Advanced Powder Technology最新文献

{"title":"Influence of cation species and pH on yield stress, floc formation, and sedimentation behavior in silica particle suspensions","authors":"Mayuna Oka ,&nbsp;Tatsuhiko Murakami ,&nbsp;Yoshiyuki Imai ,&nbsp;Haruto Ikeda ,&nbsp;Toru Ishigami ,&nbsp;Kunihiro Fukui ,&nbsp;Tomonori Fukasawa","doi":"10.1016/j.apt.2025.105013","DOIUrl":"10.1016/j.apt.2025.105013","url":null,"abstract":"<div><div>This study examined how coagulation conditions—electrolyte concentration, cation species, and pH—influence yield behavior, sedimentation dynamics, and floc formation in amorphous silica suspensions. Zeta potential measurements showed that less hydrated cations adsorbed more strongly onto silica surfaces, reducing double-layer repulsion. Yield stress data indicated stronger interparticle attraction at high pH with poorly hydrated cations due to enhanced surface adsorption. Interestingly, in suspensions containing guanidinium (Gdm⁺)—the least hydrated cation—the yield stress decreased at concentrations above 2.0 M, implying that the large size of Gdm⁺ may cause steric repulsion at high concentrations, reducing the yield stress. Sedimentation tests showed that both sediment layer compression and floc structure were affected by pH and cation identity. Within the pH range of 4–8, sedimentation behavior aligned with yield stress trends, though deviations appeared at pH 10. Floc diameter measurements supported these findings, showing that larger flocs formed under conditions of stronger interparticle attraction, consistent with the yield stress data. Overall, cation hydration and pH strongly influenced interparticle forces and suspension behavior. These findings emphasize the significance of ion-specific effects in colloidal systems and provide insight into the rheological and stability properties of silica suspensions.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105013"},"PeriodicalIF":4.2,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721830","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":"ZIF-67 decorated wood derived carbon host dual-stage-order microchannels for self-supporting cathode of high-performance lithium sulfur batteries","authors":"Bingyan Li ,&nbsp;Yinglin Yan ,&nbsp;Xingsheng Zhang ,&nbsp;Bing Ren ,&nbsp;Zhiying Meng ,&nbsp;Rongfu Xu ,&nbsp;Yiming Zou ,&nbsp;Qijiu Deng ,&nbsp;Wei Yu ,&nbsp;Xianhui Wang ,&nbsp;Nana Zhao ,&nbsp;Lisheng Zhong ,&nbsp;Rong Yang ,&nbsp;Yunhua Xu","doi":"10.1016/j.apt.2025.105016","DOIUrl":"10.1016/j.apt.2025.105016","url":null,"abstract":"<div><div>Although lithium-sulfur (Li-S) batteries have broad market prospects owing to their high theoretical energy density and potential cost-effectiveness, their practical application still faces serious shuttle effects of polysulfides (LiPSs) and sluggish redox kinetics. In this study, a cobalt-organic framework, ZIF-67, decorated balsa wood matrix (ZIF-67/BW) was utilized to prepare a cobalt-nitrogen-encapsulated carbon host (Co-N/CBW) with dual-stage-order microchannels for self-standing cathodes in high-performance Li-S batteries. The first-stage-order microchannels inherited from wood provided fast transmission paths for electrolyte. The ZIF-67 derived Co-N carbon particles with the second-stage-order microchannels provided strong chemical adsorption and enhanced conversion kinetics for LiPSs. Owing to these advantages, the Co-N/CBW/Li₂S₈ cathode exhibited a high initial discharge specific capacity of 1213.1 mAh g⁻¹ at 0.1 C and good cycling stability at 0.5 C (590 mAh g⁻¹ after 200 cycles). By increasing the sulfur loading to 5.97 mg cm⁻², the cathode maintained a remarkable area-specific capacity (3.42 mAh cm⁻²) after 100 cycles. This work proposes a strategy for the cooperation of the catalyst and matrix, providing more possibilities for the development of Li-S batteries.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105016"},"PeriodicalIF":4.2,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144721808","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":"Formation and breakage of chalcopyrite aggregates produced by anionic polyacrylamides: Influence of polymer molecular weight and shear conditions","authors":"Regina B.D. de Medeiros,&nbsp;Casey A. Thomas,&nbsp;Wei Sung Ng,&nbsp;George V. Franks","doi":"10.1016/j.apt.2025.105018","DOIUrl":"10.1016/j.apt.2025.105018","url":null,"abstract":"<div><div>Flocculation-flotation is an important process for the treatment and recovery of fine particles. This study investigates the influence of polymer molecular weight (MW) and shear environment on the aggregation behaviour of fine chalcopyrite particles treated with anionic polyacrylamides (APAM), under a typical range of flocculation-flotation conditions. High-resolution <em>in-situ</em> images were obtained to measure aggregate size using Image Derived Chord Length Distributions (ID-CLD). The relationship between polymer MW and shear-induced forces was analysed