Advanced Powder Technology最新文献_第8页

Experimental study on the influence of water immersion on the combustion and explosion characteristics of coal dust clouds of different ranks 浸水对不同等级煤尘云燃烧和爆炸特性影响的实验研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-26 DOI: 10.1016/j.apt.2024.104734

Lingfeng Wang , Zhengdong Liu , Jinglin Zhang , Zhenguo Du , Shikai Bao , Zhiyang Zhang , Chang Li , Chunmiao Yuan

{"title":"Experimental study on the influence of water immersion on the combustion and explosion characteristics of coal dust clouds of different ranks","authors":"Lingfeng Wang , Zhengdong Liu , Jinglin Zhang , Zhenguo Du , Shikai Bao , Zhiyang Zhang , Chang Li , Chunmiao Yuan","doi":"10.1016/j.apt.2024.104734","DOIUrl":"10.1016/j.apt.2024.104734","url":null,"abstract":"<div><div>In order to elucidate the effects and mechanisms of water immersion on the ignition sensitivity and explosion characteristics of coal dust with different degrees of coalification, this study selected three types of coal dust samples with different ranks. The ignition sensitivity and explosion parameters of the coal dust samples before and after water immersion were measured using Godbert-Greenwald furnaces, Hartmann tubes, and a 20-L explosion chamber. The micro mechanisms causing the variations in the combustion and explosion characteristics of different coal dust samples were analyzed through TG/DTG-DSC and FTIR techniques. The results revealed that water immersion led to a more significant increase in the ignition sensitivity of low-rank coal dust and an overall enhancement in the explosion intensity of coal dust with different ranks. Variations in the characteristic temperatures and ranges of characteristic stages among the water-immersed coal samples of different ranks resulted in distinct changes in ignition behavior and explosion intensity. Furthermore, the water immersion process primarily influenced the hydroxyl functional group content in brown coal, while its impact on higher-rank coal dust samples was primarily observed in the oxygen-containing functional group region.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104734"},"PeriodicalIF":4.2,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722114","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

The flow characteristics of gas–solid two-phase flow in an inclined pipe 倾斜管道中气固两相流的流动特性

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-25 DOI: 10.1016/j.apt.2024.104725

Jiao He , Wei Peng , Mengxi Liu , Xinjun Huang , Shengxian Han

{"title":"The flow characteristics of gas–solid two-phase flow in an inclined pipe","authors":"Jiao He , Wei Peng , Mengxi Liu , Xinjun Huang , Shengxian Han","doi":"10.1016/j.apt.2024.104725","DOIUrl":"10.1016/j.apt.2024.104725","url":null,"abstract":"<div><div>An inclined pipe is an important component in the industrial FCC(fluid catalytic cracking) units that transports the catalyst between the reactor and the regenerator. However, transport failures frequently occur in the inclined pipe because of the different behaviors of gas–solid flow patterns. In this research, the flow parameters of different flow patterns, including the static pressures, pressure gradients, and particle concentrations under the different particle mass flow rates (<em>G</em><sub>s</sub>) were measured and analyzed in an inclined pipe with 150 mm I.D. The <em>G</em><sub>s</sub> and the pressure gradient ranged from 35.43 to 640.71 kg/(m<sup>2</sup>·s), and from 0 to 2,500 Pa/m, respectively. The characteristic parameters suggested that dense-phase flow, transition packed-bed flow, packed-bed flow, and stratified flow may appear sequentially along the inclined pipe from inlet to outlet, which differs from the published model. The new fluid pattern model has successfully diagnosed the particle transport fault in a 3.0 Mt/a FCC unit. This study contributes to a better comprehension of the flow patterns in inclined pipes.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104725"},"PeriodicalIF":4.2,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706205","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

Regulation of synthesis pH value and post-treatment of ZSM-5 for improving adsorption and photocatalytic properties of TiO2/ZSM-5 composites 调节合成 pH 值和 ZSM-5 后处理以改善 TiO2/ZSM-5 复合物的吸附和光催化性能

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-23 DOI: 10.1016/j.apt.2024.104730

