Advanced Powder Technology最新文献

{"title":"A hybrid EMD-GRU model for pressure prediction in air cyclone centrifugal classifiers","authors":"Haishen Jiang ,&nbsp;Wenhao Li ,&nbsp;Yuhan Liu ,&nbsp;Runyu Liu ,&nbsp;Yadong Yang ,&nbsp;Chenlong Duan ,&nbsp;Long Huang","doi":"10.1016/j.apt.2024.104743","DOIUrl":"10.1016/j.apt.2024.104743","url":null,"abstract":"<div><div>Predicting the pressure in air cyclone centrifugal classifiers is important for analyzing the flow field and improving classification performance, but traditional methods struggle due to the presence of noise in the pressure signals. In this study, a model combining empirical mode decomposition (EMD) and gate recurrent unit (GRU) is proposed and genetic algorithm (GA) is used to further increase the prediction accuracy of the model. The air pressure at the feeding port, fine particle discharge port and coarse particle discharge port of the air classifier are selected for prediction and the intrinsic mode functions (IMFs) with high correlation are selected for the denoising effect using EMD and the Pearson correlation coefficient (PCC). Signal denoising facilitates better feature extraction and simplifies neural network models. The results show that the best prediction among five models is achieved by the EMD-GRU model, with a root mean square error (RMSE) of 0.0549, 0.0177, and 0.0203 for the three ports. In addition, the effects of different parameters on the classification efficiency of the air classifier are investigated. The results reveal that the air classifier can achieve the best classification effect when the rotational frequency is 10.83 Hz, the feeding rate is 0.4 kg/s and the inclination angle is −4°. This study introduces a new idea for pressure prediction and flow field simulation in air classifiers and provides a new reference for optimizing the classification performance of air cyclone centrifugal classifiers.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104743"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102540","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":"Multi-element synergistic effect based on functionalized porphyrin organic frameworks: Towards for promoting fire safety of epoxy","authors":"Jiale Zhang ,&nbsp;Lian Yin ,&nbsp;Jianjian Luo ,&nbsp;Keqing Zhou ,&nbsp;Yongqian Shi ,&nbsp;Bin Yu ,&nbsp;Jiawei Wu ,&nbsp;Yichao Lin","doi":"10.1016/j.apt.2024.104759","DOIUrl":"10.1016/j.apt.2024.104759","url":null,"abstract":"<div><div>Epoxy resins (EP) is classic thermosetting material, but its flammability severely limits its usage. In this paper, a novel flame retardant (FePor@PZS) was synthesized by growing polyphosphazene (PZS) in situ onto the surface of iron porphyrin organic frameworks (FePor). Attributed to the synergistic flame retardant system of nitrogen, phosphorus and iron elements, FePor@PZS endowed excellent fire safety property to EP. Upon incorporating 2 wt% FePor@PZS, EP/FePor@PZS got an LOI value of 27.3%, achieving the V-1 level in the test of UL-94. Besides, the peak rate of heat release, release of total heat, peak rate of smoke production, production of total smoke, peak rate of CO₂ production and peak rate of CO production of EP/FePor@PZS were decreased by 31.8%, 21.5%, 17.5%, 22.3%, 34.8% and 73.5%, respectively, and the quantity of residual carbon increased from 9.69% to 27.86%, compared with neat EP. FePor could break off to form a single pyrrole ring to promote the generation of the early carbon layers. Additionally, the Fe element in FePor and the P element in PZS played a role of catalytic carbonization. Meanwhile, PZS could decompose into non-combustible gases, and produce PO• and HPO• radicals to terminate the EP chain-opening reaction. This research gives a novel approach for the application of porphyrin derivatives in flame retardant composites.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104759"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102509","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":"Study on the influence of pre-injection blocking fluid on the pore and fracture structure of coal and its seepage law","authors":"Fuqian Wan ,&nbsp;Lulu Sun ,&nbsp;Guansheng Qi ,&nbsp;Quanlin Shi ,&nbsp;Haishan Wang ,&nbsp;Mingyu Zhan ,&nbsp;Shoulei Duan","doi":"10.1016/j.apt.2024.104733","DOIUrl":"10.1016/j.apt.2024.104733","url":null,"abstract":"<div><div>To study the influence of pre-injection blocking fluid on the pore and fracture structure of coal and its seepage law, CT three-dimensional reconstruction technology was used to characterize the coal structure. Using Comsol software to simulate the flow characteristics of the blocking fluid in the fractures of coal. At 200 °C, compared with the untreated coal, the specific surface area, pore volume, and connectivity of the treated coal show the most significant changes, reducing by 24.24 %, 32.87 %, and 7.04 %, respectively. When the injection pressure of the blocking liquid is 3.1 MPa, the overall flow velocity of the blocking liquid is relatively high, and the maximum flow velocity occurs at the larger pore size where the blocking liquid has fully developed, that is, at the cross-sectional position of 192 μm. Research has shown that changes in coal structure can affect the flow characteristics of the blocking fluid inside the coal. At 200 °C, the inhibitory ability of the blocking liquid on the pore and fracture structure and connectivity development of the coal sample is stronger, which can suppress the circulation of oxygen inside the coal sample and is more conducive to the prevention and control of coal spontaneous combustion fires. The research results provide valuable technical support for the evaluation of the fire prevention and extinguishing effects of pre-injection inhibitors and the optimization of technology.