Particuology最新文献

Effects of different grinding media on the interfacial properties and flotation mechanism of lepidolite grinding products 不同磨矿介质对锂云石磨矿产品界面特性及浮选机理的影响

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-04-01 Epub Date: 2026-02-04 DOI: 10.1016/j.partic.2026.01.029

Yuqing Li , Ningning Liao , Caibin Wu , Riqian Liu , Ji Wu , Zepeng Lin , Haowen Wu

Grinding plays a fundamental role in determining flotation efficiency, as the morphology of grinding media directly influences mineral particle morphology and surface properties. This research systematically examines the impact of mill barrel materials and grinding media types on the flotation performance of lepidolite through comprehensive multi-scale characterization. Analytical results demonstrate that compared to conventional steel ball milling, ceramic ball milling generates products with coarser particle size distribution and substantially reduces the content of fine particles below 23 μm. Particularly noteworthy is the configuration combining ceramic mill barrel with ceramic balls (C + C), which effectively promotes the exposure of {001} cleavage planes, thereby significantly enhancing collector adsorption on mineral surfaces. SEM-EDS characterization identified substantial iron-rich flocculent coatings on particle surfaces processed in steel mill environments, whether using ceramic balls (S + C) or steel balls (S + S), which considerably hindered effective reagent adsorption. The C + C ground products exhibited the most pronounced positive potential shift upon collector addition, coupled with the lowest surface oxidation degree and minimal FeOOH formation. Comparative flotation tests ultimately verified that the C + C grinding approach enhanced lepidolite recovery by 10-20 % points. This work elucidates the interfacial mechanism through which media materials regulate cleavage plane exposure and iron contamination, providing a novel theoretical framework for media selection in silicate mineral processing. The findings offer crucial theoretical and practical guidance for optimizing grinding operations to improve lithium resource efficiency.

磨矿是决定浮选效率的基础，磨矿介质的形态直接影响矿物颗粒的形态和表面性质。本研究通过综合多尺度表征，系统考察了磨筒物料和磨矿介质类型对锂云石浮选性能的影响。分析结果表明，与常规钢球磨相比，陶瓷球磨的产物粒度分布更粗，23 μm以下的细颗粒含量大幅降低。特别值得注意的是陶瓷磨筒与陶瓷球（C + C）相结合的配置，有效地促进了{001}解理面的暴露，从而显著增强了捕收剂在矿物表面的吸附。SEM-EDS表征发现，无论是陶瓷球（S + C）还是钢球（S + S），在钢铁厂环境中处理的颗粒表面都有大量富铁絮凝膜，这极大地阻碍了有效的试剂吸附。添加捕收剂后，C + C接地产物表现出最明显的正电位偏移，同时表面氧化程度最低，FeOOH生成最少。对比浮选试验最终证实，采用C + C磨矿方法可使锂云母回收率提高10 ~ 20%。本研究阐明了介质材料调控解理面暴露和铁污染的界面机制，为硅酸盐矿物加工中介质选择提供了新的理论框架。研究结果为优化磨矿工艺、提高锂资源效率提供了重要的理论和实践指导。

{"title":"Effects of different grinding media on the interfacial properties and flotation mechanism of lepidolite grinding products","authors":"Yuqing Li , Ningning Liao , Caibin Wu , Riqian Liu , Ji Wu , Zepeng Lin , Haowen Wu","doi":"10.1016/j.partic.2026.01.029","DOIUrl":"10.1016/j.partic.2026.01.029","url":null,"abstract":"<div><div>Grinding plays a fundamental role in determining flotation efficiency, as the morphology of grinding media directly influences mineral particle morphology and surface properties. This research systematically examines the impact of mill barrel materials and grinding media types on the flotation performance of lepidolite through comprehensive multi-scale characterization. Analytical results demonstrate that compared to conventional steel ball milling, ceramic ball milling generates products with coarser particle size distribution and substantially reduces the content of fine particles below 23 μm. Particularly noteworthy is the configuration combining ceramic mill barrel with ceramic balls (C + C), which effectively promotes the exposure of {001} cleavage planes, thereby significantly enhancing collector adsorption on mineral surfaces. SEM-EDS characterization identified substantial iron-rich flocculent coatings on particle surfaces processed in steel mill environments, whether using ceramic balls (S + C) or steel balls (S + S), which considerably hindered effective reagent adsorption. The C + C ground products exhibited the most pronounced positive potential shift upon collector addition, coupled with the lowest surface oxidation degree and minimal FeOOH formation. Comparative flotation tests ultimately verified that the C + C grinding approach enhanced lepidolite recovery by 10-20 % points. This work elucidates the interfacial mechanism through which media materials regulate cleavage plane exposure and iron contamination, providing a novel theoretical framework for media selection in silicate mineral processing. The findings offer crucial theoretical and practical guidance for optimizing grinding operations to improve lithium resource efficiency.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"111 ","pages":"Pages 27-37"},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Remediation of oxytetracycline-contaminated aqueous solution utilizing functionalized coffee ground waste-derived activated carbon 利用功能化咖啡渣衍生活性炭修复土霉素污染的水溶液