Cheng Wang, Fuling Du, Lipeng Wang, Qianru Yu, Xinchao Liang, Siqi Liu, Zhe Lei

{"title":"Regulation of synthesis pH value and post-treatment of ZSM-5 for improving adsorption and photocatalytic properties of TiO2/ZSM-5 composites","authors":"Cheng Wang, Fuling Du, Lipeng Wang, Qianru Yu, Xinchao Liang, Siqi Liu, Zhe Lei","doi":"10.1016/j.apt.2024.104730","DOIUrl":"10.1016/j.apt.2024.104730","url":null,"abstract":"<div><div>TiO<sub>2</sub>/ZSM-5 composites with enhanced adsorption and photocatalytic properties were synthesized via regulation of synthesis pH value and post (acid/alkali) treatment of ZSM-5. The influences of synthesis pH values and post-treatment of ZSM-5 on microstructure, adsorption and photocatalytic properties of the composites were investigated. The methyl orange was used to assess the adsorption and photocatalytic properties of the samples. The results showed that the synthesis pH values and acid/alkali treatment had significant influences on the microstructure, adsorption and photocatalytic properties of TiO<sub>2</sub>/ZSM-5 composites. The composites synthesized at pH 7 had a relatively higher TiO<sub>2</sub> content, smaller anatase crystallite size, greater specific surface area, the most effective separation of photogenerated electron-hole pairs, the fastest interfacial charge transfer, and therefore exhibited excellent adsorption and photocatalytic properties. Acid treatment could significantly increase the specific surface area, Si/Al ratio of ZSM-5, the separation efficiency of photogenerated electron-hole pairs, and amount of produced active free radicals •O<sub>2</sub><sup>–</sup> and •OH. The TiO<sub>2</sub>/acid-treated ZSM-5 exhibited excellent photodegradation with 99.3 % methyl orange in 150 min, which is higher than that of the TiO<sub>2</sub>/ZSM-5 and TiO<sub>2</sub>/alkali-treated ZSM-5.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104730"},"PeriodicalIF":4.2,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706206","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

Innovative fabrication and absorption enhancement in MgO-stabilized ZrO2/graphene composites 氧化镁稳定的氧化锆/石墨烯复合材料的创新制造与吸收增强

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-22 DOI: 10.1016/j.apt.2024.104731

Nan Lu , Qing Meng , Xiaogang Hou , Gaomeilin Sun , Fengshi Yin , Yong Li , Jiangtao Li

{"title":"Innovative fabrication and absorption enhancement in MgO-stabilized ZrO2/graphene composites","authors":"Nan Lu , Qing Meng , Xiaogang Hou , Gaomeilin Sun , Fengshi Yin , Yong Li , Jiangtao Li","doi":"10.1016/j.apt.2024.104731","DOIUrl":"10.1016/j.apt.2024.104731","url":null,"abstract":"<div><div>Developing radiative cooling coatings is an efficient and energy-conserving approach for thermal management in electronic devices. Spectral selectivity is crucial to daytime radiative cooling, typically achieved through complex structure or material designs. This work designs a radiative cooling coating with non-selective spectral characteristics for indoor electronic devices. The MgO-stabilized ZrO<sub>2</sub>/graphene (MSZ/G) powders are prepared in one step through combustion synthesis. Zirconium dioxide powders are utilized as a diluent in the combustion reaction of magnesium powders and carbon dioxide gas. The combustion process can reach a maximum temperature of 1869 °C. This study examines the impact of the diluent content on phase composition, microstructure, and absorptivity. The spectral absorptivity remains nearly constant, reaching up to 0.96, within the spectrum of 2.5–25 μm. The mechanism of absorption enhancement is illustrated in detail. The ZM8A-coated heat sink exhibits a decrease in equilibrium temperature of 9.1 °C when the heat power is 8 W. This outcome validates the effectiveness of non-selective broadband high-emissivity coatings for indoor thermal management. Therefore, this work provides simple and universal guidelines for designing radiative coating of electronic equipment that is not directly irradiated by solar.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104731"},"PeriodicalIF":4.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706225","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

The effect of intermittent mixing on the rate of drying of L-threonine in an agitated filter dryer 间歇性混合对搅拌式过滤干燥器中左旋苏氨酸干燥速率的影响

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-22 DOI: 10.1016/j.apt.2024.104724

Prin Chaksmithanont , Marcella R. Alves , Johannes G. Khinast , Charles D. Papageorgiou , Christopher Mitchell , Justin L. Quon , Benjamin J. Glasser

