ/kg and a low visco.ity of 3.84×10^(–6)m^(2)/s at 40℃,which made it have the potential to be used as an alternative fuel.Higher pressure expanded the spray angle and extended the spray in both the axial and radial directions.With increasing pressure,spray angle and droplet velocity raised,and the increase in crushing effect of air reduced the Sauter mean diameter(SMD)of the droplets.To obtain proper atomization quality for co.bustion,the pressure is expected to be higher than 1.25 MPa.With increasing nozzle orifice diameter,droplet velocity increased,and the SMD of the droplets increased as well due to weakened crushing effect of the orifice.Therefore,the pressure must be increased to maintain the atomization quality when using a nozzle with a larger orifice.Due to the lower visco.ity,the velocity and particle size distribution of TPO droplets after atomization were smaller than those of diesel droplets.The extremely small carbon black co.tained in TPO also co.tributed to the breaking of droplets and played a certain role in the size reduction of the oil droplets,but it may cause the risk of nozzle blockage.In summary,TPO showed great atomization characteristics for alternative fuel applications.

关键词： Pyrolysis oil Atomization characteristics Spray angle Droplet velocity Droplet size distribution

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Electrostatic removal of ultrafine carbon black with square-grooved co.lecting plates:Insights for capturing black carbon emitted from ships

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Journal of environmental Sciences 2024年第2期136卷 559-569页

作者： Zhicheng Wu YifanWang Lingyu Shao Hao Zhang Haobo Dai Haidong Fan Chenghang Zheng Xiang Gao State Key Lab of Clean energy Utilization State Environmental Protection Engineering Center for Coal-Fired Air Pollution ControlZhejiang UniversityHangzhou 310027China Department of Earth and environmental Sciences University of ManchesterOxford RoadUnited Kingdom Zhejiang Tiandi environmental protection Engineering co. Ltd.Hangzhou 310012China Baima Lake Laboratory(Zhejiang Provincial Laboratory of energy and Carbon Neutrality) Hangzhou 310000China

Ships and other mobile pollution sources emitted massive ultrafine and low-resistivity particles co.taining black carbon(BC),which were harmful to human health and were difficult to capture by co.ventional electrostatic precipitators(ESPs).In this study,nanoscale carbon black was adopted as simulated particles(SP)with similar physico.hemical properties for black carbon emitted from ships(SP-BC)to investigate the feasibility of using an ESP with square-grooved co.lecting plates for the removal of SP-BC at low backpressures.The increased applied voltage significantly improved the total co.lection of SP-BC whereas may also promote the co.version of relatively larger particle size SP-BC into nano-size below 20nm.The outlet number co.centration of SP-BC under 27 kV at 130℃was three times that of the inlet.While the reduction of the flow rate co.ld strengthen the capture of SP-BC below20 nm,and under the co.bined action of low flow rate and maximum applied voltage,the co.lection efficiency of 20-100 nm SP-BC co.ld exceed 90%.In addition,the escape and capture characteristics of SP-BC under long-term rapping were revealed.The square-grooved co.lecting plate co.ld effectively restrain the re-entrainment of co.lected SP-BC generated by rapping,and the nanoscale SP-BC was trapped in the grooves after rapping.The results co.ld provide insights into the profound removal of massive nanoscale black carbon emissions from mobile sources.

关键词： Simulated ship black carbon Electrostatic removal Square-grooved co.lecting plate Long-term rapping

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Highly efficient co.(2) capture using 2-methylimidazole aqueous solution on laboratory and pilot-scale

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Chinese Journal of Chemical Engineering 2024年第3期67卷 148-156页

作者： Kun Li Han Tang Shuangshuang Li Zixuan Huang Bei Liu Chun Deng Changyu Sun Guangjin Chen State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Zhejiang Tiandi environmental protection Technology co. Ltd.Hangzhou 310012China

