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颗粒学报（英文版）
颗粒学报（英文版）

郭慕孙

双月刊

1674-2001

jcsp@home.ipe.ac.cn

010-82629146

100080

北京中关村北二条1号中科院过程所内

颗粒学报（英文版）/Journal China ParticuologyCSCDCSTPCD北大核心EISCI
查看更多>>本刊以创精品与国际化为办刊方针，旨在反映中国颗粒学研究的最新成果、及时追踪国际颗粒学领域的最新动态。学报主要刊登国内外颗粒学领域中的研究、工程和应用方面的优秀原始论文，包括颗粒测试与表征、颗粒制备与处理、流态化、气溶胶和超微颗粒等。本刊不仅设有论坛、研究论文、研究简报等内容，还有书评、会议信息与报道、测试仪器进展等栏目，便于相关人士进行学术交流，并为科技成果的展示提供平台，信息十分丰富。本刊已陆续被美国化学文摘（CA），俄罗斯文摘杂志（AJ），剑桥科学文摘（CSA）以及中国科技论文与引文数据库(CSTPCD)收录。China PARTICUOLOGY, a bimonthly interdisciplinary journal in English, purports to present the best papers in research, engineering and application in the overall field of PARTICUOLOGY, including particle characterization, particle preparation, aerosol, fluidization and ultra-fine particles. The word PARTICUOLOGY was coined to correspond to its Chinese terminology, which denotes both the science and technology of particles. Although the journal is China-based, it serves as a medium for all accepted papers of international origin, especially the best papers representing current advances in the world. Besides scientific and engineering papers, the journal includes the following sections: R & D notes, Current events, Editorials reviews, Forum for comments, opinions and qualified speculations, News on books, instruments and meetings.Now， China Particuology has been indexed by CA, AJ , CSA and CSTPCD.??读者对象（Audiences）： 中国颗粒学会会员、国内外从事颗粒学和颗粒技术研究和生产的大专院校师生、科研院所及企业的研究人员和技术人员。 Member of Chinese Society of Particuology, and researchers or experts who are engaged in the study of particle sciences and technology coming from colleges, institutes and corporations all over the world.
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    Study on the fast elimination of smoke particle based on electro-acoustic coupling agglomeration technology

    Jie FengMingfeng LuKaige WangKun Luo...
    1-10页
    查看更多>>摘要：Fire smoke,which consists large amounts of fine particles,is considered as the fatal factor in fires.In this study,a fast smoke particle elimination method based on electro-acoustic coupling agglomeration technology is proposed.First,the experimental results show that the electro-acoustic coupling agglomeration has higher smoke elimination efficiency compared to single-field.The smoke trans-mission is much less than 80％after 30 s of single acoustic or electric field action,while the coupled field reaches 90％.Then,the effects of acoustic frequency,sound pressure level and voltage on the smoke elimination characteristics are discussed.It is found that the optimal acoustic frequency is 1.5 kHz.While as the sound pressure level and voltage increase,the elimination efficiency first increases and then tends to stabilize,the critical values of the sound pressure level and voltage are 135 dB and 7 kV.This indicates that there is an optimal combination of the three variables.Finally,through the theoretical analysis of particle movement and the micro-morphology of agglomerates,the particle agglomeration mechanism under the electro-acoustic coupling is analyzed.This study provides a new idea for the fast elimination of fire smoke particle.
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    Cobalt phosphide-based composites as anodes for lithium-ion batteries:From mechanism,preparation to performance

    Bo LanYishan WangJialei LuDongdong Liu...
    11-31页
    查看更多>>摘要：With the further requirements of electronic products and powered vehicles,the development of a new generation with low-voltage and high-capacity anode materials is crucial for lithium-ion batteries(LIBs).Transition metal phosphides,especially cobalt phosphide(CoP)composites,have become a research hotspot for LIBs anode materials in recent years due to their high theoretical specific capacity,low po-larization,and suitable voltage plateau.This review first systematically discusses the lithium storage mechanism and preparation methods of CoP in current research.Subsequently,the applications of CoP anode materials in LIBs are categorically reviewed,including the composites of CoP with various types of carbon materials and heterostructures.Finally,the challenges and future development directions of CoP anode materials are summarized to provide guidance for further improving the lithium storage per-formance of CoP and its practical applications.
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    Material characterization and inter/intra-particle validation for DEM simulation of urea coating process