{"title":"The effect of intermittent mixing on the rate of drying of L-threonine in an agitated filter dryer","authors":"Prin Chaksmithanont , Marcella R. Alves , Johannes G. Khinast , Charles D. Papageorgiou , Christopher Mitchell , Justin L. Quon , Benjamin J. Glasser","doi":"10.1016/j.apt.2024.104724","DOIUrl":"10.1016/j.apt.2024.104724","url":null,"abstract":"<div><div>Intermittent mixing, alternating periods of agitation and no agitation, is often applied during the drying of active pharmaceutical ingredients in agitated filter dryers. Intermittent mixing is used as a strategy to obtain reasonable drying rates without obtaining unacceptable levels of particle attrition. In this work, the impact of intermittent mixing on drying of L-threonine was investigated experimentally. Two process parameters: the agitation ratio (proportion of the total time the agitator is active) and the intermittent cycle number (number of on/off cycles), determine the intensity and distribution of agitation. Increasing the agitation ratio from a static bed, the drying rate initially increased significantly, followed by a gradual increase at higher agitation ratios. Furthermore, the drying rate initially improved with increasing intermittent cycle number, but beyond a critical value reached a plateau. Thus, we observe that additional mixing beyond a critical value provides little benefit in terms of the drying rate but can be detrimental in terms of attrition. These findings provide understanding for development of intermittent mixing protocols.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104724"},"PeriodicalIF":4.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706223","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}

引用次数: 0

Insights into the post-combustion CO2 capture performance of zinc-based zeolitic imidazolate framework (ZIF8)-derived nanocomposites 锌基沸石咪唑盐酸盐框架 (ZIF8) 衍生纳米复合材料燃烧后二氧化碳捕获性能的深入研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-21 DOI: 10.1016/j.apt.2024.104728

Fathima T.K. Sana , Anamika Ghosh , C. Vijayan , Sundara Ramaprabhu

{"title":"Insights into the post-combustion CO2 capture performance of zinc-based zeolitic imidazolate framework (ZIF8)-derived nanocomposites","authors":"Fathima T.K. Sana , Anamika Ghosh , C. Vijayan , Sundara Ramaprabhu","doi":"10.1016/j.apt.2024.104728","DOIUrl":"10.1016/j.apt.2024.104728","url":null,"abstract":"<div><div>We report carbon-zinc oxide (C/ZnO) nanocomposites obtained by a simple, scalable, and cost-effective one-step pyrolysis of a zinc-based zeolitic imidazolate framework (ZIF8) for post-combustion carbon dioxide (CO<sub>2</sub>) capture. The prepared nanocomposites are thoroughly analyzed by different characterization techniques. The CO<sub>2</sub> adsorption–desorption studies performed using thermogravimetric analyzer (TGA) reveal remarkable CO<sub>2</sub> adsorption capacity (∼10 wt% at 30 °C, 1 bar) and excellent CO<sub>2</sub>/N<sub>2</sub> selectivity. The low-pressure CO<sub>2</sub> uptake capacities measured using Brunauer-Emmett-Teller (BET) analyzer corroborate the TGA results. The best sample exhibits an uptake of 3.13 mmol/g at 30 °C, 1 bar. The experimental isotherms obtained using TGA and BET are fitted using suitable kinetic and adsorption models, respectively, to obtain insights into the underlying adsorption mechanisms. The isosteric enthalpy of adsorption calculated from the Virial analysis of the isotherms confirms the physisorption nature. Excellent CO<sub>2</sub> uptake values are also observed in simulated flue gas environments. Additionally, the factors influencing the CO<sub>2</sub> adsorption in these nanocomposites are identified by correlating the physical characterization results with the CO<sub>2</sub> uptake studies. It is inferred that the amorphous carbon in the nanocomposite determines the adsorption capacity and selectivity, whereas the residual ZnO in it controls the adsorption capacity at 0.15 bar and kinetics.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 1","pages":"Article 104728"},"PeriodicalIF":4.2,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706224","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

Numerical simulation of particle consolidation under compression and shear based on the Discrete Element method 基于离散元素法的压缩和剪切作用下颗粒固结的数值模拟

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-15 DOI: 10.1016/j.apt.2024.104722

Yunzhou Qian , Shane P. Usher , Peter J. Scales , Anthony D. Stickland , Alessio Alexiadis

