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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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    Improved mesh-free SPH approach for loose top coal caving modeling

    Xiangwei DongQiang ZhangYang LiuXin Liu...
    1-27页
    查看更多>>摘要：This study presents an innovative model in computational geotechnical engineering by improving the Smoothed Particle Hydrodynamics(SPH)method for simulating loose particle dynamics in coal caving processes.The improved model integrates an elastic-perfectly plastic constitutive model with the Drucker-Prager yield criterion and includes several improvements aimed at boosting accuracy,stability,and efficiency.These improvements include gravity loading coupled with particle damping,first-order stress field smoothing,and kernel gradient correction.A series of numerical experiments validates the effectiveness of the improved SPH model,demonstrating its capability to predict large deformations and track the evolution of the coal-rock interface in coal caving processes.Furthermore,the study analyzes the model's sensitivity to material parameters such as the angle of friction and material density,which aids in configuring the model for distinct coal mining situations.Results show that the non-cohesive elastic-perfectly plastic constitutive model can effectively simulate the flow behavior of granular parti-cles,and the landslide simulation results are in good agreement with the experiments.The improved SPH algorithm with stress smoothing technique solves the problem of numerical noise,and the"double peak"stress distribution around the coal outlet is identified.The established SPH model offers an effective tool for understanding dynamics behaviors of loose top coal.Significantly,the model requires only five material parameters,which can be identified through standard experiments,avoiding the typically arduous process of parameter selection or calibration commonly existing in Discrete Element Method simulations.
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    Combining Ultra-Turrax and ultrasonic homogenization to achieve higher vitamin E encapsulation efficiency in spray drying

    Letícia SiqueiraCristiano Augusto BallusEduardo Hiromitsu TanabeDaniel Assumpção Bertuol...
    28-35页
    查看更多>>摘要：Vitamin E,a soluble antioxidant widely used in the food and pharmaceutical industries,is rich in to-copherols and phytosterols.Since vitamin E molecules are highly sensitive to oxidation,encapsulation is a viable and effective technique for preservation of the properties of Vitamin E and improving its stability during storage,maintaining the nutritional value.In this work,the aim was to encapsulate concentrated vitamin E using a combination of Ultra-Turrax and ultrasonication to achieve higher encapsulation ef-ficiency in spray drying.In the first stage,the vitamin E oil was encapsulated employing only Ultra-Turrax homogenization,with subsequent optimization of spray drying.The coating materials used were maltodextrin and whey protein isolate.Optimization of the spray drying step evaluated the effects of the drying air temperature(T)and the feed flow rate(Q),to obtain better yields and a high-quality product.In the second stage,the use of ultrasonication in an additional homogenization step was evaluated,aiming to further improve the encapsulation process.The results showed that the best drying conditions(first stage)were T=180℃ and Q=0.6 L/h,which provided the highest yield(67.73％)and high encapsulation efficiency(73.73％).The microspheres produced had similar properties,with mean diameters ranging from 0.64 to 12.99 μm.In the second stage of the investigation,the application of ultrasonication immediately after the Ultra-Turrax homogenization enabled the encapsulation efficiency to be increased to 94.05％,with a yield of 57.54％,using an ultrasonication time of only 7 min.This showed that addition of the ultrasonic homogenization step to the process greatly improved the encapsulation efficiency and could be used to produce vitamin E-enriched powder microcapsules by spray drying,with application in the food industry.
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    Effect of particle Froude number on sub-grid effective drag,filtered and residual stresses in fluidized gas-particle flows

    Christian C.MilioliFernando E.Milioli
    36-48页
    查看更多>>摘要：Sub-grid effective drag,filtered and residual stresses in the meso-scale of gas-particle fluidized flows are intrinsically affected by underlying micro-scale conditions as well as non-local effects related to macro-scale conditions.In this work we applied microscopic two-fluid modeling to experiment with particle Froude number in order to evaluate the impact of this micro-scale condition over the concerning meso-scale derived sub-grid parameters.We performed highly resolved simulations in periodic domains for particle Froude numbers from 12.21 to 799.22,for a wide range of macro-scale conditions.Results were filtered and classified by ranges of meso-scale markers for the various particle Froude numbers.The particle Froude number was found to considerably affect the structural refinement of the heterogeneous flow fields thereby directly impacting effective drag,filtered and residual stresses.All of those param-eters showed systematic behaviors in relation to particle Froude number,thereby providing sound data for new sub-grid modeling propositions.
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    Optimization of LiB electrode with bi-diameter active particles using a microstructure-resolved model