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-04-01 Epub Date: 2026-02-03 DOI: 10.1016/j.partic.2026.01.027

Afiqah Tasneem Abd Khalil, Mohamad Firdaus Mohamad Yusop, Mohd Azmier Ahmad

The removal of trace concentrations of oxytetracycline (OTC), a stable antibiotic prevalent in aquatic environments represents a significant environmental challenge. This study effectively removed it by utilizing a cost-effective copper-modified coffee ground waste activated carbon (Cu²⁺-CGWAC), designed specifically for an enhanced adsorption of dilute pharmaceutical pollutants. The modified adsorbent was synthesized via a simplified method involving microwave-assisted activation with CO₂ gasification. Optimization via response surface methodology (RSM) has identified 616 W radiation power, 4 min radiation time and 1.00 g/g modification impregnation ratio (IR) as optimal conditions. The resulting adsorbent yielded 23.04 mg/g OTC uptake (actual: 24.88 mg/g; error: 7.40 %) and 75.86 % yield (actual: 80.52 %; error: 5.79 %). Cu²⁺-CGWAC adsorbent exhibited a high surface area (904.56 m²/g by BET analysis) and pore volume (0.3711 cm³/g), with carboxyl group functionalization. Subsequently, batch adsorption analysis was conducted to study the effect of adsorbent dosage, contact time, OTC initial concentration, OTC solution temperature and pH on the OTC removal, achieving a complete removal (100%) with maximum adsorption uptake of 30 mg/g for low concentration OTC solutions. Adsorption followed pseudo-second order (PSO) kinetics model and Freundlich isotherm, indicating heterogeneous multilayer adsorption behaviour with RMSE of 0.80 and minimal error of 7.51 %. Thermodynamic analysis suggested a spontaneous and endothermic process, with positive values of entropy change (0.37 kJ/mol K), enthalpy change (81.17 kJ/mol) and Arrhenius activation energy value (8.76 kJ/mol). The tailored Cu²⁺-CGWAC demonstrates advancement in a simplified adsorbent design, outlining a cost-effective, robust and high-performance potential for dilute pharmaceutical wastewater treatment.

土霉素（OTC）是水生环境中普遍存在的一种稳定的抗生素，其微量浓度的去除是一项重大的环境挑战。本研究通过使用具有成本效益的铜改性咖啡渣活性炭（Cu2+-CGWAC）有效地去除了它，该活性炭专门用于增强对稀释药物污染物的吸附。采用微波辅助活化CO2气化的简化方法合成了改性吸附剂。通过响应面法（RSM）优化确定了616 W辐射功率、4 min辐射时间和1.00 g/g改性浸渍比（IR）为最佳条件。所得吸附剂的OTC吸收率为23.04 mg/g（实际为24.88 mg/g，误差为7.40%），收率为75.86%（实际为80.52%，误差为5.79%）。Cu2+-CGWAC吸附剂具有较高的比表面积（BET分析为904.56 m2/g）和孔体积（0.3711 cm3/g），具有羧基功能化。随后，进行间歇吸附分析，研究吸附剂用量、接触时间、OTC初始浓度、OTC溶液温度和pH对OTC去除的影响，对低浓度OTC溶液达到100%的完全去除，最大吸附吸收率为30 mg/g。吸附过程符合拟二级动力学模型和Freundlich等温线，均相多层吸附，RMSE为0.80，最小误差为7.51%。热力学分析表明这是一个自发的吸热过程，熵变为正值（0.37 kJ/mol K），焓变为正值（81.17 kJ/mol）， Arrhenius活化能为正值（8.76 kJ/mol）。量身定制的Cu2+-CGWAC展示了简化吸附剂设计的进步，概述了低成本，稳健和高性能的稀释制药废水处理潜力。