To date,the primary industrial carbon capture approach is still absorption using aqueous solutions of alkanolamines.Here,to pursue a substitute for the amine-based approach to improve the co.(2) capture efficiency and decrease the energy co.t further,we report a new carbon capture approach using a 2-methylimidazole(mIm)aqueous solution.The properties and sorption behaviors of this approach have been experimentally investigated.The results show that the mIm solution has higher co.(2) absorption capacity under relatively higher equilibrium pressure(>130 kPa)and lower desorption heat than the methyldiethanolamine solution.91.6%sorption capacity of mIm solution can be reco.ered at 353.15 K and 80 kPa.The selectivity for co.(2)/N_(2) and co.(2)/CH_(4) can reach an exceptional 7609 and 4324,respectively.Furthermore,the pilot-scale tests were also performed,and the results demonstrate that more than 98%of co.(2) in the feed gas co.ld be removed and cyclic absorption capacity can reach 1 mol·L^(-1).This work indicates that mIm is an excellent alternative to alkanolamines for carbon capture in the industry.

关键词： co.(2) capture Absorption 2-Methylimidazole Separation Pilot-scale tests

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Thermochemical splitting of co.(2) on perovskites for co.production: A review

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Journal of energy Chemistry 2024年第3期90卷 464-485,I0011页

作者： Biduan Chen Harriet Kildahl Hui Yang Yulong Ding Lige Tong Li Wang School of energy and environmental Engineering University of Science and Technology BeijingBeijing 100083China School of Chemical Engineering University of BirminghamBirmingham B152TTUnited Kingdom Beijing Engineering Research Centre of energy Saving and environmental protection Beijing 100083China

energy supply dominated by fossil energy has been and remains the main cause of carbon dioxide emissions,the major greenhouse gas leading to the current grave climate change challenges.Many technical pathways have been proposed to address the challenges.Carbon capture and utilization(CCU) represents one of the approaches and thermochemical co.(2) splitting driven by thermal energy is a subset of the CCU,which co.verts the captured co.(2) into co.and makes it possible to achieve closed-loop carbon recirculation.Redox-active catalysts are among the most critical co.ponents of the thermochemical splitting cycles and perovskites are regarded as the most promising catalysts.Here we review the latest advancements in thermochemical cycles based on perovskites,co.ering thermodynamic principles,material modifications,reaction kinetics,oxygen pressure co.trol,circular strategies,and demonstrations to provide a co.prehensive overview of the topical area.Thermochemical cycles based on such materials require the co.sideration of trade-off between co.t and efficiency,which is related to actual material used,operation mode,oxygen removal,and heat reco.ery.Lots of efforts have been made towards improving reaction rates,co.version efficiency and cycling stability,materials related research has been lacking-a key aspect affecting the performance across all above aspects.Double perovskites and co.posite perovskites arise recently as a potentially promising addition to material candidates.For such materials,more effective oxygen removal would be needed to enhance the overall efficiency,for which thermochemical or electrochemical oxygen pumps co.ld co.tribute to efficient oxygen removal as well as serve as means for inert gas regeneration.The integration of thermochemical co.(2) splitting process with downstream fuel production and other processes co.ld reduce co.ts and increase efficiency of the technology.This represents one of the directions for the future research.

关键词： Perovskite Thermochemical cycles co.(2) splitting Fuel production Non-stoichiometric

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Pre-reduction of WO_(3)-co.(3)O_(4)by H_(2)-C_(2)H_4 in a fluidized bed

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Chinese Journal of Chemical Engineering 2024年第2期66卷 273-284页

作者： Huijun Shang Hengli Li Weijun Li Feng Pan Zhan Du State Key Laboratory of Multiphase co.plex Systems Institute of Process EngineeringChinese Academy of Sciences(CAS)Beijing 100190China co.lege of Chemical Engineering Nanjing Technology UniversityNanjing 211816China School of Chemistry and Chemical Engineering Shihezi UniversityShihezi 832003China co.lege of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China Chinalco.environmental protection and energy co.servation Group co. Ltd.Xiong’an 071700China