    Peng ZhangJunqi WengPing LiGuanghua Ye...
    49-61页
    查看更多>>摘要：The microstructure of electrodes significantly affects the performance of lithium-ion batteries(LiBs),and using bi-diameter active particles is a simple but effective way to regulate the microstructure of com-mercial LiB electrodes.Herein,to optimize the LiB cathode of bi-diameter active particles,a microstructure-resolved model is developed and validated.The results indicate that randomly packing of bi-diameter active particles is optimal when the electrolyte diffusion limitation is mild,as it provides the highest volume fraction of active materials.Under strong electrolyte diffusion limitations,layered packing with small particles near the separator is preferred.This is because particles near the current collector have a low lithiation state.Besides,optimizing the random packing can further improve the energy density.For energy-oriented LiBs,a low volume fraction of small particles(0.2)is preferred due to the higher volume fraction of active materials.For power-oriented LiBs,a high volume fraction of small particles(0.8)is better because it reduces diffusion limitations.This work should serve to guide the optimal design of electrode microstructure for achieving high-performance LiBs.
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    Research progress of high-entropy perovskite oxides in energy and environmental applications:A review

    Jingrui CaoShibo WuJiahao HeYang Zhou...
    62-81页
    查看更多>>摘要：To address the global challenges associated with energy and environmental concerns,the design,development,and application of novel materials have emerged as pivotal drivers.Notably,high-entropy perovskite oxides(HEPOs)amalgamate the merits of both perovskite oxides and high-entropy materials,presenting significant potential in addressing numerous critical issues in energy and environment.This review delves into the recent advancements of HEPOs in these domains.Firstly,it provides an overview of prevalent synthesis techniques for HEPOs,alongside two emerging low-temperature,eco-friendly methods.Subsequently,current strategies to optimize the performance of HEPOs are summarized from three perspectives:compositional engineering,morphological engineering,and structural engineering.The review further underscores their applications in areas such as lithium-ion batteries,supercapacitors,electrocatalysts,and solid oxide fuel cells.Based on this foundation,potential performance optimization strategies and potential application areas of HEPOs are discussed.Finally,it identifies challenges faced by further development of HEPOs in energy and environmental applications and provides an outlook on future developments.
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    F-doping effects on microstructure and electrochemical performance of cathode material Li1.2Mn0.54Ni0.13Co0.13O2

    Xiaoqian SunYunhui DuWeiyi ZhangMengjiao Jin...
    82-91页
    查看更多>>摘要：Lithium-rich manganese-based(Li-rich Mn-based)cathode materials possess high specific capacity,low self-discharge rate and steady working voltage,but cycle performance and rate performance need to be further improved.In this study,cathode materials Li1.2Mn0.54Ni0.13Co0.13O2-xFx(x=0,0.02,0.05,0.08)are synthesized by the co-precipitation method with the two-step calcination process.And the F-doping effects on the microstructure and the electrochemical performance are investigated in the cathode materials Li1.2Mn0.54Ni0.13Co0.13O2.The results indicate that among all the F-doped cathode materials,the crystal lattice parameters are increased,order degree and stability of the layered structure are improved.As for x=0.05,cathode material Li1.2Mn0.54Ni0.13Co0.13O1.95F0.05(LMO-F0.05)shows the best cycle per-formance and rate performance with its capacity retention rate 87.7％after 100 cycles at 0.2 C and discharge capacity 117 mAh g-1 at 5 C high power.It can be seen that F doping is a simple and crucial strategy to promote the Li ion diffusion and develop high performance layered cathode materials.
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    Magnetic reduction of gas back-mixing in bubbling fluidized beds with Geldart-B magnetizable particles

    Qiang ZhangYalong CaoWankun LiuHao Guan...
    92-102页
    查看更多>>摘要：This study investigated the performance of magnetic fields in reducing gas back-mixing in bubbling fluidized beds with Geldart-B magnetizable particles.The Peclet number(Pe)and axial dispersion co-efficient(Da.g)were determined using the one-dimensional dispersion model.A weak magnetic field reduced gas back-mixing to a certain extent,while a moderate field resulted in minimal decrease.The performance of a strong magnetic field varied significantly depending on the operation mode.Under the magnetization-FIRST operation mode,gas back-mixing was significantly reduced.The corresponding Pe and Dag were calculated as～76 and～3.6 x 10-4 m2/s,indicating that the gas flow approached the ideal plug-flow manner.However,when the magnetization-LAST operation mode was used,the strong magnetic field failed to mitigate gas back-mixing.Therefore,the performance of magnetic fields in reducing gas back-mixing depended not only on their intensity but also on their application sequence to the gas flow field.
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    Preparation of pistachio shell-based porous carbon and its adsorption performance for low concentration CO2

