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Engineering heterogeneous Z-scheme photocatalysts Fe-BTC/CuInS2/BiVO4 integrated with carbon quantum dots to enhance the efficiency of Cr(VI) reduction and RR-195 degradation under visible light 与碳量子点集成的Fe-BTC/CuInS2/BiVO4工程非均相z型光催化剂在可见光下提高Cr(VI)还原和RR-195降解效率
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-06-04 DOI: 10.1016/j.apt.2025.104938
Nguyen Duc Hai , Pham Thi Mai Huong , Nguyen The Huu , Nguyen Xuan Huy , Vuong Thi Lan Anh , Hoa T. Vu , Huan V. Doan , Manh B. Nguyen
{"title":"Engineering heterogeneous Z-scheme photocatalysts Fe-BTC/CuInS2/BiVO4 integrated with carbon quantum dots to enhance the efficiency of Cr(VI) reduction and RR-195 degradation under visible light","authors":"Nguyen Duc Hai ,&nbsp;Pham Thi Mai Huong ,&nbsp;Nguyen The Huu ,&nbsp;Nguyen Xuan Huy ,&nbsp;Vuong Thi Lan Anh ,&nbsp;Hoa T. Vu ,&nbsp;Huan V. Doan ,&nbsp;Manh B. Nguyen","doi":"10.1016/j.apt.2025.104938","DOIUrl":"10.1016/j.apt.2025.104938","url":null,"abstract":"<div><div>In this study, Fe-BTC/CuInS<sub>2</sub>/BiVO<sub>4</sub> composites (with Fe-BTC content ranging from 10 to 30 wt%) were synthesized followed by the incorporation of carbon quantum dots (CQDs) to form FCB-CQD photocatalysts. The resulting materials exhibit several key advantages, including high surface area, large pore volume, small particle size, efficient visible light absorption, and improved charge transport properties. The integration of CQDs significantly enhanced charge separation and reduced electron–hole recombination. A Z-scheme charge transfer mechanism was proposed and validated, enabling the FCB-CQD photocatalysts to achieve highly efficient photocatalytic reduction of Cr(VI) to Cr(III) and degradation of Reactive Red 195 (RR-195) under visible light. The 20%FCB-CQD sample achieved removal efficiencies exceeding 98 % for both pollutants. Key operational parameters, such as catalyst dosage, pollutant concentration, pH, reactive species involvement, and photocatalyst stability, were systematically investigated. Electrochemical and optical characterizations were used to construct the band structure and elucidate the electron transfer pathway. Scavenger experiments confirmed the dominant active species involved in each process, providing insight into the underlying photocatalytic mechanisms. These findings demonstrate the promising potential of FCB-CQD as an efficient and reusable photocatalyst for environmental remediation applications.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 8","pages":"Article 104938"},"PeriodicalIF":4.2,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212555","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}
引用次数: 0
Effect of local erosion on flow pattern and particle self-rotation in a cyclone separator 局部侵蚀对旋风分离器内流型和颗粒自旋的影响
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-05-31 DOI: 10.1016/j.apt.2025.104949
Jianbo Zhao , Xiuxun Hao , Xiaohan Guo , Fei Gao , Junling Fan , Pan Zhang , Guanghui Chen
{"title":"Effect of local erosion on flow pattern and particle self-rotation in a cyclone separator","authors":"Jianbo Zhao ,&nbsp;Xiuxun Hao ,&nbsp;Xiaohan Guo ,&nbsp;Fei Gao ,&nbsp;Junling Fan ,&nbsp;Pan Zhang ,&nbsp;Guanghui Chen","doi":"10.1016/j.apt.2025.104949","DOIUrl":"10.1016/j.apt.2025.104949","url":null,"abstract":"<div><div>Erosion is an inevitable problem of cyclone separator, and serious erosion will greatly affect the movement of the particles. To improve the understanding of the particle self-rotation in cyclone separator, in this research, we explored the influence of local wall erosion on local vortices and particle self-rotation in cyclone separators, leveraging coupled CFD and DEM simulations. The numerical results show that as erosion thickness grows in the cylinder, particle self-rotation