Advanced Powder Technology最新文献_第8页

A comparative investigation on bubble dynamics in gas–solid separation fluidized bed using Geldart A, B, D and Geldart A- particle 使用 Geldart A、B、D 和 Geldart A- 粒子对气固分离流化床中气泡动力学的比较研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-05 DOI: 10.1016/j.apt.2024.104637

Yangfan Xu , Dan Wang , Liang Dong , Yuqing Feng , Zhi Zhang , Xiaoyang Wei , Chenlong Duan , Chenyang Zhou

{"title":"A comparative investigation on bubble dynamics in gas–solid separation fluidized bed using Geldart A, B, D and Geldart A- particle","authors":"Yangfan Xu , Dan Wang , Liang Dong , Yuqing Feng , Zhi Zhang , Xiaoyang Wei , Chenlong Duan , Chenyang Zhou","doi":"10.1016/j.apt.2024.104637","DOIUrl":"10.1016/j.apt.2024.104637","url":null,"abstract":"<div><p>Dense medium has a certain impact on the separation efficiency of gas–solid fluidized bed separation. Geldart A<sup>-</sup> particle, a new type of dense medium, can effectively improve the expansion of the emulsion phase and the separation efficiency in the fluidized bed. This work is aimed to investigate the differences of bubble dynamics for Geldart A, B, D and A<sup>-</sup> particle fluidized beds with digital image analysis technology in a two-dimensional gas–solid fluidized bed. The bubble number and size distributions are consistent with those in literature for Geldart A, B and D particle fluidized beds. The bubble size is smaller for Geldart A<sup>-</sup> particle fluidized beds. Due to the bubble rupture neglected in the Darton bubble growth model, a new correlation based Darton bubble growth model has been extended, which has approximately 15% accuracy region. Additionally, the bubble rising velocity was studied. The extended Davidson correlation, which has approximately 15% accuracy region, is a good method to predict the bubble rising velocity. Thus, the separation efficiency of gas–solid fluidized bed separation could be improved for Geldart A<sup>-</sup> particle.</p></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 10","pages":"Article 104637"},"PeriodicalIF":4.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150708","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

Fire-retardant, smoke-suppressive and sustainable diatomite-based auxiliaries for highly fire-resistant epoxy resin 用于高防火环氧树脂的阻燃、抑烟和可持续硅藻土基助剂

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-05 DOI: 10.1016/j.apt.2024.104639

Jianjian Luo , Keqing Zhou , Bei Tu , Yongqian Shi , Kaihua Lu , Xiaodong Qian , Congling Shi

{"title":"Fire-retardant, smoke-suppressive and sustainable diatomite-based auxiliaries for highly fire-resistant epoxy resin","authors":"Jianjian Luo , Keqing Zhou , Bei Tu , Yongqian Shi , Kaihua Lu , Xiaodong Qian , Congling Shi","doi":"10.1016/j.apt.2024.104639","DOIUrl":"10.1016/j.apt.2024.104639","url":null,"abstract":"<div><p>Herein, a novel flame retardant and smoke suppression auxiliaries was synthesized with the motivation of sustainability strategy. Porous diatomite (p-DIA) as a purely natural raw material and melamine formaldehyde-phytic acid (MFPA) as a synergist to produce DMFPA, which acts as the novel auxiliaries to endow epoxy resin (EP) with excellent fire safety. The thermal stability of EP composites with 15 wt% DMFPA was improved, as evidenced by a 31.0% reduction in its maximum thermal decomposition rate and an enhancement of residual char to 22.7 wt%. Moreover, EP composites also exhibited superior flame retardant and smoke reduction properties, as reflected by its peak heat release rate (PHRR), peak smoke release rate (PSPR), peak CO release rate and smoke factor (SF) that were 56.5%, 56.3%, 58.7% and 77.7% less than those of unmodified EP, respectively. These results correlated strongly with the powerful adsorption of smoke and flammable debris by porous diatomite, the physical barrier effect of the highly stable expanded char layer facilitated by DMFPA, the dilution effect of non-flammable gases resulted from pyrolysis by melamine and the free radicals quenching effect produced by phytic acid.</p></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 10","pages":"Article 104639"},"PeriodicalIF":4.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150707","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

Study on the synergistic effect of sodium oleate/salicylaldoxime mixed collector co-adsorption on cassiterite flotation 油酸钠/水杨醛肟混合捕收剂共吸附对锡石浮选的协同效应研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-05 DOI: 10.1016/j.apt.2024.104634

Shan Huang , Lingyun Huang , Qiaolei Li , Jianhan Zhou , Yonghong Xu , Jinfang Lv , Xian Xie

