Advanced Powder Technology最新文献

{"title":"Study on the flame propagation characteristics and mechanism of polyethylene dust deflagration suppressed by basic carbonates","authors":"Jin Han ,&nbsp;Fei Wang ,&nbsp;Jinshe Chen ,&nbsp;Yansong Zhang ,&nbsp;Shengjing Dongye ,&nbsp;Haiyan Chen ,&nbsp;Yang Zhang ,&nbsp;Yuzhen Zhu","doi":"10.1016/j.apt.2025.104884","DOIUrl":"10.1016/j.apt.2025.104884","url":null,"abstract":"<div><div>This paper investigates the potential of basic copper carbonate (BCC) and basic zinc carbonate (BZC) as explosion suppressants for polyethylene (PE) dust deflagration, aiming to improve accident prevention and control. Specifically, this study examines the inhibitory effects and mechanisms of these substances on the flame propagation of PE dust. The effects of the two suppressants on the speed, time, and acceleration of PE flame propagation were compared through Hartmann tube experiments. The findings demonstrate that increasing the quantity of suppressant markedly reduces the rate of flame propagation. This effect is particularly evident when 60 wt% of BZC is introduced, resulting in near-complete suppression. BZC shows a stronger suppression effect compared to BCC, primarily attributable to its lower decomposition temperature, which facilitates earlier release of inert gases during the deflagration process, thereby inhibiting flame spread. Further analysis of the explosion products using FTIR and SEM revealed that the suppressants achieve flame inhibition through a dual mechanism of physical cooling and chemical free radical scavenging. Additionally, numerical simulations using CHEMKIN PRO demonstrated that the inert gases produced by the decomposition of BZC can effectively capture H and OH free radicals generated during combustion, reduce flame temperature, and inhibit chain reactions.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104884"},"PeriodicalIF":4.2,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deformation and breakup of droplets of stabilized coal slime fuels interacting with an air jet","authors":"O.V. Vysokomornaya ,&nbsp;R.S. Volkov ,&nbsp;G.V. Kuznetsov ,&nbsp;P.A. Strizhak","doi":"10.1016/j.apt.2025.104887","DOIUrl":"10.1016/j.apt.2025.104887","url":null,"abstract":"<div><div>This research presents the experimental data on the influence of stabilizing additives on deformation and fragmentation behavior of waste-derived slurry droplets during their interaction with an air jet. The average radii and number of child droplets formed as a result of droplet breakup were recorded. The influence of the air jet velocity and the diameter of the parent droplet on the average radius and the number of secondary droplets was determined. The experiments demonstrated a dynamic change in the number and average radii of secondary droplets for different relative velocities of the parent slurry droplets. When adding a stabilizing additive to coal-water slurry, the number of secondary droplets decreased several times. Experimental data were analyzed using dimensionless criteria and deriving equations to predict the breakup characteristics of droplets of stabilized fuels over a wide range of air jet velocity. Maps of modes of droplet deformation and breakup were developed, plotted in coordinate systems using Weber, Reynolds, Ohnesorge and capillarity numbers.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104887"},"PeriodicalIF":4.2,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of ball mill grinding kinetics for materials with uncommon breakage characteristics","authors":"V.K. Gupta","doi":"10.1016/j.apt.2025.104889","DOIUrl":"10.1016/j.apt.2025.104889","url":null,"abstract":"<div><div>Generally, a specific breakage rate function of power-law type and a breakage distribution function that is a weighted sum of two Gaudin-Schumann distributions are adequate for characterizing the breakage properties of materials. In such cases, after a certain period of grinding, a self-similar size distribution regime develops, where the particle size distributions collapse onto a single curve when plotted using particle size scaled by the mean size. The Kapur mean particle size-grinding time relationship is valid in this regime. However, in the case of two samples of dolomite and hematite, the above-mentioned functional form for the breakage distribution function gave a negative value for the fraction reporting to the next finer size interval. After trying several different functional forms, we used a weighted difference of two Gaudin-Schumann distributions instead of the sum. This approach gave good results. It was found that the breakage distribution function curves were concave downwards instead of concave upwards as is generally the case, a relatively small fraction of the broken material reported to the next finer size interval, and the specific breakage rate function was particle size independent. The Kapur mean size-grinding time relationship was valid in the self-similar size distribution regime, and it supported the size independence of the specific breakage rate function. However, the particle size scale factor was not the mean size. It was the mean size squared for dolomite and the mean size cube for hematite. Simulated size distribution data showed that the particle size scale factor varies with the material breakage characteristics.