{"title":"Remediation of oxytetracycline-contaminated aqueous solution utilizing functionalized coffee ground waste-derived activated carbon","authors":"Afiqah Tasneem Abd Khalil, Mohamad Firdaus Mohamad Yusop, Mohd Azmier Ahmad","doi":"10.1016/j.partic.2026.01.027","DOIUrl":"10.1016/j.partic.2026.01.027","url":null,"abstract":"<div><div>The removal of trace concentrations of oxytetracycline (OTC), a stable antibiotic prevalent in aquatic environments represents a significant environmental challenge. This study effectively removed it by utilizing a cost-effective copper-modified coffee ground waste activated carbon (Cu<sup>2+</sup>-CGWAC), designed specifically for an enhanced adsorption of dilute pharmaceutical pollutants. The modified adsorbent was synthesized via a simplified method involving microwave-assisted activation with CO<sub>2</sub> gasification. Optimization via response surface methodology (RSM) has identified 616 W radiation power, 4 min radiation time and 1.00 g/g modification impregnation ratio (IR) as optimal conditions. The resulting adsorbent yielded 23.04 mg/g OTC uptake (actual: 24.88 mg/g; error: 7.40 %) and 75.86 % yield (actual: 80.52 %; error: 5.79 %). Cu<sup>2+</sup>-CGWAC adsorbent exhibited a high surface area (904.56 m<sup>2</sup>/g by BET analysis) and pore volume (0.3711 cm<sup>3</sup>/g), with carboxyl group functionalization. Subsequently, batch adsorption analysis was conducted to study the effect of adsorbent dosage, contact time, OTC initial concentration, OTC solution temperature and pH on the OTC removal, achieving a complete removal (100%) with maximum adsorption uptake of 30 mg/g for low concentration OTC solutions. Adsorption followed pseudo-second order (PSO) kinetics model and Freundlich isotherm, indicating heterogeneous multilayer adsorption behaviour with RMSE of 0.80 and minimal error of 7.51 %. Thermodynamic analysis suggested a spontaneous and endothermic process, with positive values of entropy change (0.37 kJ/mol K), enthalpy change (81.17 kJ/mol) and Arrhenius activation energy value (8.76 kJ/mol). The tailored Cu<sup>2+</sup>-CGWAC demonstrates advancement in a simplified adsorbent design, outlining a cost-effective, robust and high-performance potential for dilute pharmaceutical wastewater treatment.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"111 ","pages":"Pages 11-26"},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sonochemical modification of clinoptilolite zeolite with iron species: Application to the remediation of methylene blue under photo-Fenton conditions 铁类沸石声化学改性斜沸石：在光- fenton条件下修复亚甲基蓝中的应用

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-04-01 Epub Date: 2026-02-09 DOI: 10.1016/j.partic.2026.02.001

Natalia Sobuś , Magdalena Król , Koffi Simeon Kouadio , Jérémy Dhainaut

In this study, a catalyst based on natural zeolite clinoptilolite (CLI), with iron oxide as the active center, was prepared following a two-stage method using ammonium exchange and subsequent metal deposition under ultrasonic irradiation for 40 min at 60 °C. This sonochemical approach significantly shortens the zeolite modification time and increases the specific surface area of the material from 35.4 to 169.5 m²/g. The iron-supported CLI was used to remove methylene blue (MB) from aqueous solution. Simple adsorption removed about 40 % of the initial contaminant, while photo-Fenton conditions reached a removal efficiency of 90 % over 1 h. This result indicates that Fe²⁺/Fe³⁺ species near the outer surface of the material effectively activate H₂O₂ upon exposure to UV radiation.

本研究以天然沸石斜沸石（CLI）为原料，以氧化铁为活性中心，在60℃超声照射40 min的条件下，采用铵交换和金属沉积两阶段法制备了一种催化剂。这种声化学方法显著缩短了沸石改性时间，并将材料的比表面积从35.4 m2/g增加到169.5 m2/g。用铁负载的CLI去除水溶液中的亚甲基蓝（MB）。简单吸附去除约40%的初始污染物，而光- fenton条件下在1小时内的去除效率达到90%。这一结果表明，材料外表面附近的Fe2+/Fe3+物质在暴露于紫外线辐射时有效地激活H2O2。

引用次数: 0

Anion coordination strength mediated aluminum corrosion for high-voltage lithium-metal batteries 高压锂金属电池负离子配位强度对铝腐蚀的影响

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-04-01 Epub Date: 2026-01-27 DOI: 10.1016/j.partic.2026.01.019

Han Chen , Tong Wu , Jinhao Zhang , Xiaozhong Fan , Wenping Ju , Jinxiu Chen , Lin Zhu , Haoxiong Nan , Shujing Ni , Peng Li , Long Kong

While high-voltage lithium-metal batteries are severely hindered limitations of active materials and electrolytes, the corrosion of aluminum (Al) current collector attract mild attention. In this work, the Al corrosion behavior mediated by anion is probed from the electrolyte solvation chemistry. The strong coordination strength of difluoro (oxalato)borate (DFOB⁻) anion effectively binds with Al³⁺, forming the contact ion pairs and aggregates structures. Compare with solvent-separated ion pairs, these structures with Al³⁺ complex deposit more readily on Al surface, exhibiting excellent capability to inhibit Al corrosion. The performance of Li||NCM622 cells employing lithium salts that inhibit Al corrosion is improved. This result confirms the detrimental impact of Al corrosion on battery performance under high-voltage cell operation, contributing to a deeper understanding of that the strong coordination strength anion inhibits Al corrosion and provides valuable insights for designing electrolytes for high-voltage batteries.