decreases. Particles are prone to aggregation within the cone, which significantly affects their self-rotation speed. When the erosion thickness is only 2 mm or 5 mm, the slight deformation of the wall surface helps break up particle agglomeration, thereby increasing the particle self-rotation speed. However, when the erosion thickness reaches 10 mm or 15 mm, severe wear and deformation create deeper grooves, which promote particle aggregation (the particle self-rotation speed decreases by 7.2 % and 19.9 % respectively, compared to the cyclone separator without wear). Meanwhile, the larger erosion thickness spawns local vortices that alter particle motion trajectory and make them more likely to be captured by internal quasi-forced vortex.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104949"},"PeriodicalIF":4.2,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185152","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}
引用次数: 0
An effective strategy for synthesizing spinel NixMn1-xFe2O4 by oxidation roasting technology: Synergetic reaction and phase evolution behavior 氧化焙烧技术合成尖晶石NixMn1-xFe2O4的有效策略:协同反应和相演化行为
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-05-30 DOI: 10.1016/j.apt.2025.104951
Jiaqi Wen , Chenghong Liu , Lihua Gao , Zhijun He
{"title":"An effective strategy for synthesizing spinel NixMn1-xFe2O4 by oxidation roasting technology: Synergetic reaction and phase evolution behavior","authors":"Jiaqi Wen ,&nbsp;Chenghong Liu ,&nbsp;Lihua Gao ,&nbsp;Zhijun He","doi":"10.1016/j.apt.2025.104951","DOIUrl":"10.1016/j.apt.2025.104951","url":null,"abstract":"<div><div>An oxidation roasting technology has been reported as an effective technology for successfully synthesizing nickel manganese ferrite Ni<sub>x</sub>Mn<sub>1-x</sub>Fe<sub>2</sub>O<sub>4</sub> (0 &lt; x &lt; 1) with a spinel crystal structure. The experimental results demonstrated the successful synthesis of nickel manganese ferrite Ni<sub>0.5</sub>Mn<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> samples with relatively high purities at an oxidation roasting temperature of 1200 °C for 2 h with a Ni:Mn:Fe molar ratio of 1:1:4. The synthesized samples exhibited a magnetization saturation (Ms) value of 53.71 emu/g, a coercivity (Hc) value of 34.88 Oe, and a remanent magnetization (Mr) of 3.64 emu/g. Additionally, these samples had a total pore volume of 0.071 cm<sup>3</sup>/g, a Specific Surface Area (SSA) of 24.13 cm<sup>2</sup>/g, and an Average Particle Size (APS) of 12.32 nm. It was concluded that the synthesis route of Ni<sub>x</sub>Mn<sub>1-x</sub>Fe<sub>2</sub>O<sub>4</sub> could be theoretically summarized into two routes. One route involves the simultaneous substitution of divalent iron (Fe<sup>2+</sup>) and trivalent iron (Fe<sup>3+</sup>) in the spinel structure of (Fe)[Fe]<sub>2</sub>O<sub>4</sub> by divalent manganese ions (Mn<sup>2+</sup>) and trivalent nickel ions (Ni<sup>3+</sup>), resulting in the formation of (Mn)<sub>x</sub>(Fe)<sub>1-x</sub>[Ni]<sub>y</sub>[Fe]<sub>2-y</sub>O<sub>4</sub> with a spinel crystal structure. In this structure, the Ni<sup>3+</sup> ions preferentially occupy the octahedral sites, whereas the Mn<sup>2+</sup> ions predominantly reside in the tetrahedral sites of the nickel manganese ferrites (Mn)<sub>x</sub>(Fe)<sub>1-x</sub>[Ni]<sub>y</sub>[Fe]<sub>2-y</sub>O<sub>4</sub>. Furthermore, the mixed spinel crystal structure of (Ni)<sub>y</sub>(Fe)<sub>1-y</sub>[Mn]<sub>x</sub>[Fe]<sub>2-x</sub>O<sub>4</sub> could be transformed into nickel manganese ferrite (Mn)<sub>x</sub>(Fe)<sub>1-x</sub>[Ni]<sub>y</sub>[Fe]<sub>2-y</sub>O<sub>4</sub> under the influence of a higher oxidization roasting temperature. Nickel manganese ferrite Ni<sub>x</sub>Mn<sub>1-x</sub>Fe<sub>2</sub>O<sub>4</sub> (0 &lt; x &lt; 1) with normal and inverse spinel structures inevitably coexists and co-transformed in the synthesis process of Ni<sub>x</sub>Mn<sub>1-x</sub>Fe<sub>2</sub>O<sub>4</sub> by oxidation roasting technology.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104951"},"PeriodicalIF":4.2,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178589","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}
