Particuology最新文献_第5页

Effect of different components in cement raw meal on carbothermal reduction of NOx in flue gas: An experimental study

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-22 DOI: 10.1016/j.partic.2025.02.003

Xiaowei Wang , Jun Cai , Rui Chen , Qiangqiang Ren

{"title":"Effect of different components in cement raw meal on carbothermal reduction of NOx in flue gas: An experimental study","authors":"Xiaowei Wang , Jun Cai , Rui Chen , Qiangqiang Ren","doi":"10.1016/j.partic.2025.02.003","DOIUrl":"10.1016/j.partic.2025.02.003","url":null,"abstract":"<div><div>In China, the cement industry is the third largest source of NO<sub><em>x</em></sub> emissions after thermal power generation and transportation industries. Flue gas carbothermal reduction denitrification technology was proposed by the author team in previous research, and had been proved to be an effective method to cut NO<sub><em>x</em></sub> emissions from coal-fired cement kiln. Based on previous research work, a series of tube furnace experiments were conducted to further clarify the impact laws of different components in cement raw meal (CRM) on NO<sub><em>x</em></sub> reduction when using this method in the present work. Compared with the situation that only pulverized coal exists, adding only calcium carbonate had a slight inhibitory effect on NO reduction, and the maximum reduction efficiency of NO (<em>η</em><sub>max</sub>) dropped to 63.79% from 66.67%. The addition of oxides such as SiO<sub>2</sub>, MgO, Al<sub>2</sub>O<sub>3</sub> and Fe<sub>2</sub>O<sub>3</sub> into the mixture of pulverized coal and CaCO<sub>3</sub> had an impact on the reduction of NO. Overall, metal oxides promoted the reduction of NO, while SiO<sub>2</sub> inhibited the reduction of NO. For positive promotion, Fe<sub>2</sub>O<sub>3</sub> had the most significant effect on the reduction of NO, and <em>η</em><sub>max</sub> reached 89.71% when the addition amount was 4% compared to 63.79% before addition. The promoting effect of metal oxides on NO reduction is: Fe<sub>2</sub>O<sub>3</sub>>MgO>Al<sub>2</sub>O<sub>3</sub>. In addition to Fe<sub>2</sub>O<sub>3</sub>, the influencing law of addition amount of MgO and Al<sub>2</sub>O<sub>3</sub> on NO reduction had also been revealed. The outputs achieved in this study will provide a reference for how to reasonably adjust the ratio of CRM when the flue gas carbothermal reduction denitrification technology is applied into cement industry.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"99 ","pages":"Pages 23-33"},"PeriodicalIF":4.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579039","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

Lithium was extracted from lithium-poor clay ores after short calcination by oxalic acid leaching

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-20 DOI: 10.1016/j.partic.2025.01.019

Fengyuan Wang , Yuchun Yang , Min Yang, Yanling Tian, Hong Yuan

{"title":"Lithium was extracted from lithium-poor clay ores after short calcination by oxalic acid leaching","authors":"Fengyuan Wang , Yuchun Yang , Min Yang, Yanling Tian, Hong Yuan","doi":"10.1016/j.partic.2025.01.019","DOIUrl":"10.1016/j.partic.2025.01.019","url":null,"abstract":"<div><div>Limited research is available on lithium extraction technology for clay-type lithium deposits with relatively low lithium content. In this study, we investigated the effects of lithium extraction from lithium-poor clay ores using oxalic acid. The ore was first calcined and then fully mixed with solid oxalic acid powder, followed by water leaching. Raw material analysis revealed that the primary lithium-containing mineral was cookeite, with a lithium oxide content of 0.57%. The X-ray diffraction (XRD) patterns of the mineral phase before and after calcination at different temperatures revealed that the structure of the ores calcined at 300 and 400 °C was similar to that of the original ore. However, in the XRD patterns of the ore calcined at 500 °C, certain characteristic peaks of cookeite weakened or disappeared. Upon calcination at 600 °C, the hydroxyl group of cookeite was removed, amorphous phase of cookeite appeared, and maximum leaching yield was attained. Using response surface methodology optimization, the optimal calcination temperature and time; acid-to-ore and water-to-ore ratios; and reaction temperature and time were 600 °C and 2 min; 1:1 and 4 mL/g; and 95 °C and 6 h, respectively. The leaching yield under these optimal conditions was 92.33%. The results of this study revealed that lithium ions could be effectively extracted from mines using oxalic acid.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"98 ","pages":"Pages 204-214"},"PeriodicalIF":4.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480230","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

Motion and force characteristics of wet particles in a fluidized bed

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-19 DOI: 10.1016/j.partic.2025.01.017

Zexin Zhong , Xiaoke Ku

引用次数: 0

Propagation characteristics and laws of RDX dust detonation

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-19 DOI: 10.1016/j.partic.2025.01.018

