Advanced Powder Technology最新文献

{"title":"CFD-DEM study on mixing and segregation characteristics of binary particles in a fluidized bed with secondary air","authors":"Yutong Li ,&nbsp;Huibin Xu ,&nbsp;Peijun Guo ,&nbsp;Chi Ma ,&nbsp;Weiyu Wang","doi":"10.1016/j.apt.2025.104909","DOIUrl":"10.1016/j.apt.2025.104909","url":null,"abstract":"<div><div>Secondary air intake has been suggested to be an efficient tar reduction method for fluidized bed biomass gasification. However, the influence mechanism of secondary air intake on the particle motion in the fluidized bed has not been fully understood. A CFD-DEM model was developed to investigate the segregation and mixing characteristics of binary mixture for a fluidized bed with secondary air injection. It was found that the intake of secondary air could change the original bubble pattern in the fluidized bed and form vortexes in the bed, accelerating the circulation rate of particles. The injection of secondary air has the potential to improve the speed and index of mixing, especially in the area above the nozzle plane. For the studied conditions, there is an optimum secondary air to total air ratio (<em>SATR</em>) for the mixing performance of binary mixture in a fluidized bed. On the other hand, the introduction of secondary air and relevant reduction in primary air velocity can lead to a better segregation of the binary mixture below the nozzle plane thus creating two layers with very different mixing/segregation characteristics.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104909"},"PeriodicalIF":4.2,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924758","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":"Tailoring Bismuth Antimonate nanocomposites with barium and calcium for superior electrochemical properties in supercapacitors","authors":"Maalavika S Iyer ,&nbsp;Palanisamy Rajkumar ,&nbsp;Karuppanan Aravinth ,&nbsp;Sankaiya Asaithambi ,&nbsp;Razan A. Alshgari ,&nbsp;Saikh Mohammad ,&nbsp;Sambasivam Sangaraju ,&nbsp;Jinho Kim","doi":"10.1016/j.apt.2025.104917","DOIUrl":"10.1016/j.apt.2025.104917","url":null,"abstract":"<div><div>This study employs a dual substitution strategy on Bismuth Antimonate to improve its performance as an electrode material for supercapacitors. Nanocomposites were synthesized by incorporating Barium (Ba²⁺) and Calcium (Ca²⁺) into Bismuth Antimonate in three different ratios, labeled as B₁C₁BiSO, B₁C₂BiSO, and B₂C₁BiSO. The simple solid-state method used for the preparation yielded nanocomposites with closely packed spherical nanostructures, resulting in a porous architecture that facilitates electrolyte access to the active surface areas. The incorporation of Ba²⁺ and Ca²⁺ creates additional active sites, significantly boosting the electrochemical results of BiSO. Notably, the B₁C₂BiSO electrode achieves a capacitance of 573 F/g at 1 A/g in a three-electrode setup, retaining 88 % of its original capacitance after 5000 cycles—surpassing the performance of other samples. Additionally, we developed an asymmetric supercapacitor device (B₁C₂BiSO||AC) with activated carbon for the negative electrode. This device delivers a capacitance of 117.5 F/g at 1 A/g and maintains 76.25 % capacity retention over 15,000 cycles. This strategy proves to be a capable approach to advance the energy storage capabilities of asymmetric supercapacitor devices.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104917"},"PeriodicalIF":4.2,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924757","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":"Dynamic ball indentation: advancing powder flowability characterization through complete impact dynamics analysis","authors":"Andrea C. Santomaso","doi":"10.1016/j.apt.2025.104914","DOIUrl":"10.1016/j.apt.2025.104914","url":null,"abstract":"<div><div>Predicting how particulate materials behave under applied forces is challenging due to their complex rheology. Flowability—defined as a material’s ability to initiate and sustain motion under stress—is critical in many traditional and emerging industrial applications, such as additive manufacturing. Traditional shear testers are limited in their ability to assess dynamic flow behaviour. The dynamic ball indentation method, which measures the penetration of an indenter into a powder bed, presents a promising alternative. This study enhances the method by tracking the full indentation process to more accurately calculate dynamic hardness. By monitoring the indenter’s trajectory, we obtain detailed data on material flowability, which can provide deeper insights for industrial applications. These insights become even more significant when integrated with information obtained from traditional methods such as shear cell testing.