虽然高压锂金属电池受到活性材料和电解质的限制，但铝（Al）集流器的腐蚀引起的关注较少。本文从电解质溶剂化化学的角度探讨阴离子介导铝的腐蚀行为。二氟（草酸）硼酸盐（DFOB−）阴离子具有很强的配位强度，能与Al3+有效结合，形成接触离子对和聚集结构。与溶剂分离离子对相比，这些具有Al3+络合物的结构更容易沉积在Al表面，表现出优异的抑制Al腐蚀的能力。采用抑制铝腐蚀的锂盐，提高了Li||NCM622电池的性能。这一结果证实了高压电池运行下铝腐蚀对电池性能的不利影响，有助于更深入地了解强配位强度阴离子抑制铝腐蚀的作用，并为高压电池电解质的设计提供有价值的见解。

{"title":"Anion coordination strength mediated aluminum corrosion for high-voltage lithium-metal batteries","authors":"Han Chen , Tong Wu , Jinhao Zhang , Xiaozhong Fan , Wenping Ju , Jinxiu Chen , Lin Zhu , Haoxiong Nan , Shujing Ni , Peng Li , Long Kong","doi":"10.1016/j.partic.2026.01.019","DOIUrl":"10.1016/j.partic.2026.01.019","url":null,"abstract":"<div><div>While high-voltage lithium-metal batteries are severely hindered limitations of active materials and electrolytes, the corrosion of aluminum (Al) current collector attract mild attention. In this work, the Al corrosion behavior mediated by anion is probed from the electrolyte solvation chemistry. The strong coordination strength of difluoro (oxalato)borate (DFOB<sup>−</sup>) anion effectively binds with Al<sup>3+</sup>, forming the contact ion pairs and aggregates structures. Compare with solvent-separated ion pairs, these structures with Al<sup>3+</sup> complex deposit more readily on Al surface, exhibiting excellent capability to inhibit Al corrosion. The performance of Li||NCM622 cells employing lithium salts that inhibit Al corrosion is improved. This result confirms the detrimental impact of Al corrosion on battery performance under high-voltage cell operation, contributing to a deeper understanding of that the strong coordination strength anion inhibits Al corrosion and provides valuable insights for designing electrolytes for high-voltage batteries.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"111 ","pages":"Pages 50-57"},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Uniform superparamagnetic Fe3O4 nanoparticles synthesized via a hybrid coprecipitation–solvothermal method 用共沉淀法-溶剂热法合成均匀超顺磁性Fe3O4纳米颗粒

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-04-01 Epub Date: 2026-01-30 DOI: 10.1016/j.partic.2026.01.026

Minh Phuc Tran, Nhat Quang-Khoi Le, Anh Thi Le, Minh Thang Bui, Nguyen Da Huyen Vo, Thi My Dung Dang

Controlling the size while maintaining its superparamagnetic behavior has been one of the key challenges in synthesizing magnetite (Fe₃O₄) nanostructures. This study presents a facile hybrid coprecipitation–solvothermal route to synthesize uniform magnetite nanoparticles. X-ray diffraction and Raman spectroscopy confirmed the formation of phase-pure magnetite with an inverse spinel structure. Fourier-transform infrared spectroscopy and thermogravimetric analysis verified the presence of a stable polyvinylpyrrolidone coating on the particle surface. Field-emission scanning electron microscopy revealed spherical, well-dispersed Fe₃O₄ NPs with a narrow size distribution centered at 22.92

\pm

3.16 nm. The NPs exhibited superior superparamagnetism at room temperature, characterized by a high saturation magnetization of 91.41 emu g⁻¹, alongside negligible coercivity and remanence. Furthermore, stability experiments involving exposure to Rhodamine B under both dark and UV-light conditions revealed that the nanoparticles fully retained their structural integrity, original morphology, and magnetic sensitivity. Based on these results, our hybrid approach is believed to be a promising methodology for developing stable, high-performance magnetic systems for targeted drug delivery and wastewater remediation.

控制尺寸的同时保持其超顺磁性是合成Fe3O4磁铁矿纳米结构的关键挑战之一。本研究提出了一种简便的共沉淀-溶剂热混合合成均匀磁性纳米颗粒的方法。x射线衍射和拉曼光谱证实形成了具有反尖晶石结构的相纯磁铁矿。傅里叶变换红外光谱和热重分析证实了在颗粒表面存在稳定的聚乙烯吡咯烷酮涂层。场发射扫描电镜显示Fe3O4纳米粒子呈球形，分散良好，粒径分布较窄，中心为22.92±3.16 nm。NPs在室温下表现出优异的超顺磁性，饱和磁化强度高达91.41 emu g−1，矫顽力和剩磁可以忽略不计。此外，在黑暗和紫外线条件下暴露于罗丹明B的稳定性实验表明，纳米颗粒完全保留了其结构完整性、原始形态和磁灵敏度。基于这些结果，我们的混合方法被认为是一种有前途的方法，用于开发稳定，高性能的靶向药物输送和废水修复的磁性系统。