    Salma A.NouhKuZilati KuShaariLau Kok KeongShafirah Samsuri...
    32-48页
    查看更多>>摘要：Particle coating is a common operation in the controlled-release fertilizer(CRF)industry,where a coating layer is appliedto the urea cores.A discrete element method(DEM)computer simulation was applied to model the coating process for the urea granules using measured model parameters.The accuracy of DEM input parameters for the coating material properties and the physical and mechanical characterizations of urea granules are crucial to the study of particle coating processes.Thus,to enhance the simulation accuracy,information on the material properties(urea granules)is required.In this study,the elasticity parameters,shear modulus,coefficient of restitution(CoR),and coefficient of rolling and static friction(CoRF)and(CoSF)of urea granules are estimated experimentally in addition to the physical character-istics.The sensitivity of the angle of repose of the urea bed was investigated at different coefficients of friction.According to the obtained experimental value of the angle of repose,values of 0.2 and 0.3 for CoRF and CoSF,respectively,were adjusted to obtain consistent urea granules'motion for simulation and the experiment.Moreover,the spray droplet sizes and velocity distributions were estimated using the video-imaging process technique.Based on this experimental characterization,elasticity parameters and spray properties were integrated into DEM simulation software as input data to perform numerical analysis of the coating process to compare simulation and experimental results,which show uniformity at three different pan speeds with a maximum deviation of 0.033 at 5 rpm.Also,consistency between DEM and experiment results was achieved in terms of average coating thickness(μm)of the selected samples and average intra-particle thickness variation(CoVintra).These results revealed that the coating film thickness is proportional to the rotation speed for the experiment and simulation.To enhance the inter-particle coating uniformity,the effects of the most significant parameters such as pan speed,filling ratio,particle size,spray rate,and spray angle,were examined.A low spray rate,filling ratio,and high pan speed improved the coating uniformity.The particle size and spray angle show considerable influ-ence on the coating uniformity,where larger particle sizes and spray angles tend to reduce the inter-particle coating uniformity.
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    Experimental investigation about the incipient velocity of spherical particles on a hemispherical bed surface

    Chuannan LiJie ChenChangbo JiangXie Li...
    49-61页
    查看更多>>摘要：The sediment particles play a huge role in shaping the bed load transport.In this research,240 water-tunnel experiments are carried out to investigate the incipient velocity of the observation particles in two particle arrangements.To accurately predict the incipient velocity of the observation particles,the equation is conceived by the rolling instability mechanism.The incipient velocity equations and experimental data are used to analyze the trend of dispersive pressure and the effect of arrangement position on velocity.We find that it is appropriate to choose the coefficient of drag as 0.261 and the coefficient of lift as 0.198 for the incipient velocity equation of spherical particles on the hemispherical bed surface.Furthermore,the dispersive pressure is closely related to the flow state,particle size,and particle arrangement,which leads to the incipient velocity of the observation particle being at a mini-mum when the interference particle angle is 45°.Finally,the particle spacing and the projected area changed with the arrangements,directly affecting the incipient velocity of the observed particle.The analysis of four aspects for the coefficients,dispersive pressure,different particle spacing,and projected area will facilitate the prediction of particle incipient velocity,especially on hemispherical beds.
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    Waste to treasure:Reutilization of fluid catalytic cracking coke block as photothermal conversion material for water evaporation