引用次数: 0
Effect of liquid nitrogen cold soaking on the pore structure and fractal characteristics during in situ leaching of sandstone uranium ores 液氮冷浸对砂岩铀矿石原位浸出孔隙结构及分形特征的影响
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-05-29 DOI: 10.1016/j.apt.2025.104943
Leiming Wang , Liang Cheng , Shenghua Yin , Wei Chen , Shuo Li , Chao Zhang , Senmiao Xue , Jian Yang , Yun Zhou , Jinglin Xu , Lujing Zheng , Cunbao Li , Yafei Hu
{"title":"Effect of liquid nitrogen cold soaking on the pore structure and fractal characteristics during in situ leaching of sandstone uranium ores","authors":"Leiming Wang ,&nbsp;Liang Cheng ,&nbsp;Shenghua Yin ,&nbsp;Wei Chen ,&nbsp;Shuo Li ,&nbsp;Chao Zhang ,&nbsp;Senmiao Xue ,&nbsp;Jian Yang ,&nbsp;Yun Zhou ,&nbsp;Jinglin Xu ,&nbsp;Lujing Zheng ,&nbsp;Cunbao Li ,&nbsp;Yafei Hu","doi":"10.1016/j.apt.2025.104943","DOIUrl":"10.1016/j.apt.2025.104943","url":null,"abstract":"<div><div>In this study, a green and efficient liquid nitrogen fracturing method was explored. Sandstone uranium ore was first treated with liquid nitrogen cold soaking, followed by an analysis of the evolution of its pore and fracture structure using Low temperature nitrogen adsorption(LTNA), Nuclear magnetic resonance (NMR), and Scanning electron microscopy (SEM). The fractal characteristics of the pore structure and its evolution mechanism were also examined.The results show that gas adsorption in the ore increased with longer cold soaking times and more cycles.The highest nitrogen adsorption capacity was observed at a soaking time of 180 min, reaching 15.8556 cm<sup>3</sup>/g. Additionally, after 15 freezing cycles, the nitrogen adsorption capacity reached 14.8818 cm<sup>3</sup>/g. The proportion of micropores decreased, while mesopores and macropores increased. Specifically, after 180 min of liquid nitrogen soaking, micropores decreased by 9.59 %, mesopores increased by 7.79 %, and macropores increased by 1.8 %. After 15 cycles, micropores decreased by 10.55 %, mesopores increased by 6.38 %, and macropores increased by 4.17 %. SEM observations confirmed that the liquid nitrogen treatment expanded existing pores and cracks, and generated new fractures.Fractal dimension analysis revealed that liquid nitrogen treatment reduced the fractal dimension of the ore.This study effectively improves permeability and promotes uranium leaching in sandstone ores.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104943"},"PeriodicalIF":4.2,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170409","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}
引用次数: 0
Alkaline-earth metal-doped In2O3 microtubes: a simple and efficient approach for detection of ppb-level formaldehyde gas 碱土金属掺杂In2O3微管:一种检测ppb级甲醛气体的简单高效方法
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-05-28 DOI: 10.1016/j.apt.2025.104948
Wenjing Wu , Jing Li , Bo Hong , Jingcai Xu , Xiaoling Peng , Hongwei Chen , Shi Qiu , Nan Zhang , Xinqing Wang