{"title":"Uniform superparamagnetic Fe3O4 nanoparticles synthesized via a hybrid coprecipitation–solvothermal method","authors":"Minh Phuc Tran, Nhat Quang-Khoi Le, Anh Thi Le, Minh Thang Bui, Nguyen Da Huyen Vo, Thi My Dung Dang","doi":"10.1016/j.partic.2026.01.026","DOIUrl":"10.1016/j.partic.2026.01.026","url":null,"abstract":"<div><div>Controlling the size while maintaining its superparamagnetic behavior has been one of the key challenges in synthesizing magnetite (Fe<sub>3</sub>O<sub>4</sub>) nanostructures. This study presents a facile hybrid coprecipitation–solvothermal route to synthesize uniform magnetite nanoparticles. X-ray diffraction and Raman spectroscopy confirmed the formation of phase-pure magnetite with an inverse spinel structure. Fourier-transform infrared spectroscopy and thermogravimetric analysis verified the presence of a stable polyvinylpyrrolidone coating on the particle surface. Field-emission scanning electron microscopy revealed spherical, well-dispersed Fe<sub>3</sub>O<sub>4</sub> NPs with a narrow size distribution centered at 22.92 <span><math><mrow><mo>±</mo></mrow></math></span> 3.16 nm. The NPs exhibited superior superparamagnetism at room temperature, characterized by a high saturation magnetization of 91.41 emu g<sup>−1</sup>, alongside negligible coercivity and remanence. Furthermore, stability experiments involving exposure to Rhodamine B under both dark and UV-light conditions revealed that the nanoparticles fully retained their structural integrity, original morphology, and magnetic sensitivity. Based on these results, our hybrid approach is believed to be a promising methodology for developing stable, high-performance magnetic systems for targeted drug delivery and wastewater remediation.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"111 ","pages":"Pages 1-10"},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of micron-nano coal particles by wet grinding in methanol 甲醇湿磨法制备微米纳米级煤颗粒

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-04-01 Epub Date: 2026-02-03 DOI: 10.1016/j.partic.2026.01.028

Fenghao Jiang , Biao Hu , Xusheng Zhang , Yifan Zhang , Shunxuan Hu , Junguo Li , Changning Wu , Ke Liu

Limited by comminution limit, the top-down method is a time-consuming and high energy demands process to produce ultrafine and submicron coal. The feasibility of the wet grinding in methanol was probed, and the breakage mechanism was investigated from the macroscopic, microstructure, crystal, and molecular perspectives in this study. The results show that at 35 min grinding time, the coal’s d₅₀ size decreased from 23.20 to 1.60 μm. Therefore, wet grinding in methanol is an efficient method to produce ultrafine coal. Moreover, with the increase of grinding time, the BET specific surface area of the sample increase, indicating that the comminution limit is not reached. Moreover, the characteristic diffraction peak intensity of kaolinite, amorphous carbon, quartz, and calcite of the sample decrease until they completely disappear due to destroy the crystal structure by the unstable energy on the lattice surface. The aromatics rings are cleaved and rearranged to form aromatic rings with radicals in continuous high-energy stress. The methanol was grafted onto the aromatic rings with radicals. The methanol shell may be easily built on the outside of coal particles due to increasing these side chains with compatibility with methanol. The agglomeration of particles is hindered, and thus the ultrafine grinding is promoted.

受粉碎极限的限制，自上而下法生产超细、亚微米煤耗时长、能耗高。探讨了甲醇湿法粉碎的可行性，并从宏观、微观、晶体、分子等角度探讨了破碎机理。结果表明：在磨矿时间为35 min时，煤的d50粒度由23.20 μm降至1.60 μm；因此，甲醇湿磨是制备超细煤的一种有效方法。随着粉碎时间的延长，试样的BET比表面积增大，说明未达到粉碎极限。此外，样品的高岭石、无定形碳、石英和方解石的特征衍射峰强度降低，直至完全消失，这是由于晶格表面的不稳定能量破坏了晶体结构。在持续的高能应力作用下，芳烃环发生断裂和重排，形成带自由基的芳烃环。甲醇接枝到带有自由基的芳香环上。甲醇壳可以很容易地建立在煤颗粒的外部，因为增加了这些侧链与甲醇的相容性。阻碍了颗粒的团聚，从而促进了超细粉碎。

{"title":"Preparation of micron-nano coal particles by wet grinding in methanol","authors":"Fenghao Jiang , Biao Hu , Xusheng Zhang , Yifan Zhang , Shunxuan Hu , Junguo Li , Changning Wu , Ke Liu","doi":"10.1016/j.partic.2026.01.028","DOIUrl":"10.1016/j.partic.2026.01.028","url":null,"abstract":"<div><div>Limited by comminution limit, the top-down method is a time-consuming and high energy demands process to produce ultrafine and submicron coal. The feasibility of the wet grinding in methanol was probed, and the breakage mechanism was investigated from the macroscopic, microstructure, crystal, and molecular perspectives in this study. The results show that at 35 min grinding time, the coal’s <em>d</em><sub>50</sub> size decreased from 23.20 to 1.60 μm. Therefore, wet grinding in methanol is an efficient method to produce ultrafine coal. Moreover, with the increase of grinding time, the BET specific surface area of the sample increase, indicating that the comminution limit is not reached. Moreover, the characteristic diffraction peak intensity of kaolinite, amorphous carbon, quartz, and calcite of the sample decrease until they completely disappear due to destroy the crystal structure by the unstable energy on the lattice surface. The aromatics rings are cleaved and rearranged to form aromatic rings with radicals in continuous high-energy stress. The methanol was grafted onto the aromatic rings with radicals. The methanol shell may be easily built on the outside of coal particles due to increasing these side chains with compatibility with methanol. The agglomeration of particles is hindered, and thus the ultrafine grinding is promoted.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"111 ","pages":"Pages 38-49"},"PeriodicalIF":4.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation into nanoparticle fluidization characteristics with electrostatic force-modified population balance model 基于静电力修正种群平衡模型的纳米颗粒流化特性研究