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104733"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102541","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":"Corrigendum to “Development of ions adsorption onto nanoparticles from water/wastewater sources via novel nanocomposite materials: A machine learning-based approach [Adv. Powder Technol. 35(6) (2024) 104462]","authors":"Sirajunisa Talath ,&nbsp;Adil Farooq Wali ,&nbsp;Sathvik B. Sridhar ,&nbsp;Umme Hani ,&nbsp;Muteb Alanazi ,&nbsp;Tareq Nafea Alharby","doi":"10.1016/j.apt.2024.104752","DOIUrl":"10.1016/j.apt.2024.104752","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104752"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143092217","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":"Inside Front Cover (Aims & Scope, Editors)","authors":"","doi":"10.1016/S0921-8831(24)00450-3","DOIUrl":"10.1016/S0921-8831(24)00450-3","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104773"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102018","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":"Development of naked pDNA inhalation powder formulation with high transfection efficiency using hyaluronic acid and phenylalanine as excipients","authors":"Takaaki Ito ,&nbsp;Tomoyuki Okuda ,&nbsp;Seiko Uede ,&nbsp;Yuki Kushi ,&nbsp;Kohei Tahara ,&nbsp;Hirokazu Okamoto","doi":"10.1016/j.apt.2024.104750","DOIUrl":"10.1016/j.apt.2024.104750","url":null,"abstract":"<div><div>Nucleic acid-based inhalational drugs hold great clinical promise, but development has been limited by poor transfection efficiency among other factors. We previously described a plasmid (p)DNA powder without vector (naked pDNA powder) prepared for inhalation by spray-freeze-drying and containing hyaluronic acid (HA) as an excipient that demonstrated high transfection efficiency in the lungs. In the present study, we describe modified formulations in which HA is partially replaced by hydrophobic amino acids to enhance dispersibility in air and HA molecular weight is optimized for greater transfection efficiency. <em>In vivo</em> experiments in mice revealed that L-phenylalanine (Phe) in combination with HA conferred higher transfection efficiency than other hydrophobic amino acids. Furthermore, both <em>in vivo</em> and <em>in vitro</em> assays demonstrated that 50 kDa HA conferred higher transfection efficiency than other molecular weights and that the naked pDNA powder composed of 73% HA (50 kDa) and 25% Phe yielded the highest transfection efficiency among powders investigated. A higher relative Phe ratio enhanced aerosol performance but yielded lower transfection efficiency. This trade-off highlights the importance of comprehensively evaluating inhalational powders for both intrinsic transfection efficiency and aerosol performance.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104750"},"PeriodicalIF":4.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143102585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inside Front Cover (Aims & Scope, Editors)","authors":"","doi":"10.1016/S0921-8831(24)00413-8","DOIUrl":"10.1016/S0921-8831(24)00413-8","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 12","pages":"Article 104736"},"PeriodicalIF":4.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745415","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":"Full title (Editorial Board Members)","authors":"","doi":"10.1016/S0921-8831(24)00414-X","DOIUrl":"10.1016/S0921-8831(24)00414-X","url":null,"abstract":"","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 12","pages":"Article 104737"},"PeriodicalIF":4.2,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142745416","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":"Innovative dispersant for reducing heterogeneous coagulation of pentlandite and serpentine and new insight for their dispersion","authors":"Yuxin Xie ,&nbsp;Jiwei Lu ,&nbsp;Ruibiao Hu ,&nbsp;Nailing Wang ,&nbsp;Zhijian Wang ,&nbsp;Zhitao Yuan ,&nbsp;Lixia Li","doi":"10.1016/j.apt.2024.104746","DOIUrl":"10.1016/j.apt.2024.104746","url":null,"abstract":"<div><div>Serpentine is easily muddy and has a high zero electric point of zero charge (PZC), which leads to heterogeneous coagulation with pentlandite, which seriously affects the flotation of pentlandite. To solve this problem, from the new perspective of reducing the heterogeneous coagulation of pentlandite-serpentine and dispersing them, this study explored the influence of sodium tungstate as a dispersant on the dispersion of between pentlandite and