{"title":"Alkaline-earth metal-doped In2O3 microtubes: a simple and efficient approach for detection of ppb-level formaldehyde gas","authors":"Wenjing Wu ,&nbsp;Jing Li ,&nbsp;Bo Hong ,&nbsp;Jingcai Xu ,&nbsp;Xiaoling Peng ,&nbsp;Hongwei Chen ,&nbsp;Shi Qiu ,&nbsp;Nan Zhang ,&nbsp;Xinqing Wang","doi":"10.1016/j.apt.2025.104948","DOIUrl":"10.1016/j.apt.2025.104948","url":null,"abstract":"<div><div>Metal doping has been widely acknowledged as a<!--> <!-->facile yet impactful approach to optimize the gas-sensing performance of metal oxide semiconductors. In this study, stable-valence alkaline-earth metals <strong>(</strong>Ca, Sr, and Ba) are incorporated into In<sub>2</sub>O<sub>3</sub> microtubes to investigate the influence of ionic radius on formaldehyde gas-sensing performance. The results indicate that heterogeneous doping leads to a reduction in average grain size and bandgap, while concurrently increasing the specific surface area and the concentration of oxygen vacancies. The formaldehyde response values increase from 36.18 for In<sub>2</sub>O<sub>3</sub> sensor, to 95.66 for In<sub>2</sub>O<sub>3</sub>-Ca sensor, to 107.93 for In<sub>2</sub>O<sub>3</sub>-Sr sensor, and up to 154.32 for In<sub>2</sub>O<sub>3</sub>-Ba sensor, correlating with the ionic radius of the doped-metals. The In<sub>2</sub>O<sub>3</sub>-Ba sensor notably demonstrates excellent selectivity toward formaldehyde, long-term stability, and a reduced operating temperature of 190 °C. The increase in ionic radius is associated with greater lattice distortion in the In<sub>2</sub>O<sub>3</sub>-Ba microtubes, a reduction in average grain size, and an elevated concentration of oxygen vacancies. Larger radius metal-doping significantly elevates oxygen vacancy density and chemisorbed oxygen content. Density functional theory calculations reveal that the adsorption energy for formaldehyde molecules on the In<sub>2</sub>O<sub>3</sub>-Ba sensor is the lowest at −1.75 eV. The enhanced vacancy and chemisorbed oxygen from acceptor Ba<sup>3+</sup>-doping into the n-type In<sub>2</sub>O<sub>3</sub>-Ba sensor facilitate the excellent gas-sensing performance, highlighting the contribution of the large-radius acceptor-doping to the high-performance In<sub>2</sub>O<sub>3</sub> gas sensor.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104948"},"PeriodicalIF":4.2,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170492","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}
引用次数: 0
Comparative CFD study on regional drug deposition of Breezhaler® and Handihaler® in the human respiratory tract Breezhaler®和Handihaler®在人呼吸道区域药物沉积的比较CFD研究
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-05-28 DOI: 10.1016/j.apt.2025.104935
Lixing Zhang , Gang Guo , Zhenbo Tong , Ya Zhang , Aibing Yu , Changhui Li
{"title":"Comparative CFD study on regional drug deposition of Breezhaler® and Handihaler® in the human respiratory tract","authors":"Lixing Zhang ,&nbsp;Gang Guo ,&nbsp;Zhenbo Tong ,&nbsp;Ya Zhang ,&nbsp;Aibing Yu ,&nbsp;Changhui Li","doi":"10.1016/j.apt.2025.104935","DOIUrl":"10.1016/j.apt.2025.104935","url":null,"abstract":"<div><div>Inhalation therapy has become a cornerstone in the management of chronic respiratory diseases such as chronic obstructive pulmonary disease (COPD) and asthma. Among various devices, Breezhaler® and Handihaler® are two widely used dry powder inhalers (DPIs) in clinical practice. However, due to differences in structural design and aerodynamic characteristics, these devices exhibit markedly different drug deposition patterns within the respiratory tract. Currently, there is a lack of comprehensive comparative studies investigating their deposition efficiency and underlying mechanisms across distinct regions of the airway. To address this gap, the present study employs CFD-DPM approach to evaluate and compare the deposition and distribution behavior of Breezhaler® and Handihaler® in the MT, TB, and deep lung regions under five pressure drop levels and four particle size conditions. The results indicate that Breezhaler® features a more streamlined internal structure, allowing the airflow to maintain higher and more uniform velocities. In contrast, Handihaler® generates lower overall airflow speeds and exhibits greater velocity gradients and localized turbulence within the oral cavity. For both devices, oral deposition rates increase with rising pressure drops and particle sizes, with Handihaler® consistently showing higher oral deposition, particularly under elevated flow and particle size conditions. In the TB region, Breezhaler® demonstrates superior deposition efficiency compared to Handihaler®. Enhancing TB deposition with Breezhaler® can be achieved by utilizing smaller particle sizes, while Handihaler® can improve TB deposition efficiency even with larger particles by operating under lower pressure drops. Furthermore, Handihaler® shows better performance in drug delivery to the deep lung region.