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-03-01 Epub Date: 2026-01-10 DOI: 10.1016/j.partic.2026.01.003

Juhui Chen , Ke Chen , Dan Li , Zhirui Zhao , Michael Zhuravkov , Lapatsin Siarhei , Wenrui Jiang

Within the two-fluid model framework integrated with particle dynamics theory, this study explicitly incorporates interparticle electrostatic forces to derive formulas for aggregation and breakage kernels of nanoparticle aggregates. Accordingly, an electrostatic-force-modified Population Balance Model (PBM) is proposed to track and characterize nanoparticle aggregation and breakage processes. To quantify the evolution of aggregate volume fractions and diameters, the flow characteristics of SiO₂ nanoparticles in a microfluidized bed are numerically investigated. The results demonstrate that the modified PBM enhances the dispersion of aggregates and improves fluidization quality. The electrostatic force increases with growing aggregate diameter. When nanoparticles enter the fully fluidized stage, the synergistic interplay among electrostatic repulsion, Brownian diffusion, and turbulent forces collectively regulates aggregate formation and breakage. This leads to a more organized spatial distribution of aggregates and a gradual reduction in local pressure drop fluctuations over time. Furthermore, the bed pressure difference increases significantly under the combined influence of gas velocity and electrostatic forces.

在结合粒子动力学理论的双流体模型框架下，本研究明确地将粒子间静电力纳入其中，推导出纳米粒子聚集体聚集和破碎核的公式。为此，提出了一种静静电修正的种群平衡模型（PBM）来跟踪和表征纳米颗粒的聚集和破碎过程。为了量化聚合体体积分数和粒径的演变，对SiO2纳米颗粒在微流化床中的流动特性进行了数值研究。结果表明，改性PBM提高了团聚体的分散性，改善了流化质量。静电力随骨料直径的增大而增大。当纳米颗粒进入完全流化阶段时，静电斥力、布朗扩散和湍流力之间的协同相互作用共同调节聚集体的形成和破碎。这导致聚集体的空间分布更有组织，随着时间的推移，局部压降波动逐渐减少。此外，在气速和静电力的共同作用下，床层压差显著增大。

{"title":"Investigation into nanoparticle fluidization characteristics with electrostatic force-modified population balance model","authors":"Juhui Chen , Ke Chen , Dan Li , Zhirui Zhao , Michael Zhuravkov , Lapatsin Siarhei , Wenrui Jiang","doi":"10.1016/j.partic.2026.01.003","DOIUrl":"10.1016/j.partic.2026.01.003","url":null,"abstract":"<div><div>Within the two-fluid model framework integrated with particle dynamics theory, this study explicitly incorporates interparticle electrostatic forces to derive formulas for aggregation and breakage kernels of nanoparticle aggregates. Accordingly, an electrostatic-force-modified Population Balance Model (PBM) is proposed to track and characterize nanoparticle aggregation and breakage processes. To quantify the evolution of aggregate volume fractions and diameters, the flow characteristics of SiO<sub>2</sub> nanoparticles in a microfluidized bed are numerically investigated. The results demonstrate that the modified PBM enhances the dispersion of aggregates and improves fluidization quality. The electrostatic force increases with growing aggregate diameter. When nanoparticles enter the fully fluidized stage, the synergistic interplay among electrostatic repulsion, Brownian diffusion, and turbulent forces collectively regulates aggregate formation and breakage. This leads to a more organized spatial distribution of aggregates and a gradual reduction in local pressure drop fluctuations over time. Furthermore, the bed pressure difference increases significantly under the combined influence of gas velocity and electrostatic forces.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"110 ","pages":"Pages 14-27"},"PeriodicalIF":4.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-handed spring actuated powder sampler for additive manufacturing 用于增材制造的单手弹簧驱动粉末取样器

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-03-01 Epub Date: 2026-01-20 DOI: 10.1016/j.partic.2026.01.007

Dina W. Khattab, Owen L. Appel, Jeffrey P. Youngblood, Paul Mort, Michael S. Titus

Additive manufacturing (AM) is a rapidly expanding manufacturing technique due to its ability to produce complex-shaped parts on demand. Laser powder bed fusion (LPBF) is an additive manufacturing process that involves melting thin, ideally uniform, but not necessarily so, spread powder layers through selective laser or electron beam rastering. This process requires spreading high-quality powders, preferably those with a narrow size distribution and spherical morphology, to form a compact powder bed suitable for selective melting and the formation of high-density components. During the AM process, powder morphology and size may change due to agglomeration, partial sintering, spatter formation, and other defects; therefore, careful monitoring of these changes is essential to maintain suitable flowability and spreadability. Standard powder sampling devices, for example, as used in pharmaceutical and agricultural industries, are too large to extract AM samples without significant interlayer particle mixing. Therefore, a new compact, single-handedly actuated powder sampler was designed and fabricated for use within a selective laser melting printing chamber to sample AM powders at shallow depths. Samples can be analyzed for changes in size distribution, morphology, and composition (e.g., surface degradation) after each build.