Hanzheng Gong, Qi Zhang, Jingkun Zou

{"title":"Propagation characteristics and laws of RDX dust detonation","authors":"Hanzheng Gong, Qi Zhang, Jingkun Zou","doi":"10.1016/j.partic.2025.01.018","DOIUrl":"10.1016/j.partic.2025.01.018","url":null,"abstract":"<div><div>Compared with industrial dust, explosions involving hexogen (RDX) dust result in more severe consequences. Studying the explosion characteristics of RDX dust cloud in confined spaces is essential for improving industrial safety and military disaster prevention. In this study, a two-dimensional pipeline model was established using numerical simulation methods to investigate the effects of RDX concentration, ignition energy, pipeline length, and length-to-diameter ratio on the characteristics of RDX dust explosions. The results show that the essence of RDX dust explosions is a violent gas-phase chain exothermic reaction, with high-energy decomposition at its core. The explosion intensity increases non-linearly as ignition energy increases. For RDX concentrations of 100, 200, 300, and 400 g/m<sup>3</sup>, the time required to form a stable detonation decreases as the RDX dust concentration increases. When the ignition energy is in the range of 57.23 mJ to 10.1 J, changes in ignition energy have no significant impact on the energy released by the RDX explosion if the ignition energy is small. However, at high ignition energy, the explosive hazard of RDX increases significantly. As pipeline length increases, the stable detonation pressure and propagation velocity of the detonation wave essentially unchanged, but the rebound pressure on the pipeline wall gradually increases. In cases of high length-to-diameter ratios, a flame front reversal phenomenon occurs during the combustion process of RDX dust. In addition, a new dust rapid-filling method was developed using the C language, which enables rapid and uniform dust filling in combustion simulations.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"98 ","pages":"Pages 215-230"},"PeriodicalIF":4.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488636","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

Probing the fine structures of low atomic number catalysts by using electron energy loss spectroscopy

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-16 DOI: 10.1016/j.partic.2025.01.015

Junnan Chen , Ming Lu , Qinhua Gu , Bingsen Zhang

{"title":"Probing the fine structures of low atomic number catalysts by using electron energy loss spectroscopy","authors":"Junnan Chen , Ming Lu , Qinhua Gu , Bingsen Zhang","doi":"10.1016/j.partic.2025.01.015","DOIUrl":"10.1016/j.partic.2025.01.015","url":null,"abstract":"<div><div>Low atomic number catalysts have gained widespread application in areas such as environmental management, catalytic reactions, and energy transformation, thanks to their cost-effectiveness and superior chemical stability. An in-depth exploration of the intricate structures of these catalysts, establishing their structure-activity relationships, and revealing their catalysis mechanisms are fundamental for developing novel and efficient catalysts. Electron energy loss spectroscopy (EELS), a pivotal electron microscopy technique, uniquely excels in dissecting the fine structures of low atomic number catalysts, since its high spatial resolution and acute sensitivity to elements with low atomic numbers. This review summarizes the role of EELS in probing the fine structures of low-Z catalysts, encompassing the technological underpinnings, advantages, and specific use cases in catalyst analysis. EELS can pinpoint the location, chemical surroundings, and electronic attributes of low-Z elements in catalysts, thus offering crucial insights for demystifying catalytic mechanisms and formulating innovative catalysts. Furthermore, this review delves into the potential advancements of EELS technology in the detailed structural study of low atomic number catalysts, hinting at a promising future for this research field.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"98 ","pages":"Pages 154-171"},"PeriodicalIF":4.1,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464847","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

Recoater design for a helical motion binder jet additive manufacturing 3D printer

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-14 DOI: 10.1016/j.partic.2025.01.012

Tarek Mesto, Tugdual Le Néel, Jean-Yves Hascoët

引用次数: 0

Controlling fragment size distribution for modelling the breakage of multi-sphere particles

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-13 DOI: 10.1016/j.partic.2025.01.014

Chao Zhang , Connor O'Shaughnessy , Sadaf Maramizonouz , Vasileios Angelidakis , Sadegh Nadimi