along with aggregate formation and breakage kinetics, breakage reversibility and aggregate regrowth. The results indicate that the aggregates typically reached maximum sizes about 1 min after polymer addition and break over time. Higher MW polymers produced larger aggregates that could better withstand breakage effects. Lower shear rates enhanced floc growth, whereas higher shear rates promoted comparatively hindered aggregate growth and increased particle breakage. The shear-induced breakage process was found to be mostly irreversible for the chalcopyrite particles, with minor aggregate regrowth following subsequent shear reduction. These findings provide key insights into the role of polymer characteristics and shear conditions in controlling the size and integrity of aggregates, which is essential for optimising aggregation performance in separation processes and industrial plants.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105018"},"PeriodicalIF":4.2,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723335","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":"Novel Zn/MoSe2 nanoflower with selenium vacancies for the effective charge separation, photo-electrochemical study and efficient visible-light degradation of Ciprofloxacin","authors":"Shubham Raj,&nbsp;Yashaswini Thakur,&nbsp;Puspendu Sardar,&nbsp;Amar Nath Samanta","doi":"10.1016/j.apt.2025.105020","DOIUrl":"10.1016/j.apt.2025.105020","url":null,"abstract":"<div><div>This research investigated the effectiveness of the novel selenium vacancy (2.5%, 5%, 7.5% &amp; 10%) within the nano-flower structure of Zn/MoSe₂, synthesized through the hydrothermal method, as a photocatalyst for degrading Ciprofloxacin (CIP) under visible light exposure. CIP has been broken down in an appropriate photocatalytic reactor, and the reaction rate constant has been assessed. After 45 min exposure, optimized selenium vacancy i.e., 5% Zn/MoSe₂ shows highest photocatalytic degradation of 98.68% in CIP based waste-water. The remarkable photocatalytic activity can be ascribed to the creation of a selenium vacancy that impedes the recombination of holes and electrons. The vacancies can be created with greater ease by using amalgamation of metals possessing distinct electronegativities. The optimised photocatalyst showing a very good stability which has been checked through recycle test and post-reaction characterisation. The study utilized RSM modeling, notably employing the Box-Behnken design, to ascertain the most favourable operational parameters for the visible-light degradation. The parameters encompass solution pH, catalyst dose, and initial CIP concentration. The 5% Zn/MoSe₂ demonstrated significant degradation efficiency, achieving degradation percentage of 90.76% in tap water and 86.15% in lake water. Superoxide radicals which are mainly responsible for degrading CIP have been tested using scavenging experiments, TMPD and EPR tests. Transition products were found using LC-MS, and their existence was then utilised to suggest a degradation pathway.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105020"},"PeriodicalIF":4.2,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723334","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":"Superquadric DEM study of the particle separation process in a multi-deck banana vibrating screen","authors":"Hemal Chowdhury,&nbsp;Zhouzun Xie,&nbsp;Yansong Shen","doi":"10.1016/j.apt.2025.105003","DOIUrl":"10.1016/j.apt.2025.105003","url":null,"abstract":"<div><div>Efficient separation of non-spherical particles is necessary for various chemical engineering processes, including screening in recycling industries. Discrete element method (DEM) has become a widely used tool for designing screening processes. This study uses a superquadric DEM model to design a 5-panel multi-deck banana screen for the separation of a specific particle mixture, with varying densities, sizes, and especially shapes, including rod-shaped, chip-shaped, and spherical. Then the effects of vibration conditions (frequency, amplitude, angle), design parameters (inclination angle, panel numbers), and feed particle numbers on the key parameters, including separation efficiency and particle penetration rates, are quantified. The simulation results indicate that under the investigated conditions, the highest separation efficiencies are found at 2 mm amplitude, 20 Hz frequency, and 45° vibration angle, yielding efficiencies of 90.8 % for rod-shaped particles, 71.0 % for chip-shaped particles, and 46.5 % for spherical residues. Higher frequencies generally improve rod-shaped and chip-shaped particles separation but lead to fluctuations for the spherical fines. Final particle penetration rates increase with frequency but decrease at higher amplitudes for low to moderate frequencies. This work may serve as a theoretical reference for separation process optimisation in similarly configured screening systems.