{"title":"Numerical simulation of particle consolidation under compression and shear based on the Discrete Element method","authors":"Yunzhou Qian , Shane P. Usher , Peter J. Scales , Anthony D. Stickland , Alessio Alexiadis","doi":"10.1016/j.apt.2024.104722","DOIUrl":"10.1016/j.apt.2024.104722","url":null,"abstract":"<div><div>This study introduces a three-dimensional (3D) Discrete Element Method (DEM) model designed to simulate particle consolidation under simultaneous compression and shear forces. The model is validated against experimental data for pure compression scenarios. Simulations involving simultaneous compression and shear are conducted to understand the impact of varying shear-to-compression ratios on particle consolidation. High shear-to-compression ratios lead to denser particle clusters, showing that shear promotes increased solid volume fractions. Additionally, the study explores the influence of different particle–particle interaction models, specifically the Derjaguin-Muller-Toporov (DMT) and Johnson-Kendall-Roberts (JKR) models. The results indicate that the DMT model generally leads to denser, more compact aggregates, whereas the JKR model tends to produce aggregates with a more elongated structure. Different agglomeration patterns were also found, which were classified as ‘shear-dominated’, ‘plateau’ and ‘compression-dominated’.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 12","pages":"Article 104722"},"PeriodicalIF":4.2,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656258","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}

引用次数: 0

Corrigendum to “Enhancement of luminescence and thermal stability in Eu3+-doped K3Y(BO2)6 with Li+ and Na+co-doping” [Adv. Powder Technol. 35 (2024) 104695] 掺杂 Li+ 和 Na+ 的 Eu3+ 掺杂 K3Y(BO2)6 的发光和热稳定性增强》更正[Adv. Powder Technol.

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-14 DOI: 10.1016/j.apt.2024.104726

U.H. Kaynar , H. Aydin , Abeer S. Altowyan , J. Hakami , M.B. Coban , M. Ayvacikli , E. Ekdal Karali , A. Canimoglu , N. Can

引用次数: 0

Preparation of N-doped nanoporous carbon from ZIF-8 metal-organic framework via ultrasonic spray pyrolysis 通过超声喷雾热解从 ZIF-8 金属有机框架制备掺 N 纳米多孔碳

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-14 DOI: 10.1016/j.apt.2024.104727

Masaru Kubo, Akito Kawamoto, Manabu Shimada

{"title":"Preparation of N-doped nanoporous carbon from ZIF-8 metal-organic framework via ultrasonic spray pyrolysis","authors":"Masaru Kubo, Akito Kawamoto, Manabu Shimada","doi":"10.1016/j.apt.2024.104727","DOIUrl":"10.1016/j.apt.2024.104727","url":null,"abstract":"<div><div>N-doped nanoporous carbon (NPC) was synthesized from ZIF-8 metal–organic framework via a one-step ultrasonic spray pyrolysis (USP) process and evaluated as a supercapacitor electrode material. The USP method involves ultrasonic nebulization of a ZIF-8 suspension, formation of agglomerates by preheating the droplets, and carbonizing the agglomerates at 1100 °C to yield USP-NPC. For comparison, conventional ZIF-8-derived NPC (c-NPC) and spray-dried ZIF-8 derived NPC (SD-NPC) were also prepared. USP-NPC consists of spherical dense submicron particles with a BET surface area of 1059 m<sup>2</sup>/g and high N content (6.4 at%). Electrochemical tests revealed that USP-NPC exhibited superior supercapacitance performance (249.7F/g at 0.5 A/g) and 10000-cycles durability compared to c-NPC and SD-NPC. The enhanced performance of USP-NPC is attributed to its spherical morphology, high surface area, and rich N-doping. This study demonstrates that the USP method is a promising approach for the facile synthesis of high-performance NPC electrode materials for supercapacitor applications.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"35 12","pages":"Article 104727"},"PeriodicalIF":4.2,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142656256","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

Simulations of hydrodynamics of droplet coating process using airless rotary sprayers 使用无气旋转喷雾器对液滴喷涂过程进行流体力学模拟

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2024-11-14 DOI: 10.1016/j.apt.2024.104686

Li Xiang , Xiang Yang , Chen Xing , Li Jinze , Wang Tong , Xia Xietian

引用次数: 0