增材制造（AM）是一种快速发展的制造技术，因为它能够按需生产复杂形状的零件。激光粉末床熔合（LPBF）是一种增材制造工艺，包括通过选择性激光或电子束光栅熔化薄而均匀的粉末层，但不一定如此。该工艺需要铺撒高质量的粉末，最好是那些具有窄尺寸分布和球形形貌的粉末，以形成致密的粉末床，适合于选择性熔化和形成高密度组件。在增材制造过程中，粉末形貌和尺寸可能会因团聚、部分烧结、飞溅形成等缺陷而改变；因此，仔细监测这些变化对于保持适当的流动性和可扩展性至关重要。例如，在制药和农业工业中使用的标准粉末取样装置太大，无法在没有显著层间颗粒混合的情况下提取AM样品。因此，设计和制造了一种新的紧凑的，单手驱动的粉末取样器，用于在选择性激光熔化印刷室中对浅深度的AM粉末进行取样。每次构建后，可以分析样品的尺寸分布、形态和组成（例如，表面降解）的变化。

{"title":"Single-handed spring actuated powder sampler for additive manufacturing","authors":"Dina W. Khattab, Owen L. Appel, Jeffrey P. Youngblood, Paul Mort, Michael S. Titus","doi":"10.1016/j.partic.2026.01.007","DOIUrl":"10.1016/j.partic.2026.01.007","url":null,"abstract":"<div><div>Additive manufacturing (AM) is a rapidly expanding manufacturing technique due to its ability to produce complex-shaped parts on demand. Laser powder bed fusion (LPBF) is an additive manufacturing process that involves melting thin, ideally uniform, but not necessarily so, spread powder layers through selective laser or electron beam rastering. This process requires spreading high-quality powders, preferably those with a narrow size distribution and spherical morphology, to form a compact powder bed suitable for selective melting and the formation of high-density components. During the AM process, powder morphology and size may change due to agglomeration, partial sintering, spatter formation, and other defects; therefore, careful monitoring of these changes is essential to maintain suitable flowability and spreadability. Standard powder sampling devices, for example, as used in pharmaceutical and agricultural industries, are too large to extract AM samples without significant interlayer particle mixing. Therefore, a new compact, single-handedly actuated powder sampler was designed and fabricated for use within a selective laser melting printing chamber to sample AM powders at shallow depths. Samples can be analyzed for changes in size distribution, morphology, and composition (e.g., surface degradation) after each build.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"110 ","pages":"Pages 122-130"},"PeriodicalIF":4.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One-dimensional unsteady modeling of drying and devolatilization of coal particles under pressurized oxy-fuel conditions in fluidized beds 流化床加压氧燃料条件下煤颗粒干燥与脱挥发的一维非定常模型

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-03-01 Epub Date: 2026-01-20 DOI: 10.1016/j.partic.2026.01.012

Yanhong Li , Guosheng Luo , Shijie Wang , Lina You , Haochen Wang

This study develops a one-dimensional unsteady model to simulate the drying and devolatilization of large coal particles (4–12 mm) under pressurized oxy-fuel conditions in fluidized beds. The model reveals that devolatilization time scales quadratically with particle diameter (t ∝ d_p²), confirming heat conduction as the rate-limiting step. Increased system pressure significantly shortens drying and devolatilization times by up to 18 % and 31 %, respectively, but also amplifies intra-particle temperature gradients. Under identical operating conditions, differences between O₂/CO₂ and O₂/N₂ atmospheres were marginal (<5 %). Model predictions agree with experimental measurements within 20 % deviation. The results provide operational guidance for pressurized fluidized bed combustors, emphasizing the strong influence of particle size and pressure on process efficiency and heat transfer limitations, while also highlighting their implications for energy efficiency improvement, emission reduction, and the advancement of environmentally sustainable combustion technologies.

本文建立了一维非稳态模型，模拟了流化床加压氧燃料条件下大颗粒煤（4-12 mm）的干燥和脱挥发过程。模型表明，脱挥发时间随颗粒直径（t∝dp2）呈二次标度，证实了热传导是脱挥发的限速步骤。增加系统压力可显著缩短干燥和脱挥发时间，分别可达18%和31%，但也会放大颗粒内的温度梯度。在相同的操作条件下，O2/CO2和O2/N2气氛之间的差异很小（< 5%）。模型预测与实验测量值的偏差在20%以内。研究结果为加压流化床燃烧器提供了操作指导，强调了颗粒尺寸和压力对过程效率和传热限制的强烈影响，同时也强调了它们对能效提高、减排和环境可持续燃烧技术进步的影响。

