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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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    Process intensification for the synthesis and purification of battery-grade Li2CO3 with microfluidics

    Haodu LiJie ZhangLin DaiLe Du...
    106-117页
    查看更多>>摘要：Battery-grade lithium carbonate(Li2CO3)with a purity of higher than 99.5 wt％is of great importance as a high value-added lithium salt.However,influences of different reaction systems and process control on product purity remain unclear.Herein,a membrane dispersion microreactor was used to enhance the mass transfer of preparation and purification processes in homogeneous and heterogeneous system.Synthetic systems of Na2CO3-LiCl,NH4HCO3-LiCl,and NH3 H2O-CO2-LiCl,CO2 purification based on carbonation and decomposition were adopted.The Li2CO3 purity was increased by the improvement of mixing performance.The carbonation time was reduced by 62.5％and 58.3％for the NH3·H2O-CO2 and CO2 purification systems,respectively.In the two ammonia-based systems,Li2CO3 particles with a purity of 99.7-99.8 wt％were one-step prepared with a size of 3-5 μm,which also met the requirement of the battery-grade standard.The purity was further increased to 99.9 wt％by CO2 purification and LiHCO3 decomposition.The investigation could provide a feasible alternative for the controllable preparation of battery-grade Li2CO3 in one or multiple steps.
      原文链接:
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    Macro-microscopic dynamic characteristics of the ballast bed induced by the variation of moisture content

    Shuchen WangLonglong FuYongjia QiuHaonan Xi...
    118-127页
    查看更多>>摘要：Due to the excellent drainage performance of the ballast,existing studies mainly focus on the dynamic response of ballast under field capacity or saturation.Attention has rarely been paid to dynamic changes in moisture content and potential influences.In this article,we firstly conduct a model test to determine the variation of ballast moisture content under artificial rainfall.After that,a full-scale model test with cyclic loading is carried out to study the effect of moisture content variation on the macro-microscopic response of the ballast bed,where several wireless particle sensors are installed to obtain ballast motion characteristics at strategic locations.The results show that the moisture content increases gradually and stabilizes at a flat peak under rainfall,despite the excellent drainage performance of ballast bed.After halting rainfall,the moisture content drops back to field capacity,which indicates dynamic flowing surface water on ballast particles under rainfall.Such flowing surface water brings changes to the original dynamic equilibrium of ballast bed:macroscopically,the deformation rate of stabilized ballast bed in-creases significantly,reaching a local peak under field capacity;microscopically,the x-and z-angular accelerations of the ballast show positive correlation with rainfall intensity.The multiscale responses indicate that field capacity is a critical moisture content.
      原文链接:
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    Numerical simulation and parameter optimization of Coriolis force scale measurement process based on DEM

    Haiting LiuYong YangXiangliang WangJiewen Deng...
    128-139页
    查看更多>>摘要：The Coriolis force method is a recently developed and highly regarded direct measurement technique that enables high-precision measurement of bulk materials.The operational parameters and variations thereof directly influence the measurement accuracy of the equipment.In this study,a measurement correction coefficient is introduced to improve the calculation method for mass flow rate of the mate-rials.The DEM is employed to simulate the motion of particle groups within the Coriolis force scale under different parameters,and the effects of various structural and operational parameters on the measure-ment results are compared.The research findings indicate that a lower rotational speed leads to more stable instantaneous measurement results,although the measurement error is relatively large.When the rotational speed exceeds 300 rpm,the measurement error remains within 15％.For materials with a radius of 1-2 mm,the variation range of precision error is approximately 0.4％.Among the structural parameters,the radius of the measurement wheel has the most significant impact on the measurement results,wherein a larger measurement wheel radius corresponds to a smaller measurement error.The horizontal angle of the blades follows as the next influential parameter,with a clockwise rotation and a horizontal angle of 30° resulting in a measurement error below 2％.
      原文链接:
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    Characteristics of bioaerosols under high-ozone periods,haze episodes,dust storms,and normal days in Xi'an,China