{"title":"Study on the synergistic effect of sodium oleate/salicylaldoxime mixed collector co-adsorption on cassiterite flotation","authors":"Shan Huang , Lingyun Huang , Qiaolei Li , Jianhan Zhou , Yonghong Xu , Jinfang Lv , Xian Xie","doi":"10.1016/j.apt.2024.104634","DOIUrl":"10.1016/j.apt.2024.104634","url":null,"abstract":"<div><p>Cassiterite, a vital source of tin, is commonly separated via flotation. This study presented a mixed collector comprising sodium oleate (NaOL) and salicylaldoxime (SAOX) for cassiterite flotation. Micro-flotation experiments showed that the recovery of cassiterite increased to above 90 % upon adding mixed NaOL/SAOX collectors under the concentration of 0.6*10<sup>−4</sup> mol L<sup>−1</sup> with a molar ratio of 1:3 at pH 7. The classical first-order model offered the most suitable fit for the experimental data. It exhibited fast-floating behavior as the k value of cassiterite increases to 1.77 under the mixed collector system. Zeta potential measurements revealed that both NaOL and SAOX could adsorb onto the cassiterite surface. The mixed collector NaOL/SAOX leads to a significant change in the zeta potential of cassiterite, indicating that this mixed collector may interact with the surface of cassiterite. Contact angle measurements indicated that the mixed collector increased the contact angle of cassiterite, thereby enhancing its hydrophobicity. FTIR analysis revealedthe chemical adsorption and synergistic effect of the mixed collectors on the cassiterite surface. XPS analysis further confirmed this synergism on the cassiterite surface. Overall, this paper introduces a mixed collector for cassiterite flotation, elucidates the synergistic adsorption mechanism of NaOL and SAOX on the cassiterite surface, and provides a new approach for improving the flotation efficiency of cassiterite.</p></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 10","pages":"Article 104634"},"PeriodicalIF":4.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151186","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

Synthesis of Ni@MgO core–shell ultrafine particles for the fabrication of thick film electrodes 合成用于制造厚膜电极的 Ni@MgO 核壳超细粒子

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-03 DOI: 10.1016/j.apt.2024.104642

Liubin Shi, Hao Deng, Yuanzhi Chen, Shilong Xiong, Jindong Li, Dong-Liang Peng

{"title":"Synthesis of Ni@MgO core–shell ultrafine particles for the fabrication of thick film electrodes","authors":"Liubin Shi, Hao Deng, Yuanzhi Chen, Shilong Xiong, Jindong Li, Dong-Liang Peng","doi":"10.1016/j.apt.2024.104642","DOIUrl":"10.1016/j.apt.2024.104642","url":null,"abstract":"<div><p>Ultrafine Ni particles are important materials for the fabrication of electrodes for multilayer ceramic capacitors (MLCCs). However, the problems of particle oxidation and thermal shrinkage mismatch still need to be resolved. Herein, Ni@MgO core–shell ultrafine particles are prepared by a method in which Mg(OH)<sub>2</sub> shells are coated on pre-synthesized Ni ultrafine particles by a chemical solution method. After heat treatment, the Mg(OH)<sub>2</sub> shells decompose into MgO shells, and Ni@MgO core–shell structure is therefore formed. The as-prepared Ni and Ni@MgO core–shell ultrafine particles are further made into pastes, printed on ceramic substrate and sintered into conductive films. In comparison with pure Ni particles, enhanced performances of anti-oxidation and thermal shrinkage resistance are achieved for Ni@MgO core–shell particles. The sintered films made by pure Ni particles exhibits a severe shrinkage with a large area of disconnected regions whereas the Ni@MgO core–shell films show much better film integrality. The results suggest that coating MgO shells on Ni ultrafine particles to form a core–shell structure can be an effective way to reduce the thermal shrinkage and improve the integrity of Ni electrode for the potential applications of MLCCs.</p></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 10","pages":"Article 104642"},"PeriodicalIF":4.2,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142128941","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

Study on the performance of downhole spiral-cyclone coupling separator for natural gas hydrate 天然气水合物井下螺旋-旋流耦合分离器性能研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-03 DOI: 10.1016/j.apt.2024.104638

Yang Tang , Na Xie , Yufa He , Yunjian Zhou , Zeliang Li , Guorong Wang

{"title":"Study on the performance of downhole spiral-cyclone coupling separator for natural gas hydrate","authors":"Yang Tang , Na Xie , Yufa He , Yunjian Zhou , Zeliang Li , Guorong Wang","doi":"10.1016/j.apt.2024.104638","DOIUrl":"10.1016/j.apt.2024.104638","url":null,"abstract":"<div><p>Aiming at the problems of reservoir collapse and pipeline blockage caused by serious sand production in the exploitation of natural gas hydrate, the downhole spiral-cyclone coupled in-situ separator is used for sand removal. The separator structure is determined by the physical parameters and empirical formulas. The structure is analyzed and optimized by CFD numerical simulation. The optimal structural parameters of the separator are obtained: the position of the vortex guide plate is 28 mm, the number of inlets is 6, the spiral flow channel structure is a circular section, the number of spiral lines is 2, and the depth of the overflow pipe is 100 mm. At this time, the sand removal efficiency of the separator is 89.55 %. The experimental verification was carried out. The maximum sand removal efficiency of the indoor test was 84.46 %, and the relative error with the simulation was 5.51 %. Through the comparison between experimental phenomena and numerical simulation, it is clear that the spiral-cyclone coupling separator has good performance in the separation and sand removal of natural gas hydrate underground mining. The research in this paper can provide some reference for the design and optimization of natural gas hydrate downhole in-situ separators.</p></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 10","pages":"Article 104638"},"PeriodicalIF":4.2,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142128940","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