{"title":"One-dimensional unsteady modeling of drying and devolatilization of coal particles under pressurized oxy-fuel conditions in fluidized beds","authors":"Yanhong Li , Guosheng Luo , Shijie Wang , Lina You , Haochen Wang","doi":"10.1016/j.partic.2026.01.012","DOIUrl":"10.1016/j.partic.2026.01.012","url":null,"abstract":"<div><div>This study develops a one-dimensional unsteady model to simulate the drying and devolatilization of large coal particles (4–12 mm) under pressurized oxy-fuel conditions in fluidized beds. The model reveals that devolatilization time scales quadratically with particle diameter (<em>t</em> ∝ <em>d</em><sub>p</sub><sup>2</sup>), confirming heat conduction as the rate-limiting step. Increased system pressure significantly shortens drying and devolatilization times by up to 18 % and 31 %, respectively, but also amplifies intra-particle temperature gradients. Under identical operating conditions, differences between O<sub>2</sub>/CO<sub>2</sub> and O<sub>2</sub>/N<sub>2</sub> atmospheres were marginal (<5 %). Model predictions agree with experimental measurements within 20 % deviation. The results provide operational guidance for pressurized fluidized bed combustors, emphasizing the strong influence of particle size and pressure on process efficiency and heat transfer limitations, while also highlighting their implications for energy efficiency improvement, emission reduction, and the advancement of environmentally sustainable combustion technologies.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"110 ","pages":"Pages 109-121"},"PeriodicalIF":4.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphological constants of porous media to predict effective properties for electrochemical devices 多孔介质的形态常数预测电化学器件的有效性能

IF 4.3 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology

Pub Date : 2026-03-01 Epub Date: 2026-01-23 DOI: 10.1016/j.partic.2026.01.017

Jaeyeon Kim , Muhammad Aziz

A comprehensive investigation into the morphology-dependent transport behaviors of porous media is presented in this study. Three-dimensional porous structures representing granular, fibrous, and cellular (foam-like) morphologies, commonly employed in electrochemical devices, were computationally generated and characterized across a porosity range of 0.35–0.85. Structural metrics, including specific surface area, mean pore size, tortuosity, and constrictivity, were quantified and predicted via empirical equations. Transport phenomena, including electrical/thermal conduction, mass diffusion, and permeation, were simulated and quantified using finite-difference and lattice-Boltzmann methods. Results reveal that the properties are significantly governed by both porous morphology and porosity. Empirical correlations that incorporate morphological constants and porosity accurately predict effective properties (e.g., conductivity, diffusivity, and permeability). The proposed morphological constants enable simplified yet accurate predictions of key functional properties, validated against experimental and numerical literature data. This framework provides a practical basis for morphology-driven optimization of porous media across various applications, where simultaneous transport through both solid and pore phases is critical, such as in electrochemistry.

在这项研究中，对多孔介质的形态依赖输运行为进行了全面的研究。三维多孔结构代表颗粒状、纤维状和细胞状（泡沫状）形态，通常用于电化学器件，通过计算生成并表征孔隙度范围为0.35-0.85。结构指标，包括比表面积、平均孔径、弯曲度和收缩度，通过经验方程进行量化和预测。传输现象，包括电/热传导，质量扩散和渗透，模拟和量化使用有限差分和晶格玻尔兹曼方法。结果表明，其性能受孔隙形态和孔隙度的显著影响。结合形态常数和孔隙度的经验相关性可以准确预测有效性质（例如，电导率、扩散率和渗透率）。所提出的形态常数能够简化而准确地预测关键功能属性，并通过实验和数值文献数据进行验证。该框架为各种应用中多孔介质的形态驱动优化提供了实用基础，在这些应用中，同时通过固相和孔相的传输至关重要，例如在电化学中。

{"title":"Morphological constants of porous media to predict effective properties for electrochemical devices","authors":"Jaeyeon Kim , Muhammad Aziz","doi":"10.1016/j.partic.2026.01.017","DOIUrl":"10.1016/j.partic.2026.01.017","url":null,"abstract":"<div><div>A comprehensive investigation into the morphology-dependent transport behaviors of porous media is presented in this study. Three-dimensional porous structures representing granular, fibrous, and cellular (foam-like) morphologies, commonly employed in electrochemical devices, were computationally generated and characterized across a porosity range of 0.35–0.85. Structural metrics, including specific surface area, mean pore size, tortuosity, and constrictivity, were quantified and predicted via empirical equations. Transport phenomena, including electrical/thermal conduction, mass diffusion, and permeation, were simulated and quantified using finite-difference and lattice-Boltzmann methods. Results reveal that the properties are significantly governed by both porous morphology and porosity. Empirical correlations that incorporate morphological constants and porosity accurately predict effective properties (e.g., conductivity, diffusivity, and permeability). The proposed morphological constants enable simplified yet accurate predictions of key functional properties, validated against experimental and numerical literature data. This framework provides a practical basis for morphology-driven optimization of porous media across various applications, where simultaneous transport through both solid and pore phases is critical, such as in electrochemistry.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"110 ","pages":"Pages 180-194"},"PeriodicalIF":4.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0