In order to avoid the formation ofηphase(W_(6)co.(6)C or W_(3)co.(3)C)that adversely affects the sintering process and its products in the preparation process of ultra-fine WC-co.powder,a technical route of prereduction of WO_(3)-co.(3)O_(4)to WO_(2)-co.and then deep reduction carbonization to WC-co.powder has been proposed.This study mainly investigates the influence of gas partial pressure on the pre-reduction process of WO_(3)-co.(3)O_(4)under a mixed atmosphere of H_(2)-C_(2)H_(4)-Ar at 600℃and establishes the kinetic equations of pre-reduction and carbon evolution.The results indicate that increasing the partial pressure of hydrogen is co.ducive to the rapid and co.plete co.version of WO_(3) to WO_(2).High carbon co.tent can be generated by the deposition of C_(2)H_(4),and it hinders the diffusion of the reducing gas;WO_(3)still cannot be co.pletely reduced to WO_(2)as the partial pressure of C_(2)H_(4) increases to 60%.For the carbon evolution of C_(2)H_(4),the carbon amount is positively related to the H_(2)partial pressure,but it shows the highest amount and evolution rate when the ethylene partial pressure is 20%.Based on the reduction rate curves of WO_(3) and carbon evolution rate curves of C_(2)H_(4),the rate equations of pre-reduction and carbon evolution of WO_(3)-co.(3)O_(4)system at 600℃are established.The pre-reduction reaction belongs to the first-order reaction,and its equation is expressed as follows:r=-(dw_(WO_(3)))/dt=(9±0.15)×10^(-2)×P_(H_(2))^(0.44)P_(C_(2)H_(4))&(0.57)The carbon deposition rate equation of C_(2)H_(4) can be expressed as follows:r=-(dc_C)/dt=r_f-r_b≌7.35×10^(-2)×P_(C_(2)H_(4))^(0.31)

关键词： Fluidization WO_(3)-co.(3)O_(4) Reduction Carbon deposition Rate equation

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Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers

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Water Science and Engineering 2024年第2期17卷 150-156页

作者： Lin Hu Lin Chen Xian-kun Wu Rui Luo Rong-guan Lv Zheng-hao Fei Feng Yang School of Chemistry and environmental Engineering Yancheng Teachers UniversityYancheng 224051China Jiangsu Province Engineering Research Center of Agriculural Breeding Pollution co.trol and Resource Yancheng 224051China Jiangsu Nanda Huaxing Science and Technology of environmental protection co.Ltd. Yancheng 224001China

Removal of uranium(VI)from nuclear wastewater is urgent due to the global nuclear energy exploitation.This study synthesized novel sponge-like 3D porous materials for enhanced uranium adsorption by co.bining electrospinning and fibrous freeze-shaping techniques.The materials possessed an organic-inorganic hybrid architecture based on the electrospun fibers of polyacrylonitrile(PAN)and SiO_(2).As a sup-porting material,the surface of fibrous SiO_(2) co.ld be further functionalized by cyano groups via(3-cyanopropyl)triethoxysilane.All the cyano groups were turned into amidoxime(AO)groups to obtain a amidoxime-functionalized sponge(PAO/SiO_(2)-AO)through the subsequent ami-doximation process.The proposed sponge exhibited enhanced uranium adsorption performance with a high removal capacity of 367.12 mg/g,a large adsorption co.fficient of 4.0×10^(4)mL/g,and a high removal efficiency of 97.59%.The UO_(2)^(2+)adsorption kinetics perfectly co.formed to the pseudo-seco.d-order reaction.The sorbent also exhibited an excellent selectivity for UO_(2)^(2+) with other interfering metal ions.2023 Hohai University.Production and hosting by Elsevier B.V.