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104889"},"PeriodicalIF":4.2,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of heterogeneous particles on mechanical behavior and crushing characteristics: Experiment and numerical simulation","authors":"Xingxin Duan ,&nbsp;Chuhan Huang ,&nbsp;Yulan Tang ,&nbsp;Chuanfeng Fang ,&nbsp;Zhihong Nie ,&nbsp;Yufei Huang","doi":"10.1016/j.apt.2025.104900","DOIUrl":"10.1016/j.apt.2025.104900","url":null,"abstract":"<div><div>Particle crushing usually occurs in granular materials and affects their structural and mechanical properties. To investigate the mechanical behavior and crushing characteristics of heterogeneous particles, this study conducts both laboratory tests and numerical simulations for a macro-microscopic analysis of the heterogeneous particles. The laboratory tests results demonstrate that the single particle crushing strength and crushing pattern have obvious size effect. In numerical simulations, the heterogeneous crushable particle model was constructed by using Gaussian distribution and Voronoi tessellation, and the degree of heterogeneity (<em>δ</em>) is defined as the ratio of the standard deviation to the expected value. The numerical findings demonstrate that the size effect of crushing strength is mainly attributed to heterogeneity. The degree of heterogeneity weakens the particle crushing strength. As the <em>δ</em> value increases, the force–displacement curve of the particle exhibits stronger nonlinear characteristics, and the macroscopic failure pattern changes from brittle failure to ductile failure. Additionally, with the increase in <em>δ</em>, the deformation coordination between child particles decreases, which leads to enhanced local stress concentration, causing a reduction in the crack initiation stress. This change causes the crack propagation mode to evolve from a sharp angle to a blunt angle, and ultimately determines the crushing strength and crushing pattern of particles.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104900"},"PeriodicalIF":4.2,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile sonochemical preparation of γ-AlOOH nanopowder via corrosion and erosion of Al coarse particles","authors":"Toshiki Yamanaka,&nbsp;Yamato Hayashi,&nbsp;Hirotsugu Takizawa","doi":"10.1016/j.apt.2025.104890","DOIUrl":"10.1016/j.apt.2025.104890","url":null,"abstract":"<div><div>Boehmite (γ-AlOOH) nanopowders were facilely synthesized at room temperature by sonochemical corrosion and erosion of Al particles. After 24 h of sonication in N₂H₄·H₂O, Al powders were completely converted into γ-AlOOH nanopowders. The obtained γ-AlOOH particles had an average diameter of 158.2 nm in 0.1 M NaOH aqueous solution, and a specific surface area of 360.9 m²/g. In contrast, γ-AlOOH powders were not obtained after magnetic stirring of Al powders in N₂H₄·H₂O at 30 °C, indicating that sonochemical effects (hotspots, microjets and shock waves) significantly facilitated the corrosion reaction and surface erosion of Al, resulting in the formation of γ-AlOOH nanocrystals. The isoelectric point and adsorption rate of γ-AlOOH toward Congo red (CR) were also investigated. γ-AlOOH nanopowders exhibited an adsorption capacity of 100.0 mg/g after 60 min of stirring with a 100 mg/L CR solution at pH 8.70. The sonochemical process involving Al powders and N₂H₄·H₂O is preferable synthetic route for preparing γ-AlOOH nanopowders due to its simplicity.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104890"},"PeriodicalIF":4.2,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the corresponding relationship between the seepage range and inhibition range of composite long acting blocking liquid in coal body","authors":"Wenlin Li ,&nbsp;Lulu Sun ,&nbsp;Weimin Cheng ,&nbsp;Gang Wang ,&nbsp;Qiming Huang ,&nbsp;Guansheng Qi","doi":"10.1016/j.apt.2025.104897","DOIUrl":"10.1016/j.apt.2025.104897","url":null,"abstract":"<div><div>To address the technical challenge of difficulty in visually monitoring the seepage range and quantitatively determining the inhibition range during the application of in-situ inhibition processes, a fluorescence tracing technique was employed to conduct a visualization monitoring experiment of the seepage range for in-situ inhibition at the Dongtan Coal Mine 6303 working face, and to establish the corresponding relationship between the seepage range and the inhibition range. This study conducted on-site application of in-situ inhibition processes at the Dongtan Coal Mine 63下03 working face. Coal samples were collected from monitoring points 1#, 2#, and 3#, which were drilled perpendicular to the coal wall, based on the actual fluid injection conditions on-site. These samples were then taken to the laboratory for programmed temperature rise experiments and