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104914"},"PeriodicalIF":4.2,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917831","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":"Enhanced photocatalytic and antimicrobial properties of titanium doped tin dioxide quantum dots for industrial wastewater treatment","authors":"Maged M. Azzam ,&nbsp;Ammar A. Labib ,&nbsp;Hanan A. Mousa ,&nbsp;Hala T. Handal ,&nbsp;Hoda R. Galal ,&nbsp;Ibrahem A. Ibrahem ,&nbsp;Mona M. Fawzy ,&nbsp;Ahmed Atef El-Beih ,&nbsp;Pravej Alam ,&nbsp;Walied A.A. Mohamed","doi":"10.1016/j.apt.2025.104915","DOIUrl":"10.1016/j.apt.2025.104915","url":null,"abstract":"<div><div>Pure SnO₂ quantum dots (SnQ) and Ti-doped SnO₂ quantum dots (SnQT) were synthesized via a facile one-step hydrothermal method (ESOSH) and characterized their structures and properties (XRD, FTIR, HRTEM, UV-DRS). The SnQ samples (thermally treated at 290 °C and 490 °C as SnQ1 and SnQ2, respectively) had crystalline sizes of ∼ 4 nm and ∼ 9 nm, serving as baseline materials, while titanium incorporation (Sn_0.97Ti_0.03O₂ and Sn_0.93Ti_0.07O₂ for SnQT1 and SnQT2) modulated the SnO₂ lattice without introducing secondary phases. Ti doping substantially enhanced the optical and catalytic performance: SnQT1 exhibited a narrowed band gap (∼3.3 eV) and achieved the highest photocatalytic activity, degrading a model organic dye under simulated sunlight at a rate significantly faster than both the undoped SnQ and the higher-doped SnQT2 catalysts. SnQT1′s dye degradation rate constant was roughly three times that of SnQT2, highlighting the improved charge-carrier separation and extended light absorption due to Ti doping​file-dhfkdtnsslcarpbj5mucvs. SnQT1 was also the most cost-efficient catalyst, with an estimated treatment cost of $25.67 per 1000 m3 of dye solution, outperforming the other compositions in economic analysis. Moreover, Ti-doped samples demonstrated superior antimicrobial efficacy: all catalysts inhibited <em>Bacillus subtilis</em> (Gram-positive) and <em>Candida albicans</em> (yeast), with SnQT1 showing the strongest antibacterial activity. This study underscores that titanium doping in SnO₂ quantum dots yields doped quantum-dot photocatalysts with superior performance, providing valuable insights for designing high-efficiency, sustainable nanomaterials for wastewater treatment and disinfection applications.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104915"},"PeriodicalIF":4.2,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143913141","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":"An iterative scheme for nonlinear collision-induced breakage equation and convergence analysis","authors":"Sanjiv Kumar Bariwal ,&nbsp;Rajesh Kumar","doi":"10.1016/j.apt.2025.104907","DOIUrl":"10.1016/j.apt.2025.104907","url":null,"abstract":"<div><div>The particulate process (Population balance equation (PBE)) has significant applications in milling processes, astrophysics, and the formation of raindrops. A novel PBE is presented, where particle collisions result in one particle fragmenting into multiple pieces (two or more) due to the impact of elastic collisions. This article aspires to offer a semi-analytical solution of a nonlinear collision-induced breakage equation (CBE) using the Temimi and Ansari method (TAM). Firstly, we describe the contraction mapping theorem for the local existence of the solution to CBE. Then, the convergence analysis of the TAM iterative solution is exhibited under some physical assumptions on the collision kernels. In addition to this, the maximum error bound is calculated for the finite