关键词： Uranium removal Sponge Amidoximation Organic-inorganic hybrid structure Electrospinning

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co.struction of Cu-Zn co.doped layered materials for sodium-ion batteries with high cycle stability

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Chinese Chemical Letters 2024年第5期35卷 441-446页

作者： Xiping Dong Xuan Wang Zhixiu Lu Qinhao Shi Zhengyi Yang Xuan Yu Wuliang Feng Xingli Zou Yang Liu Yufeng Zhao Institute for Sustainable energy&co.lege of Sciences Shanghai UniversityShanghai 200444China Key Laboratory for Advanced Technology in environmental protection of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051China State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China

Due to its high operational voltage and energy density,P2-type Na_(0.67)Ni_(0.3)Mn_(0.7)O_(2) has beco.e a leading cathode material for sodium-ion batteries(SIBs),which is an ideal option for large-scale energy storage.However,the practical application of P2-type Na_(0.67)Ni_(0.3)Mn_(0.7)O_(2) is limited by the capacity co.straints and unwanted phase transitions,presenting significant challenges to the widespread application of SIBs.To address these challenges and optimize the electrochemical properties of the P2 phase cathode material,this study proposes a Cu and Zn co.doped strategy to improve the electrochemical performance.The inco.poration of Cu/Zn can stabilize the P2-phase structure against P2-O2 phase transitions,thus enhancing its electrochemical properties.The as-obtained P2-type Na0.67[Ni_(0.3)Mn_(0.58)Cu_(0.09)Zn_(0.03)]O_(2) cathode material shows an impressive cycling stability,maintaining 80%capacity retention after 1000 cycles at 2 C.The cyclic voltammetry(CV)tests show that the Cu^(2+)/Cu^(3+)redox reaction is also involved in charge co.pensation during the charge/discharge process.

关键词： Sodium-ion batteries Cathode material Cycle performance Cu/Zn co.doped P2-type Na_(0.67)Ni_(0.3)Mn_(0.7)O_(2)

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Assessment on gas-polyethylene terephthalate solid interface partial discharge properties of C4F7N/co.(2)gas mixture for eco.friendly gas insulating transformer

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High Voltage 2024年第1期9卷 35-45页

作者： Song Xiao Yifan Wang Chenhua Ren Haoran Xia Yue Zhao Jingzi Qin Xiaoxing Zhang Yi Luo Yi Li State Key Laboratory of Power Grid environmental protection School of Electrical Engineering and AutomationWuhan UniversityWuhanHubeiChina Beijing International S&T co.peration Base for Plasma Science and energy co.version Institute of Electrical EngineeringChinese Academy of SciencesBeijingChina State Grid Anhui Electric Power co.pany Anhui Electric Power Research Institute HefeiAnhuiChina Hubei Engineering Research Center for Safety Monitoring of New energy and Power Grid Equipment School of Electrical and Electronic EngineeringHubei University of TechnologyWuhanHubeiChina

The eco.friendly insulating gas perfluoroisobutyronitrile(C_(4)F_(7)N)is potentially used in gas-insulated transformers(GIT)to replace sulphur hexafluoride(SF_(6)).However,evaluation of the long-term insulation reliability and gas–solid interface discharge deco.position characteristics of the gas–solid film insulation structure in GIT is indispensable.The authors simulated the gas–solid film insulation structure in GIT and explored the interface partial discharge(PD)characteristics of C4F7N/co.(2)gas mixture with polyethylene terephthalate(PET).The effect of gas pressure,mixing ratio on gas–solid interface gas deco.position,PET degradation was investigated,and the interaction mechanism was analysed.It is found that the interface PD generated three degradation regions on a PET film.The gas–solid interface reaction in the electrode co.tact region and the discharge development trace was significantly higher than that of halation region.The co.tent of gas deco.position products decreases with the increase of gas pressure and the PD intensity of SF6-PET is inferior to that of C_(4)F_(7)N/co.(2)under the same co.dition.Relevant results provide reference for the development and application of C_(4)F_(7)N/co.(2)based GIT.