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104935"},"PeriodicalIF":4.2,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154507","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}
引用次数: 0
Mechanism of a new combined collector for efficient flotation separation of cassiterite and calcite 新型组合捕收剂对锡石与方解石浮选分离的机理研究
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-05-28 DOI: 10.1016/j.apt.2025.104942
Yonghong Xu , Lingyun Huang , Mei Zhang , Jianhan Zhou , Bo Hu , Louyan Shen , Jian Liu , Dandan Wu , Siyuan Yang
{"title":"Mechanism of a new combined collector for efficient flotation separation of cassiterite and calcite","authors":"Yonghong Xu ,&nbsp;Lingyun Huang ,&nbsp;Mei Zhang ,&nbsp;Jianhan Zhou ,&nbsp;Bo Hu ,&nbsp;Louyan Shen ,&nbsp;Jian Liu ,&nbsp;Dandan Wu ,&nbsp;Siyuan Yang","doi":"10.1016/j.apt.2025.104942","DOIUrl":"10.1016/j.apt.2025.104942","url":null,"abstract":"<div><div>The challenging separation of cassiterite from calcite by flotation stems from their similar floatability, requiring innovative combined collectors to improve process efficiency and selectivity. Here, a novel PTPA/FeCl<sub>3</sub> collector was developed by synthesizing p-<em>tert</em>-butylphenylhydroxamic acid (PTPA) with FeCl<sub>3</sub>. Microflotation tests showed that using PTPA alone yielded 81.80% SnO<sub>2</sub> and 45.87% CaO recoveries, whereas PTPA/FeCl<sub>3</sub> increased SnO<sub>2</sub> recovery to 89.51% while reducing CaO to 27.02%, demonstrating superior separation efficiency. Contact angle measurements confirmed enhanced cassiterite hydrophobicity from the mixed collector. SEM-EDS and XPS analyses revealed effective chemisorption of PTPA/FeCl<sub>3</sub> on cassiterite, where PTPA and FeCl<sub>3</sub> formed a stably adsorbed chelate complex. In contrast, calcite exhibited weak and unstable adsorption. The mixed collector thus combines strong collecting capability with high selectivity for cassiterite over calcite.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104942"},"PeriodicalIF":4.2,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154506","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}
引用次数: 0
Effects of curing temperatures and waste marble aggregates on the properties of geopolymer mortars produced with industrial by-products and waste baked clay powders 养护温度和废大理石骨料对用工业副产物和废焙烧粘土粉制备地聚合物砂浆性能的影响
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-05-27 DOI: 10.1016/j.apt.2025.104946
Cenk Karakurt, Ahmet Ferdi Şenol, Nazım Çağatay Demiral
{"title":"Effects of curing temperatures and waste marble aggregates on the properties of geopolymer mortars produced with industrial by-products and waste baked clay powders","authors":"Cenk Karakurt,&nbsp;Ahmet Ferdi Şenol,&nbsp;Nazım Çağatay Demiral","doi":"10.1016/j.apt.2025.104946","DOIUrl":"10.1016/j.apt.2025.104946","url":null,"abstract":"<div><div>This study explores the physical, mechanical, and microstructural properties of geopolymer mortars produced from various waste materials, including fly ash (F), blast furnace slag (S), waste baked clay (WBC), and waste marble. A two-phase process was employed to develop mortars meeting specific performance targets. In the first phase, geopolymer mixes were prepared using powdered precursors derived from