    Yuhua ZhangYanmei JinSong LiHong Wu...
    103-114页
    查看更多>>摘要：In this study,high-performance porous carbon for CO2 adsorption was synthesized from pistachio shells and modified with urea to enrich nitrogen content in the porous structure.The effects of activation temperature,KOH-to-carbon ratio,and urea addition on the pore structure and CO2 adsorption capacity of the porous carbon were investigated.Characterization was conducted using N2 adsorption-desorption isotherms,scanning electron microscopy(SEM),X-ray diffraction(XRD),X-ray photoelectron spectros-copy(XPS),and Fourier-transform infrared spectroscopy(FT-1R).Results showed that under preparation conditions of 700℃,KOH-to-carbon ratio of 2,and 15 wt％urea concentration,the synthesized GAC-15-2-700 porous carbon exhibited a maximum specific surface area of 1395 m2/g,micropore volume of 0.505 cm3/g,and N-5 peak area ratio of 65.57％.It achieved a CO2 adsorption capacity of 3.56 mmol/g.Nitrogen functional groups on the porous carbon primarily existed as pyridinic N(N-6),pyrrolic/pyridinic N(N-5),and quaternary N(N-Q),with the enriched micropores and high N-5 content being crucial for CO2 adsorption.
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    Investigations into the flow dynamics of mixed biomass particles in a fluidized bed through Hilbert-Huang transformation and data-driven modelling

    Bojian QiYong YanWenbiao Zhang
    115-123页
    查看更多>>摘要：Flow dynamics of binary particles are investigated to realize the monitoring and optimization of fluidized beds.It is a challenge to accurately classify the mass fraction of mixed biomass,considering the limi-tations of existing techniques.The data collected from an electrostatic sensor array is analyzed.Cross correlation,empirical mode decomposition(EMD),Hilbert-Huang transform(HHT)are applied to pro-cess the signals.Under a higher mass fraction of the wood sawdust,the segregation behavior occurs,and the high energy region of HHT spectrum increases.Furthermore,two data-driven models are trained based on a hybrid wavelet scattering transform and bidirectional long short-term memory(ST-BiLSTM)network and a EMD and BiLSTM(EMD-BiLSTM)network to identify the mass fractions of the mixed biomass,with accuracies of 92％and 99％.The electrostatic sensing combined with the EMD-BiLSTM model is effective to classify the mass fraction of the mixed biomass.
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    Critical state uniqueness of dense granular materials using discrete element method in conjunction with flexible membrane boundary

    Chenglong JiangYajing LiuLingling ZengChengshun Xu...
    124-144页
    查看更多>>摘要：An explanation of the meso-mechanism of sand granular materials for the uniqueness of critical state is presented by means of the discrete element method(DEM)under flexible boundary loading conditions.A series triaxial drainage shear test(DEM simulations),in conjunction with the flexible boundary technique,of were performed for sand samples subjected to various physical states and with different particle size distributions.After carefully investigating the critical status of the results of the numerical calculation,the macroscopic failure modes and shear band evolution of sand,as well as the velocity vector field due to different initial states,were explored and classified.Furthermore,the evaluation rules and discrepancies between overall void ratios of the specimen and local void ratios within the shear band under the critical state were recorded and analyzed.The results proved that a sample with a small void tends to form a shear band,and the rotation of the particles in the non-shear zone is negligible.Conversely,sandy soil with large initial void ratios exhibited limited development of significant shear bands,and the change in void ratios within the shear region and the non-shear area are not significant.Interestingly,the particle-size distribution exerts minimal influence on the evolution rule which the void ratio converges within the shear band and diverges outside the shear region for both multi-stage and single-stage specimens.The void ratio within the shear band and deviator stress ratio tend to exhibit consistently for the same specimen with different initial physical states,thereby distinguishing the critical state.There is a significantly higher change in void ratio within the shear band compared to outside of it,yet it remains stable within a relatively similar range.Additionally,the invariant of the fabric tensor used to describe the critical state characteristics also demonstrates a high degree of consistency within the shear band.These findings strongly indicate that the critical state exists within the shear failure surface and is highly likely to be unique.
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