Full title (Editorial Board Members) 全称（编辑委员会成员）

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-01 DOI: 10.1016/S0921-8831(24)00304-2

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Inside Front Cover (Aims & Scope, Editors) 封面内页（目标与范围，编辑）

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-09-01 DOI: 10.1016/S0921-8831(24)00303-0

引用次数: 0

Influence of mineral filler characteristics on the filler–asphalt interfacial behavior 矿物填料特性对填料-沥青界面行为的影响

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-27 DOI: 10.1016/j.apt.2024.104636

Baodong Xing , Chen Fang , Xiaobo Lyu , Weiyu Fan , Yuchao Lyu

{"title":"Influence of mineral filler characteristics on the filler–asphalt interfacial behavior","authors":"Baodong Xing , Chen Fang , Xiaobo Lyu , Weiyu Fan , Yuchao Lyu","doi":"10.1016/j.apt.2024.104636","DOIUrl":"10.1016/j.apt.2024.104636","url":null,"abstract":"<div><p>The knowledge of mineral filler characteristics and their impacts on filler–asphalt interfacial behavior is not systematic and completed yet. In this paper, eight mineral fillers prepared using the same milling procedure were investigated. The filler–asphalt interfacial behavior was analyzed by differential scanning calorimetric and dynamic shear rheometer tests. Results reveal that in contrast to form factor and specific surface area, particle porosity, particle density, aspect ratio, angularity index, fractal dimension and feature roughness decrease with decreasing particle size. Limestone filler exhibits more regular shape, less significant angularity and richer surface texture than basalt filler. Of all particle characteristics studied, form factor and specific surface area are suggested to be the determining factors affecting filler–asphalt interfacial behavior. Moreover, microscopic morphology analysis provides an insight to interpret the differences explored in mastic interfacial property. The results help employ applicable particle characteristics that fabricate mastic with a stable interface system.</p></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 10","pages":"Article 104636"},"PeriodicalIF":4.2,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142089370","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

Simple and sustainable synthesis of loosely stacked nano-H-ZSM-5 aggregates from kaolin and catalytic studies 从高岭土中简单、可持续地合成松散堆积的纳米 H-ZSM-5 聚集体并进行催化研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-27 DOI: 10.1016/j.apt.2024.104635

Hu Wen , Yuxin Li , Haitao Yin , Wei Wang , Zhengchao Jin , Shunyu Han , Nanzhe Jiang

引用次数: 0

Exploring the disintegration mechanism of dissolved natural plant products tablets based on pore structure control 基于孔隙结构控制的天然植物溶解片剂崩解机理探索

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-08-23 DOI: 10.1016/j.apt.2024.104586

Zhenda Liu , Xiao Lin , Yanlong Hong , Lijie Zhao , Lan Shen

{"title":"Exploring the disintegration mechanism of dissolved natural plant products tablets based on pore structure control","authors":"Zhenda Liu , Xiao Lin , Yanlong Hong , Lijie Zhao , Lan Shen","doi":"10.1016/j.apt.2024.104586","DOIUrl":"10.1016/j.apt.2024.104586","url":null,"abstract":"<div><p>Porosity variations have an impact on the disintegration behavior of tablets whereas the influence on the disintegration characteristics of natural plant product (NPP) tablets has not been extensively studied. Revealing the pore structure of NPP tablets provides a new and important clue to elucidate the phenomenal behavior and underlying mechanisms of tablet disintegration. In this study, the effect of porosity variation on disintegration of NPP tablets was evaluated for the first time. The disintegration performance of NPP tablets was evaluated using tablet attributes, disintegration kinetics, and the wicking process. Mercury intrusion porosimetry (MIP) and X-ray computed microtomography (XμCT) were used to characterize the microstructure of the tablets. <em>Curcuma Longa</em> Linn. extractions were compacted into tablets with different solid fractions. Tablet qualities changed significantly with increasing porosity. An increase in the wicking rate with porosity changed by visualizing the wicking process. The disintegration kinetics of tablets showed a sensitive variation after an increase in porosity. The pore structure of tablets including parameters such as pore size distribution, tortuosity, and connectivity were identified as direct drivers of wicking and disintegration. The current study provides new insights into the disintegration mechanism of dissolved NPP tablets by exploring the evolution of the pore microstructure.</p></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 10","pages":"Article 104586"},"PeriodicalIF":4.2,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142044978","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