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105003"},"PeriodicalIF":4.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713373","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":"Effect of impeller structure on the particle flow and adhesion behavior in a vertical intensive granulator","authors":"Zhijian Zuo ,&nbsp;Bingwen Feng ,&nbsp;Xingfu Lu ,&nbsp;Yuan Yang ,&nbsp;Shuguang Gong ,&nbsp;Jianping Zhang","doi":"10.1016/j.apt.2025.105017","DOIUrl":"10.1016/j.apt.2025.105017","url":null,"abstract":"<div><div>Performance optimization of a granulator is an important issue in many industrial applications dealing with granular matter. This work investigates how the particle flow and adhesion behavior in a vertical intensive granulator are affected by four structural parameters: blade type, impeller offset, blade number, and thread pitch. The DEM model was validated by comparing the impeller torque and adhesion behavior of particles. The particle velocity field, velocity fluctuation, coordinate number (CN), the relative standard deviation of contact number (RSDC) were used to quantify the particle dynamics and adhesion behavior. It was found that the particle velocity agitated by thread blade is lower than arc and straight blades; the particle velocity and velocity fluctuation increase with the decrease of impeller offset. Increasing the blade number and thread pitch leads to an increase in the particle velocity. Results obtained indicate that the thread blade with an impeller offset of 55 mm and a thread pitch of 80 mm has the best adhesion behavior, and the adhesion behavior decreases with the increase of blade number.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686965","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 characteristics of coal dust explosion in mine cartridge filter based on numerical simulation","authors":"Shihang Li ,&nbsp;Xiaodong She ,&nbsp;Shunyu Nan ,&nbsp;Hao Jin ,&nbsp;Fan Geng ,&nbsp;Jianxu Ding ,&nbsp;Bo Ren ,&nbsp;Gang Zhou ,&nbsp;Minghui Ouyang ,&nbsp;Yingchao Wei ,&nbsp;Shuda Hu","doi":"10.1016/j.apt.2025.105015","DOIUrl":"10.1016/j.apt.2025.105015","url":null,"abstract":"<div><div>In the underground coal mine tunneling faces, cartridge filters are often used for dust removal. However, during the operation of the cartridge filter, there is a potential hazard of dust explosions as the internal dust concentration reaches a certain level. Based on the CFD numerical simulation method, this research established a dust explosion model in a mine cartridge filter to analyze the features of internal dust explosions under operational conditions. The influence of initial transport velocity and dust concentration on the coal dust explosions was revealed. The numerical simulation demonstrates that an increase in the initial transport velocity enhances turbulence intensity, leading to elevated peak explosion pressure and peak of pressure rise rate inside the cartridge filter, thereby intensifying the level of dust explosions hazard. The peak explosion pressure is higher in the 0–1 m section of the pipeline, and the 0.5 m of the air inlet pipe demonstrates the most pronounced negative pressure effect. In the settling chamber, the speed at which the flame propagates initially increases as the propagation distance grows. However, it gradually slows down due to the accumulating pressure effect. The flame tends to propagate from the air inlet pipe, and the propagation speed increases as the flame travels further along the pipe. This research provides theoretical guidance for designing explosion-proof systems and venting mechanisms for cartridge filter interiors and pipes.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686964","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":"Fly Ash-MgO infused CaO-based sorbent for high-temperature CO2 capture under realistic carbonation and harsh calcination conditions","authors":"Shishir Tiwary,&nbsp;Soubhik Kumar Bhaumik","doi":"10.1016/j.apt.2025.105014","DOIUrl":"10.1016/j.apt.2025.105014","url":null,"abstract":"<div><div>Calcium Looping (CaL) technologies suffer from sintering-induced agglomeration, which reduces their performance under repeated carbonation and calcination cycles. The drawback has attracted extensive research towards modifying the sorbent by adding different inert materials through various synthesis techniques. Among various inert materials, fly ash (FA) emerges as a low-cost and abundantly available candidate containing refractory material that can resist sintering. The current work investigates the infusion of an optimized proportion of FA and MgO precursor (MgO_P) into a calcium-based organic precursor (CaAc) through the sol–gel combustion synthesis to enhance carbonation conversion (X_CBN) and stabilize cyclic performance. The study includes characterizing as-synthesized and spent sorbent while evaluating cyclic capture performance thermo-gravimetrically under realistic carbonation (CO₂ = 20v/v%, t_CBN = 20 mins, T_CBN = 650 °C) and harsh calcination (CO₂ = 80v/v%, t_CALC = 10 mins, T_CALC = 900 °C) conditions with shorter transition time. The sorbent performance was optimized based on the FA/inert ratio (FA_<em>y</em>) and CaAc/sorbent ratio (CaAc<em>_x_CaAc</em>). The result showed comparatively better performance of FA_<em>0.4</em> with deterioration of only 10.38 % over 5 cycles. Despite a lower X_CBN (55.77 %) of CaAc_<em>0.8</em> in the 1^st cycle compared to CaAc_<em>0.9</em> (79.74 %), the former exhibited more excellent cyclic stability, losing only 6.04 % in X_CBN after 5 cycles compared to the latter (38.75 %). Temperature sensitivity studies on CaAc_<em>0.8</em> established 650 °C as the most suitable carbonation temperature, incurring lower deterioration than 700 °C and 750 °C. Overall, CaAc_<em>0.8</em> (8 wt% FA, 12 wt% MgO_P) yielded the most stable cyclic performance (10 cycles) under realistic carbonation and harsh calcination conditions, proving its efficacy for CO₂ capture.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105014"},"PeriodicalIF":4.2,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686875","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":"Design of a wet iron ore feeder and analysis of cyclone global collection efficiency","authors":"Luana Boger Genaro ,&nbsp;Thiago C. Souza Pinto ,&nbsp;Alfredo M. Sarkis ,&nbsp;Thiago Faggion de Pádua ,&nbsp;José Teixeira Freire ,&nbsp;Rodrigo Béttega","doi":"10.1016/j.apt.2025.105009","DOIUrl":"10.1016/j.apt.2025.105009","url":null,"abstract":"<div><div>A rod-type solids feeder was developed for handling sticky solids such as wet iron ore. The physical properties of the ore were determined, including the loose and tapped bulk densities, as well as the Hausner ratio. Feeder development followed a prototyping methodology, with performance analyzed using a dry solids mass balance. The approach quantified the ore masses accumulated in different regions of the equipment: air duct, feeder compartments, cyclone walls, and underflow. The mass escaping in the overflow was estimated and the global solids collection efficiency was determined. The tests used ore with moisture levels of 0.02, 0.06, and 0.10 kg_water·kg_{wet solid}⁻¹, air temperatures of 80 and 90 °C, and air velocities from 10 to 30 m·s⁻¹. A minimum air velocity of 25 m·s⁻¹ prevented solids accumulation in the air duct, while adhesion to the cyclone wall was minimal (≤0.21 ± 0.06 %). The results demonstrated the effectiveness of the prototyping methodology, with determination of the real global collection efficiency of the cyclone highlighting the rod-type feeder as a promising solution for use with sticky solids.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105009"},"PeriodicalIF":4.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679244","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":"Evaluation of microwave absorption properties of CNT-containing alumina composites and its application as a heating medium for microwave-heated particle synthesis","authors":"Kaito Hirao ,&nbsp;Tomoomi Segawa ,&nbsp;Tomonori Fukasawa ,&nbsp;Toru Ishigami ,&nbsp;Fandi Angga Prasetya ,&nbsp;Katsunori Ishii ,&nbsp;Koichi Kawaguchi ,&nbsp;Hsiu-Po Kuo ,&nbsp;An-Ni Huang ,&nbsp;Kunihiro Fukui","doi":"10.1016/j.apt.2025.105008","DOIUrl":"10.1016/j.apt.2025.105008","url":null,"abstract":"<div><div>We investigated the dielectric and exothermic properties and thermal durability of carbon nanotube (CNT)-containing alumina composites. Experiments were conducted to synthesize nickel oxide (NiO) powder from aqueous Ni(NO₃)₂・6H₂O via microwave denitration in the presence of a heating jacket as a microwave susceptor. The heating jackets were fabricated using the CNT-containing alumina composites. As the CNT content in the composite increased, the apparent dielectric loss also increased, reaching a maximum value. Thereafter, the apparent dielectric loss decreased with increasing CNT content in the composite, indicating that the exothermic properties of the composites depend on the CNT content. The aerosol coating had a negligible effect on the dielectric and exothermic properties of the composites. However, composites with an aerosol coating demonstrated superior thermal durability. The heating jacket not containing CNT did not effectively serve as a susceptor. However, the heating jacket containing CNTs effectively served as a susceptor and facilitated the microwave denitration reaction to proceed, yielding crystalline NiO particles. The heating jacket enabled the temperature of aqueous Ni(NO₃) ₂・6H₂O in the flask to continue increasing up to 500 ℃ via heat conduction. In conclusion, CNT-containing alumina composites are potential materials for use as susceptors in hybrid heating.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 9","pages":"Article 105008"},"PeriodicalIF":4.2,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670511","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}