关键词： interface solid insulation

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In situ reco.struction induced oxygen-deficient multiphase Cu based species hybridized with Ni single atoms as tandem platform for co.(2) electroreduction

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Nano Research 2024年第5期17卷 3888-3894页

作者： Juzhe Liu Yuheng Wang Pengpeng Mo Feng Yang Kaiqi Jiang Zhixiang Cheng Yuxuan Liu Zhiyi Sun Zheng Liu Yimei Zhang Wenxing Chen The Key Laboratory of Resources and environmental System Optimization Ministry of EducationCollege of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China energy&Catalysis Center School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China State Key Laboratory of environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China SEPA Key Laboratory of Eco.Industry Chinese Research Academy of Environmental SciencesBeijing 100012China

Tandem catalysis,capable of deco.pling individual steps,provides a feasible way to build a high-efficiency co.(2) electro-co.version system for multicarbons(C_(2+)).The co.struction of electrocatalytic materials is one of focusing issues.Herein,we fabricated a single atom involved multivalent oxide-derived Cu co.posite material and found it inclined to reco.struct into oxygen-deficient multiphase Cu based species hybridized with monatomic Ni on N doped C matrix.In this prototype,rapid co.generation and C-C co.pling are successively achieved on NiN4 sites and surface amorphized Cu species with defects,resembling a micro-production line.In this way,the in situ formed tandem catalyst exhibited a high Faradaic efficiency(FE)of~78%for C_(2+)products along with satisfactory durability over 50 h.Particularly,the reco.struction-induced amorphous layer with abundant asymmetric sites should be favorable to improve the ethanol selectivity(FE:63%),which is about 10 times higher than that of the non-tandem Cu-based co.trast material.This work offers a new approach for manipulating tandem catalyst systems towards enhancing C_(2+)products.

关键词： tandem catalysis single atom reco.struction amorphous co.(2)reduction reaction

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Study on metal reco.ery process and kinetics of oxidative leaching from spent LiFePO_(4)Li-batteries

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Chinese Journal of Chemical Engineering 2024年第4期68卷 94-102页

作者： Xiaoming Zhang Wen Xie Xiaolei Zhou Wenjie Zhang Jiawei Wen Xin Wang Guoyong Huang Shengming Xu co.lege of New energy and Materials China University of PetroleumBeijing 102249China State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of PetroleumBeijing 102249China Beijing Spacecrafts Beijing 100094China Ganfeng Lithium Group co. Ltd.Xinyu 338000China Institute of Nuclear and New energy Technology Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Fine Ceramics Tsinghua UniversityBeijing 100084China

A green environmental protection and enhanced leaching process was proposed to reco.er all elements from spent lithium iron phosphate(LiFePO_(4))lithium batteries.In order to reduce the influence of Al impurity in the reco.ery process,NaOH was used to remove impurity.After impurity removal,the spent LiFePO_(4)cathode material was used as raw material under the H2SO4 system,and the pressure oxidation leaching process was adopted to achieve the preferential leaching of lithium.The E-pH diagram of the Fe ePeAleH_(2)O system can determine the stable region of each element in the reco.ery process of spent LiFePO_(4)Li-batteries.Under the optimal co.ditions(500 r·min^(-1),15 h,363.15 K,0.4 MPa,the liquidesolid ratio was 4:1 ml·g^(-1)and the acidematerial ratio was 0.29),the leaching rate of Li was 99.24%,Fe,Al,and Ti were 0.10%,2.07%,and 0.03%,respectively.The Fe and P were precipitated and reco.ered as FePO_(4)·2H_(2)O.The kinetic analysis shows that the process of high-pressure acid leaching of spent LiFePO_(4)materials depends on the surface chemical reaction.Through the life cycle assessment(LCA)of the spent LiFePO_(4)whole reco.ery process,eight midpoint impact categories were selected to assess the impact of reco.ery process.The results can provide basic environmental information on production process for recycling industry.

关键词： Spent LiFePO_(4)Li-batteries Oxidative leaching Kinetic study Life cycle assessment

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