industrial by-products and WBC. In the second phase, the effect of replacing river sand with waste marble aggregate at varying levels (25 %, 50 %, and 75 % by weight) was investigated, focusing on mixtures demonstrating superior mechanical strength. Results showed that F-based mortars achieved a maximum compressive strength of 38.2 MPa when cured at 80 °C, while S-based mortars reached 48.5 MPa at 60 °C. The mechanical performance of WBC-based mortars improved with 50 % substitution of F or S. Additionally, incorporating up to 25 % waste marble aggregate in F- or S-based mortars enhanced their strength. This research supports the development of sustainable construction materials by promoting the reuse of WBC, industrial by-products, and waste marble. The proposed method presents a feasible pathway to reduce natural resource consumption and carbon emissions associated with conventional mortar production.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104946"},"PeriodicalIF":4.2,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154508","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}
引用次数: 0
Design and numerical simulation of a novel vortex structure for copper slag melting reduction process 新型铜渣熔炼还原涡结构的设计与数值模拟
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-05-27 DOI: 10.1016/j.apt.2025.104944
Xiang Li, Yan Liu, Tingan Zhang, Yadong Xiao, Kun Wang
{"title":"Design and numerical simulation of a novel vortex structure for copper slag melting reduction process","authors":"Xiang Li,&nbsp;Yan Liu,&nbsp;Tingan Zhang,&nbsp;Yadong Xiao,&nbsp;Kun Wang","doi":"10.1016/j.apt.2025.104944","DOIUrl":"10.1016/j.apt.2025.104944","url":null,"abstract":"<div><div>A new type of vortex entrainment feeder structure has been established to address the problem of powder suspension and the inability to be quickly sucked up by the melt pool in the current mechanical stirring melting reduction tank. Numerical simulations of the particle motion behaviour and fluid flow characteristics of the four feeders have been carried out to determine the justification of the structural design. An experimentally verified numerical approach was established using the Eulerian model coupled with the Dense Discrete Phase Model (DDPM). The results show that the Type-4 (Double-flow channel) creates vortexes with significant effect, the shape of the entrainment vortex is uniform, and the velocity is high, the radial and axial particle concentration is 1.75 times and 1.44 times higher than that of the Type-1 (No-flow channel), and the particles are dispersed optimally, with a more extended residence mixing time. The mass flow variance of the particles was reduced by 55 % compared to the Type-1, the number of high-velocity particles was &gt; 92 %, and the eccentricity distance of the positional distribution was shortened. The main driving forces for radial and axial particle dispersion are negative pressure entrainment of the gas phase and axial velocity difference. The variance values of the swirling number in the cylinder/cone zone were reduced by 91.3 % and 38.5 %, respectively, and the stability of the swirl flow field was improved.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 7","pages":"Article 104944"},"PeriodicalIF":4.2,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154509","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}
引用次数: 0
Modulation of demagnetization field and DC bias performance of carbonyl iron molded inductors by mixing submicron FeSi particles 混合亚微米FeSi粒子调制羰基铁模制电感器的退磁场和直流偏置性能
IF 4.2 2区 工程技术
Advanced Powder Technology Pub Date : 2025-05-23 DOI: 10.1016/j.apt.2025.104939
Yong Zhang , Junzhou Wang , Xinyan Huang , Sizhe He , Panjie Shao , Aimin Wu , Xuefeng Zhang , Zhaohui Yang , Zhongli Jiang , Dongmei Feng , Hao Huang
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