    Yiming YangLiu YangXiaoyan HuZhenxing Shen...
    140-148页
    查看更多>>摘要：The characteristics of bioaerosols and their effects on human beings'health have become a major public concern in the recent years.This study compared the characteristics of bioaerosols under different types of pollution(high-ozone[HO]episodes,haze episodes,and dust storms[DSs]),with those of bioaerosols on normal days(NDs)in Xi'an,China.The concentrations,diurnal variations,and size distribution of bacteria,fungi,and total airborne microbes(TAMs)were investigated.The results showed that the bacterial and fungal concentrations were the highest during DSs and on NDs,reaching 425.2 and 956.9 colony-forming units/m3,respectively.The concentration of TAMs was the highest during HO episodes,reaching 10.7 x 106 cells/m3,which was significantly higher than that during the other events.The maximum concentrations of bacteria and fungi during HO episodes were observed in the morning,while they appeared separately in the morning and evening during haze episodes.Bacteria and TAMs during DSs reached peak concentrations in the morning and evening,which is opposite to the particulate matter(PM)distribution pattern.On NDs,temperature and relative humidity had significant effects on bioaerosols.The size distributions of airborne bacteria exhibited bimodal patterns,whereas unimodal distributions were observed for fungi.Fungi mainly attached in fine particles(＜2.1 μm)with proportions of 67.4％and 60.5％during haze episodes and DSs,respectively,which means that fungi were easily penetrated into the human respiratory system.The evaluation of influence factors revealed that PM2.5 and PM10 had negative effects on fungal concentration during DSs,and ozone concentration and tem-perature were inversely correlated with fungal concentration during HO episodes.These results provide valuable reference data for elucidating the formation and evolution of bioaerosols under different types of pollution.
      原文链接:
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    Numerical investigation of non-uniform temperature fields for proppant and fluid phases in supercritical CO2 fracturing

    Boyu LiuJun Yao
    149-163页
    查看更多>>摘要：The non-uniform temperature distribution in supercritical CO2(Sc-CO2)fracturing influences the density,viscosity,and volume expansion or shrinkage rate of Sc-CO2,impacting proppant migration.This study presents a coupled computational fluid dynamics-discrete element method and heat transfer model to examine the effects of proppant bed shape and the heat transfers of proppant-wall,proppant-fluid,and fluid-wall on the fluid and proppant temperature fields.The Sc-CO2 volume expansion is assessed under various temperature conditions by evaluating the volume-averaged Sc-CO2 density.Several factors,including proppant size,shape,thermal conductivity,concentration,temperature difference,and injec-tion velocity,are carefully analyzed to elucidate their impacts.The findings elucidate the existence of four distinct zones in the fluid temperature field.Each zone exhibits different magnitudes of temperature change under diverse conditions and undergoes dynamic transformations with the development of the proppant bed.The fluid-wall heat transfer and the fluid temperatures in Zones C and D are significantly subject to the fluid injection velocity(governing the heating duration),the temperature difference be-tween fluid and formation(impacting the magnitude of heat flux),and the proppant bed shape(con-trolling the effective heating area).Additionally,the proppant-wall and proppant-fluid heat transfers determine the temperatures of both the proppant bed and the fluid within Zone B,showing a strong correlation with proppant thermal conductivity,proppant size,injection velocity,and temperature dif-ference.The proposed coupled model provides valuable insights into the temperature distributions and flow behaviors of temperature-dependent fracturing fluids and proppants.
      原文链接:
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    Study of the blocking mechanism in gravel packing based on CFD-DEM

    Fucheng DengLei WenGang LiBaitao Fan...
    164-178页
    查看更多>>摘要：Gravel packing sand control(GPSC),as the optimization of mechanical sand control technology,is widely used in the deep water completion and sand control of loose sandstone heavy oil reservoirs and highly argillaceous.To explore the blocking mechanism of GPSC,the influence of its structural parameters on the blocking of GPSC is investigated.This paper establishes a particle element model based on compu-tational fluid dynamics-discrete element method coupling using the discrete element method and es-tablishes a fluid flow model combined with computational fluid dynamics to realize their full coupling solution.And sand control experiments were carried out using a micro visual sand control simulation device to verify the blocking model.The blocking mechanism is analyzed from the microscopic point of view,and then,the influence of sand control structure parameters on the blocking in GPSC design is evaluated.The results show the following:(1)the blocking process of GPSC can be divided into three stages:an initial stage,sand accumulation stage,and equilibrium stage.(2)There are two main types of gravel packing blockage.The first type of blocking is blocking on the surface of the gravel layer.Sand particles on the surface of gravel layer mainly exist in the form of large particle size blocking gravel pores and sand particles bridging each other.The second type of blockage is the blockage inside the gravel layer.Sand particles mainly exist in the form of internal mud cakes and adsorption on gravels inside the gravel layer.(3)To ensure the sand control performance of the gravel layer,the gravel layer thickness is designed between 23 and 28 mm.The displacement or pressure of the on-site packing pump should be increased to ensure that the gravel layer packing solidity ranges between 59％and 62％.In the design of GPSC,it should be ensured that the median particle size of gravel is 5-6 times the median particle size of sand.This study provides an effective technical reference for the design of gravel structural parameters in on-site gravel packing completion sand control.
      原文链接:
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    Numerical simulation on gas-solid flow during circulating fluidized roasting of bauxite by a computational particle fluid dynamics method