fluorescence spectrophotometry experiments. The corresponding relationship between the seepage range and the inhibition range was constructed using the inhibition rates and fluorescence intensities obtained from the experiments. The results indicate that the inhibition rates at monitoring points 1#, 2#, and 3# exhibit similar trends, showing an initial increase followed by a decrease with increasing drilling depth. The maximum inhibition effect is achieved at a depth of 8 m for all three points. Monitoring point 1# has an inhibitory effect at depths of 8–16 m, while point 2# shows effectiveness at 8–14 m. No inhibitory effect was observed in the samples taken from monitoring point 3#. By fitting the relationship between the inhibition rate and fluorescence intensity, a relationship equation based on full-scale fluorescence intensity and inhibition rate was obtained, determining the seepage range and inhibition range of the inhibitory fluid within the coal body and their corresponding relationship, which plays an important guiding role in the efficient implementation of coal seam fluid injection.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104897"},"PeriodicalIF":4.2,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of hydrophobic drug microcapsules via an intensified supercritical extraction of emulsion method: Phase behavior investigation and emulsion formula regulation","authors":"Fengxia Liu,&nbsp;Renqing Su,&nbsp;Yufei Li,&nbsp;Yawen Ji","doi":"10.1016/j.apt.2025.104893","DOIUrl":"10.1016/j.apt.2025.104893","url":null,"abstract":"<div><div>Some hydrophobic natural drugs with high added values are promising in clinical applications, while their poor water-solubility becomes a major restriction for the bioavailability. To overcome this problem, the size-reducing strategy is a favorable approach. Herein, model paclitaxel (PTX)@poly (lactide-co-glycolic acid) (PLGA) microcapsules are fabricated by an intensified supercritical extraction of emulsion (SFEE) method. The phase behaviors of carbon dioxide (CO₂)/emulsion system during extraction are investigated to interpret the effects of operation parameters on the extraction. Besides, the emulsion formulas on microcapsule properties are examined experimentally as well. The results indicate that supercritical parameters above the mixture critical point (&gt; 8 MPa at 313 K, for example) enables the great phase mixing of oil phase and CO₂, thus the effectiveness of emulsion extraction can be guaranteed. Besides, the PLGA mass concentration (<em>c</em>_PLGA) and water/oil ratio variations are also proved to favorably adjust the size, encapsulation efficiency, and drug loading of microcapsules.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104893"},"PeriodicalIF":4.2,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Subgrid scale gas-particle stress model-based simulation of dense particle flows in a bubbling fluidized bed","authors":"Yang Liu ,&nbsp;Zhao Yan ,&nbsp;Guohui Li ,&nbsp;Jiatong Liu ,&nbsp;Xue Liu ,&nbsp;Lixing Zhou","doi":"10.1016/j.apt.2025.104885","DOIUrl":"10.1016/j.apt.2025.104885","url":null,"abstract":"<div><div>A novelty gas-particle stress model at subgrid scale level is proposed to consider the effect of gas turbulence on particle motions. The anisotropic characteristics of interaction between gas and particles are described by using a second-order moment model, the modeling of particle–particle collision is based on the kinetic theory of granular flow and the four-way coupling strategy is combined. A large eddy simulation is established to predict particles and bubble movements in a small-scale fluidized bed, simulation results are well agreed with the experimental data and the proposed model is validated. Results show that bubblelike granular temperature is greater than smaller-scale particle granular temperature and the flow patterns of two-phase turbulence are heterogeneously. Bubble motions have a great effect on particle dynamics. The distributions of axial and horizontal velocities of particles at center, middle and wall regions are approaching the normal distributions. The largest dominant frequency of particle concentration is 34.2 Hz at central region of lower bed height, approximately 1.3 times larger than that of wall region. Maximum ratios of wall to those central values are 8.3 for axial particle velocities.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104885"},"PeriodicalIF":4.2,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inside Front Cover (Aims & Scope, Editors)","authors":"","doi":"10.1016/S0921-8831(25)00099-8","DOIUrl":"10.1016/S0921-8831(25)00099-8","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 5","pages":"Article 104878"},"PeriodicalIF":4.2,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Full title (Editorial Board Members)","authors":"","doi":"10.1016/S0921-8831(25)00100-1","DOIUrl":"10.1016/S0921-8831(25)00100-1","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 5","pages":"Article 104879"},"PeriodicalIF":4.2,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}