serpentine using flotation tests, zeta potential tests, scanning electron microscope-energy dispersive spectrometer (SEM-EDS) examination, molecular dynamics simulation (MS), and calculations of the extended Derjaguin-Landau-Verwey-Overbeek (EDLVO) theory. The results show that −20 μm fine serpentine seriously deteriorates the flotation of pentlandite, while adding sodium tungstate can significantly promote the flotation separation of pentlandite and serpentine. MS simulation results showed that sodium tungstate could be chemisorbed with iron ions on the surface of pentlandite and mainly physisorbed with serpentine. EDLVO theoretical calculations show that after adsorption of sodium tungstate, the interaction between the two changed from attraction to repulsion at pH less than 10, and the mutual attraction was weakened at pH more significant than 10, thus weakening the heterogeneous coagulation between pentlandite and serpentine and causing serpentine to desorb from the surface of pentlandite, thus restoring the floatability of pentlandite, which SEM-EDS also confirmed. This provides a new insight into the dispersion mechanism of sodium tungstate as the innovative dispersant that is different from other dispersants for reducing heterogeneous coagulation of pentlandite and serpentine.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104746"},"PeriodicalIF":4.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746544","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":"Comprehensive analysis of Cu-doped CoFe2O4 nanocrystals: Structural, morphological, optoelectronic, and magnetic properties","authors":"Anchal ,&nbsp;Sarita ,&nbsp;Narendra Jakhar ,&nbsp;P.A. Alvi ,&nbsp;B.L. Choudhary","doi":"10.1016/j.apt.2024.104748","DOIUrl":"10.1016/j.apt.2024.104748","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The aim of this research is to fabricate nanocrystalline &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;mi&gt;u&lt;/mi&gt;&lt;/mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;mi&gt;o&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;-&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;/mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; materials, where x takes values of 0.1, 0.3, and 0.5, and to analyse how their structural, morphological, optoelectronic, vibrational, and magnetic properties change with varying levels of Cu&lt;sup&gt;2+&lt;/sup&gt; doping. The preparation of copper-doped cobalt ferrite samples was conducted using the sol–gel method, with citric acid serving as a chelating agent. Powder X-ray diffraction measurements were conducted to identify the phase and structural attributes of the synthesized copper-doped cobalt ferrite. The Rietveld refinement clearly indicates the single-phase cubic structure, characterized by the Fd-3 m space group. The Debye Scherrer formula was used for the calculation of the crystallite size and it was discovered that the average crystallite size varied from ∼ 4.5 to 5.4 nm (which is less than 10 nm) as the doping concentration of Cu&lt;sup&gt;2+&lt;/sup&gt; was increased. For the surface morphological studies, Field Emission Scanning Electron Microscopy (FESEM) was used, which suggest that all samples are well prepared and are spherical in nature. EDAX analysis validated the elemental composition with appropriate doping in crystalline samples of &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;mi&gt;u&lt;/mi&gt;&lt;/mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;mi&gt;o&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;-&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;/mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. The existence of different chemical bonds has been verified by the Fourier Transform Infrared Rays (FTIR) Spectroscopy. The Raman spectra analysis indicated the existence of various vibrational modes within the sample, revealing the presence of four distinct Raman modes: A1g, Eg, and 2 T2g. Further, the Photoluminescence spectroscopy (PL) was utilized to explore the luminescent properties of the synthesized sample. The optical characteristics was studied using UV–Visible spectroscopy and it was observed that with an increase in the Cu&lt;sup&gt;2+&lt;/sup&gt; concentration, the band gap decreased from 2.466 eV to 2.299 eV. X-ray photoelectron spectroscopy (XPS) was used to analyse the chemical states of the elements present in &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;mi&gt;u&lt;/mi&gt;&lt;/mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;C&lt;/mi&gt;&lt;mi&gt;o&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;-&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;/mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; nanoparticles. Furthermore, the magnetic characteristics of the synthesized copper-doped cobalt nanoferrites were examined using a Vibrating Sample Magnetometer (VSM). The hysteresis curves demonstrated low coercivity (H&lt;sub&gt;c&lt;/sub&gt;","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104748"},"PeriodicalIF":4.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142746545","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}