    Chengming XieRongbin LiQijin WeiFengqin Liu...
    179-188页
    查看更多>>摘要：A full-cycle numerical simulation of a circulating fluidized bed(CFB)by the use of the computational particle fluid dynamics(CPFD)method has been developed.The effects of the presence or absence of the secondary air,different secondary air positions,and different secondary air ratios on the gas-solid flow characteristics were explored.The results show that the presence of the secondary air makes a core-annular structure of the velocity distribution of particles in the fluidized bed,which enhances the uni-formity of particles'distribution and the stability of fluidization.The position and the ratio of the sec-ondary air have a significant impact on the particle distribution,particle flow rate,and gas flow rate in the fluidized bed.When the secondary air position and ratio are optimal,the particles,particle flow rate,and air flow rate in the CFB are evenly distributed,the gas-solid flow state is good,and the CFB can operate stably.
      原文链接:
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    Optimization of variables and assessment of in-vitro and in-vivo antihyperlipidemic activity of Eudragit RS nanoparticles containing simvastatin

    Bina GidwaniVishal JainVeenu JoshiRavindra Kumar Pandey...
    189-198页
    查看更多>>摘要：Simvastatin,a BCS class Ⅱ drug,is associated with poor aqueous solubility,first-pass metabolism and short half-life.In the present work,nanoparticles were prepared and evaluated.Optimization of formulation and process parameters was done through the use of independent and dependent variables.Preliminary studies were done to determine suitable range of the concentration of Eudragit polymer(10％-30％)and the ratio of drug to polymer(1:1 to 1:5)for the formation of nanoparticles by emulsification and a solvent evaporation technique.Results revealed that the mean size of nanoparticles was affected by stirring speed from 5000 RPM,8000 RPM,and 12000 RPM.The results of increase in association effi-ciency and percent yield with increase in amount of drug from 100 mg,150 mg,and 200 mg in selected range were observed.In-vitro release studies showed that two formulations possess highest initial burst and slow sustained drug release.There was 2.93-fold decrease in total cholesterol and 3.27-fold increases in triglyceride level during in-vivo study.
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    Surfactant-assisted crystallization of lysozyme and its mechanism

    Yujie SongRongfei RenMin SuZhihan Liang...
    199-208页
    查看更多>>摘要：Surfactants were used to assist in the crystallization of lysozyme.Three types of surfactants with different structures(sodium dodecyl sulfate,cetyltrimethylammonium bromide,or betaine hydrochlo-ride[BH])were used.The study indicated that three surfactants were all capable of shortening the crystallization induction time of lysozyme,with BH inducing the shortest crystallization induction time(t=1 min)and the largest crystal size(37 μm).The molecular interactions among each of the three surfactants aforementioned and lysozyme were also investigated by simulations.It was found that hydrogen bonding dominantly acted between the carboxyl structure of the surfactant BH and the lysozyme,which produced the most favorable conformation for the self-assembly of lysozyme(promote lysozyme orderly aggregation and shorten the crystallization induction time).On this basis,the mech-anism of surfactant-promoted lysozyme crystallization was proposed.
      原文链接:
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    Effect of succinic acid on morphology transformation of the anhydrous magnesium carbonate particles prepared by magnesium chloride hexahydrate and urea

    Song LiuGuojun ChengZhongfeng Tang
    209-217页
    查看更多>>摘要：The homogeneous and controllable morphology of anhydrous magnesium carbonate(MgCO3)particles with excellent properties is difficult to obtain because of a variety of synthetic factors.The effect of succinic acid as a crystal modifier on the particle morphology transformation of anhydrous MgCO3 was investigated by the hydrothermal method.The effect of the addition of succinic acid on the particles was similar to that of temperature change.The morphology of particles with a folded diamond-like shape was gradually uniform,and the particle size was between 3.3 and 7.5 μm.Anhydrous MgCO3 particles pre-pared at pH 9 could easily agglomerate,and the average particle size increased from diamond-like to cube-like as the reaction time increased.The interaction between succinic acid and magnesium ions at different concentrations was the main factor responsible for the morphological changes.The pH,tem-perature,and time affected the molecular motion rate and crystal growth.
      原文链接:
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