term truncated solution. In order to show the accuracy and efficiency of the proposed method, we have numerically simulated the finite-term approximate density functions and moments with the available analytical results at various time stages considering several numerical examples. In all numerical cases, TAM yields closed-form solutions for the zeroth and first moments. Furthermore, it is noted that the TAM consumes less computing time despite producing results with precision comparable to the Homotopy Perturbation method <span><span>[1]</span></span>. Finally, it has been shown that the proposed method provides the first-order convergence rate.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917597","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":"Spectroscopic characteristics and characterizations of CaAl12O19-based phosphors for anti-counterfeiting applications and performance predictions","authors":"Shifa Wang ,&nbsp;Yuanyuan Zhang ,&nbsp;Yujia Jin ,&nbsp;Xinmiao Yu ,&nbsp;Xianlun Yu ,&nbsp;Xinxin Zhao ,&nbsp;Huajing Gao ,&nbsp;Xianju Zhou ,&nbsp;Dengfeng Li ,&nbsp;Hua Yang ,&nbsp;Leiming Fang ,&nbsp;Asad Syed","doi":"10.1016/j.apt.2025.104918","DOIUrl":"10.1016/j.apt.2025.104918","url":null,"abstract":"<div><div>The CaAl₁₂O₁₉/ZnO (CAO/ZO), CaAl₁₂O₁₉/MoS₂ (CAO/MS), and CaAl₁₂O₁₉/LiPF₆ (CAO/LPF) phosphors with different mass percentages were synthesized. The CAO/ZO and CAO/MS phosphors contained no other impurities except the target products, but CAO/LPF phosphor also contained LiF and Li_xPO_yF_z impurities due to the high temperature thermal decomposition of LPF. The fine particles of ZO, MS or LPF were uniformly attached to the surface of CAO, forming a special interface contact. The coupling CAO with ZO and MS significantly reduces the optical band gap (Eg) value of CAO, while LPF coupling CAO does not affect the Eg value of host lattice. The CAO/ZO, CAO/MS, and CAO/LPF phosphors were shown to be sky blue, blue, and dark blue, respectively, during the photoluminescence characterization, which resulted in the emission peaks that were predominantly concentrated at 487, 467, and 459 nm, respectively. An intelligent algorithm model was used to predict the photoluminescence properties of CAO-based phosphors, and it demonstrated exceptional predictive ability. The CAO/ZO, CAO/MS and CAO/LPF phosphors exhibit different photoluminescence properties due to the radiative recombination of localized excitons, type I band arrangement and impurity promoting electron and hole recombination, respectively. Photoluminescence applications show that the CAO-based phosphors demonstrate multimodal fluorescence anti-counterfeiting under different excitation wavelengths.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104918"},"PeriodicalIF":4.2,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143913142","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":"A Voronoi tessellation-based CFD-DEM porosity model for fluidized bed modelling","authors":"Hanqiao Che ,&nbsp;Yuanhe Yue ,&nbsp;Deyun Liu ,&nbsp;Shuai Wang","doi":"10.1016/j.apt.2025.104913","DOIUrl":"10.1016/j.apt.2025.104913","url":null,"abstract":"<div><div>The porosity model is a critical component of CFD-DEM calculations, particularly in scenarios where the CFD mesh size cannot be adjusted flexibly. Voronoi tessellation has been demonstrated as an efficient method for estimating the porosity of individual particles. This study introduces a flexible implementation of the Voronoi porosity model, extending its application to broader chemical engineering scenarios and enabling large-scale computations for irregular devices. The model leverages CFD mesh cell nodes and the functions in Voro++ package, addressing previous limitations with point cloud generation. Evaluations across various particle size distributions and fluidised beds show that the model generates smooth porosity fields, remains independent of mesh grid density, and significantly improves drag force calculation accuracy in polydisperse particle systems. Although computational costs may rise due to frequent Voronoi tessellation updates, reducing the update frequency can help reduce these costs.