    Zhuwei GaoChengxin LiJingjing HeZhuo Wang...
    62-70页
    查看更多>>摘要：This study aims to analyze the coking process and propose an effective method for the reutilization of fluid catalytic cracking(FCC)coke block.Herein,we analyzed the basic characteristics and chemical composition of FCC coke blocks.The results showed that the main components were carbon,oxygen,and aluminum,accounting for 60.8％,26.6％,and 11.5％,respectively.Under the conventional catalytic cracking reaction temperature from 500 ℃ to 600 ℃,the formation of the first aromatic hydrocarbon was particularly important for the formation of coke.The condensation of oil-gas-entrained catalyst particles and their heavy components was the physical cause of coking,while the dehydrogenation condensation reaction of oil-gas heavy components was the chemical factor.In addition,the membrane prepared by powdered coke had excellent photothermal conversion ability,which could be heated to more than 110 ℃ within 360 s under two fixed light intensities.The evaporation rate of photothermal water was 5.89 kg m2 h-1,which has great industrial application potential.These works provide a novel and effective method of separation membrane for the reutilization of FCC coke blocks.
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    Insights into adsorbent tortuosity across aqueous adsorption systems

    Ackmez MudhooMarta OteroKhim Hoong Chu
    71-88页
    查看更多>>摘要：Pore network,pore connectivity,and the resulting effective adsorbate pore diffusivity within an adsor-bent are critical physical considerations in mass transport modeling of aqueous adsorption.Tied to these three adsorbent features are the adsorbent tortuosity and tortuosity factor concepts.These concepts encompass the collective hindrance to intra-adsorbent adsorbate transport arising because of a disor-derly adsorbent porous topology.It is crucial for materials scientists,chemists,chemical engineers,and water treatment specialists to understand the complex and variable connections among adsorbate chemistry,adsorbent chemistry,adsorbent porosity,pore shape,size,and tortuosity,pore wall effect,adsorbate-adsorbent interactions,and adsorbate-adsorbate interactions in competitively contaminated aqueous environments.Adsorbent tortuosity has been sporadically studied in aqueous adsorption models.Despite the small population of these studies,insightful observations and inferences have been reported.However,as it appears,no review has been published to compile,compare,and contrast these aspects.Hence,this review concisely brings up those observations and interpretations around adsorbent tortuosity for aqueous adsorption systems.The notion of an adsorbent's tortuosity being single-valued is argued to be imprecise.Finally,perspectives are aired on possible research and development directions for elucidating the dynamic attributes of adsorbent tortuosity and applying them in real-scale adsorp-tion-oriented water purification.The data acquired by filling in these research gaps can enable the design of adsorbents more adapted for real-scale water purification.
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    Study on preparation,characterization and application of mixed-colorants thermochromic microcapsules

    Lan ZhouJingpeng YeQinze CaiGuojin Liu...
    89-97页
    查看更多>>摘要：In order to expand the color-change range and make the discoloration temperature suitable for the daily textiles,a new formulation of mixed-colorants thermochromic core material is designed,in which crystal violet lactone(CVL)is the basic color former,bisphenol A(BPA)is the developer,especially the solvent-based dye and dodecyl dedecanoate are used as the extended dye and the solvent,respectively.Scanning electron microscope(SEM),differential scanning calorimeter(DSC)and thermogravimetric analyzer(TGA)were applied to study the morphology,encapsulation rate,non-isothermal crystallization behavior and thermal stability of the mixed-colorant thermochromic microcapsules(MCTMs)prepared by in-situ polymerization.The results show that MCTMs have good sphericity,uniform particle size,good thermal stability and the encapsulation rate can reach 86.73％.Under the non-isothermal conditions,the encapsulation of formaldehyde-melamine resin wall material can slightly reduce the crystallization rate of the solvent,but does not affect the relative crystallinity,thermal properties and discoloration sensi-tivity of the core materials.With the variety of ambient temperatures in the range of 20-35 ℃,the printed cotton fabrics with MCTMs could change color reversibly between different tones with good reliability and durability,and exhibit more gorgeous colors than the common thermochromic materials.
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    Kinetic model of vibration screening for granular materials based on biological neural network