{"title":"Controlling fragment size distribution for modelling the breakage of multi-sphere particles","authors":"Chao Zhang , Connor O'Shaughnessy , Sadaf Maramizonouz , Vasileios Angelidakis , Sadegh Nadimi","doi":"10.1016/j.partic.2025.01.014","DOIUrl":"10.1016/j.partic.2025.01.014","url":null,"abstract":"<div><div>Voro-Pack, an open-source code is introduced to reconstruct real particles into multi-sphere clusters consisting of fragments with controlled size distributions, enabling experiment-informed fragment size distributions (FSD). Two types of silica sand are employed to evaluate the performance of the code, where FSD data are obtained through laser diffraction and sieving, and particle shape information is obtained through micro computed tomography. The results show that the particle sizes and shapes of the multi-sphere clusters generated by the code are in good agreement with those of real particles. It is found that the fragment sizes in the multi-sphere clusters aligned more closely with the real FSD data when laser diffraction data were used as input, compared to sieving. The volume ratio of the multi-sphere clusters to the actual particles is a key factor influencing the size distribution of fragments, with better matching to the actual FSD data when the volume ratio exceeds 0.5 and approaches 1.0. Additionally, the particle shape characteristics do not significantly affect the FSD data in the code-generated clusters. These findings suggest that the Voro-Pack code is an effective tool in reconstructing multi-sphere clusters for particles of various morphologies, providing valuable insights into modelling the breakage of granular materials.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"98 ","pages":"Pages 105-116"},"PeriodicalIF":4.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of drying process of non-spherical particle in a pulsed fluidized bed

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-12 DOI: 10.1016/j.partic.2025.01.013

Hanyu Jin , Shuai Wang , Yurong He

引用次数: 0

Response surface method-based multi-objective optimization of auxiliary air intake in the ash transport tube

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-11 DOI: 10.1016/j.partic.2025.01.011

Lidong Zhang , Changpeng Song , Shoushang Fang , Yuze Zhao , Guohao Li , Qing Wang

{"title":"Response surface method-based multi-objective optimization of auxiliary air intake in the ash transport tube","authors":"Lidong Zhang , Changpeng Song , Shoushang Fang , Yuze Zhao , Guohao Li , Qing Wang","doi":"10.1016/j.partic.2025.01.011","DOIUrl":"10.1016/j.partic.2025.01.011","url":null,"abstract":"<div><div>Computational particle fluid dynamics (CPFD) approach is used to simulate a horizontal tube with an extra air intake. To determine the optimal values for the two objectives, a one-factor hill-climbing test is performed on three structural parameters of the auxiliary air intake (intake velocity, intake angle, and distance between two neighboring valves) and two objective values (operating time and power consumption coefficient). In this paper, a multi-objective optimization of the three structural parameters has been carried out using the response surface methodology and designing a multi-group central test. It was discovered that when the main air intake speed was 3 m/s, adding an auxiliary air intake with an intake speed of 5 m/s, an intake angle of 45°, and a distance of 1900 mm between the two adjoining valves improved particle evacuation. When compared to the situation with a main air intake speed of 5 m/s and no auxiliary air intake, the working time is reduced by 4.97%, and the power consumption coefficient is reduced by 33.51%.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"98 ","pages":"Pages 117-133"},"PeriodicalIF":4.1,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437441","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 on the intra-particle anisotropic transport properties of a beech wood particle during pyrolysis

IF 4.1 2区材料科学

Particuology Pub Date : 2025-02-10 DOI: 10.1016/j.partic.2025.01.006

Andrea Dernbecher , Supriya Bhaskaran , Nicole Vorhauer-Huget , Jakob Seidenbecher , Suresh Gopalkrishna , Lucas Briest , Alba Dieguez-Alonso

{"title":"Investigation on the intra-particle anisotropic transport properties of a beech wood particle during pyrolysis","authors":"Andrea Dernbecher , Supriya Bhaskaran , Nicole Vorhauer-Huget , Jakob Seidenbecher , Suresh Gopalkrishna , Lucas Briest , Alba Dieguez-Alonso","doi":"10.1016/j.partic.2025.01.006","DOIUrl":"10.1016/j.partic.2025.01.006","url":null,"abstract":"<div><div>In the present study, the influence of the dynamic and anistropic pore microstructure of wood and char samples on the intra-particle flow permeability and tortuosity was investigated. To this end, a beech wood sphere was pyrolysed at different temperatures (100 °C, 200 °C, 300 °C, 400 °C, and 500 °C) and characterised, after each pyrolysis step, by X-ray micro-computed tomography (μ-CT). From the μ-CT images, the structural geometry of the particle at the different conversion degrees achieved at each temperature level was extracted. The porosity evolution was characterised, accounting for pores larger than 15 μm, which was the limit of resolution for μ-CT imaging in this study. The structural geometry was divided in subdomains and used for CFD (computational fluid dynamics) simulations, where the pressure loss at different velocities and in different directions with respect to the main pores (vessel cells) was determined and used to estimate the dynamic and anisotropic permeabilities. The permeability differed by an order of magnitude in the direction of the main pores (vessel cells) in comparison to the perpendicular directions, supporting the need to develop permeability tensors for improved simulations of the pyrolysis process at particle level, accounting for the coupled effects of microstructure, transport, and reaction.</div></div>","PeriodicalId":401,"journal":{"name":"Particuology","volume":"98 ","pages":"Pages 172-190"},"PeriodicalIF":4.1,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0