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104913"},"PeriodicalIF":4.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907033","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":"Gas and liquid state ammonia boosted in the hydrolysis of secondary aluminum dross","authors":"Yunzi Xin ,&nbsp;Yuki Oishi ,&nbsp;Kunihiko Kato ,&nbsp;Yuping Xu ,&nbsp;Takashi Shirai","doi":"10.1016/j.apt.2025.104910","DOIUrl":"10.1016/j.apt.2025.104910","url":null,"abstract":"<div><div>This study elucidates the behavior of gas and liquid state ammonia generation in both short-term and long-term hydrolysis of secondary aluminum dross (SAD) powders, with detailed characterizations of the chemical structure and surface chemical state change of SAD particles during the hydrolysis reaction. Altered aluminum hydroxides, boehmite, bayerite, and gibbsite, were formed selectively on the surface of SAD in prolonged hydrolysis, which play principal roles in the progress of the hydrolysis reaction and generation of gas and liquid state ammonia. The influence of the reaction temperature on the hydrolysis of SAD is also clarified in advance, which demonstrates a distinguished reaction dynamics and mechanism. It was found that the gasification of dissolved liquid state ammonia is a predominant process, instead of a promoted hydrolysis of SAD for enhanced gas state ammonia production. Moreover, a novel and facile approach is introduced for boosting both gas and liquid state ammonia via beads mill-assisted hydrolysis of SAD powders. During beads mill process, the coverage of aluminum hydroxides on SAD was hindered via the mechanical breaking of particle surface. Continuous hydrolysis was then achieved through the further promoted reaction between water and the exposed new surface of SAD, which significantly enhances ammonia generation.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104910"},"PeriodicalIF":4.2,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143907034","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":"Erratum to “Role of ultraviolet modification in enrichment and upgrading of graphite ores via triboelectric separation” [Adv. Powder Technol. 36(6) (2025) 104870]","authors":"Jingfeng He,&nbsp;Zilin Zhang,&nbsp;Lixiang Fu,&nbsp;Helang Xu,&nbsp;Lingtao Zhu,&nbsp;Bin Yang","doi":"10.1016/j.apt.2025.104911","DOIUrl":"10.1016/j.apt.2025.104911","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104911"},"PeriodicalIF":4.2,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894925","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":"Synthesis of spherical particles of ceria-zirconia solid solution by microwave-emulsion method","authors":"Miki Inada,&nbsp;Junichi Hojo","doi":"10.1016/j.apt.2025.104904","DOIUrl":"10.1016/j.apt.2025.104904","url":null,"abstract":"<div><div>Microwave-emulsion method has been explored for synthesis of spherical oxide particles with combination of rapid and selective heating by microwave and spherical shape control by emulsion method. The CeO₂-ZrO₂ solid solution particles were prepared by heating of W/O emulsions under microwave irradiation followed by calcination. Oil phase was n-hexane including tetraglycerin condensed ricinolate and polysorbate 80 as emulsifier, and water phase included (NH₄)₂Ce(NO₃)₆ and ZrOCl₂ as metal source and (NH₄)₂C₄H₄O₆ as hydrolysis agent. As-produced powder exhibited cubic phase at Ce/Zr ≥ 5/5 and amorphous phase at Ce/Zr ≤ 3/7. After calcination, the lattice constant of cubic CeO₂ decreased and tetragonal and monoclinic phases of ZrO₂ appeared at large Zr content. Pure CeO₂ was agglomerates of fine particles and spherical particles with a size of 0.5–1 μm were obtained by addition of ZrO₂, indicating that the spherical particles were the mixture of crystalline CeO₂ and amorphous ZrO₂. The oxygen storage capacity increased with rising calcination temperature due to the formation of solid solution but decreased at high temperature due to decrease in surface area.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 6","pages":"Article 104904"},"PeriodicalIF":4.2,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887980","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}