    Zhan ZhaoYan ZhangFang QinMingzhi Jin...
    98-106页
    查看更多>>摘要：The kinetic model is the theoretical basis for optimizing the structure and operation performance of vibration screening devices.In this paper,a biological neurodynamic equation and neural connections were established according to the motion and interaction properties of the material under vibration excitation.The material feeding to the screen and the material passing through apertures were considered as excitatory and inhibitory inputs,respectively,and the generated stable neural activity landscape was used to describe the material distribution on the 2D screen surface.The dynamic process of material vibration screening was simulated using discrete element method(DEM).By comparing the similarity between the material distribution established using biological neural network(BNN)and that obtained using DEM simulation,the optimum coefficients of BNN model under a certain screening parameter were determined,that is,one relationship between the BNN model coefficients and the screening operation parameters was established.Different screening parameters were randomly selected,and the corresponding relationships were established as a database.Then,with straw/grain ratio,aperture diameter,inclination angle,vibration strength in normal and tangential directions as inputs,five independent adaptive neuro-fuzzy inference systems(ANFIS)were established to predict the optimum BNN model coefficients,respectively.The training results indicated that ANFIS models had good stability and accuracy.The flexibility and adaptability of the proposed BNN method was demon-strated by modeling material distribution under complex feeding conditions such as multiple regions and non-uniform rate.
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    DEM analysis of the influence of stirrer design on die filling with forced powder feeding

    Chao ZhengEdward YostAriel R.MuliadiNicolin Govender...
    107-115页
    查看更多>>摘要：Die filling is a critical stage during powder compaction,which can significantly affect the product quality and efficiency.In this paper,a forced feeder is introduced attempting to improve the filling performance of a lab-scale die filling system.The die filling process is analysed with a graphics processing units(GPU)enhanced discrete element method(DEM).Various stirrer designs are assessed for a wide range of process settings(i.e.,stirrer speed,filling speed)to explore their influence on the die filling performance of free-flowing powder.Numerical results show that die filing with the novel helical-ribbon(i.e.,type D)stirrer design exhibits the highest filling ratio,implying that it is the most robust stirrer design for the feeder configuration considered.Furthermore,die filling performance with the type D stirrer design is a function of the stirrer speed and the filling speed.A positive variation of filling ratio(ηf＞0％)can be ensured over the whole range of filling speed by adjusting the stirrer speed(i.e.,increasing the stirrer speed).The approach used in this study can not only help understand how the stirrer design affects the die filling performance but also guide the optimization of feeder system and process settings.
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    Clarification of the dispersion mechanism of cathode slurry of lithium-ion battery under effects of both poly vinylidene fluoride/carbon black ratio and mixing time

    Zhilong WangZhenzhen ZhaoYe YangAn Zhang...
    116-127页
    查看更多>>摘要：This paper presents the effects of both poly vinylidene fluoride(PVDF)/carbon black(CB)ratio(mPVDF∶mCB)and mixing time t on the dispersion mechanism of the cathode slurry of lithium-ion battery(LIB).The dispersion mechanism is deduced from the electrochemical,morphological and theological properties of the cathode slurry by using electrical impedance spectroscopy(EIS),scanning electron microscopy and rheology methods,respectively.From the perspective of EIS method,static simulation models are established in the COMSOL Multiphysics software;meanwhile,the simulated results are used to verify the correctness of the electrochemical properties of the cathode slurry.As a result,the following conclusions are able to be obtained.Firstly,in the case of the mass ratio mPVDF∶mCB=5∶10,LiCoO2 particles are completely coated by the mixture of CB and PVDF to form a stable polymer gel structure.Higher or lower mPVDF∶mCB leads to the larger impedance and worse dispersion status for the cathode slurry.Secondly,when t=6 min,a good gel-like conductive network structure is formed by coating the thinner evenly dispersed CB-PVDF double layer around LiCoO2 particles.Finally,a strategy regarding to both mPVDF∶mCB and t in experimental scale is proposed,which has the capability of improving the performance of LIB.
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