{"title":"Comprehensive study on cluster characteristics with different particle properties in the diameter-varying fluidized bed reactor","authors":"Wu Gongpeng, Li Yanna, Sun Liangzhao, He Yan","doi":"10.1016/j.powtec.2025.120754","DOIUrl":null,"url":null,"abstract":"<div><div>Particle property plays an important role in cluster motion for gas-solid two-phase flow. However, the relationship between particle property and cluster motion in the diameter-varying riser is unclear. Thus, the complicated influence mechanisms of particle density and diameter on cluster motion in the diameter-varying riser are studied experimentally. Four types of solid particles serve as bed material and solid concentration data recorded by optical fiber probe are used to analyze cluster motion characteristics. The results show that cluster motion characteristics intensify in the enlarged segment with increasing particle density and diameter. The effects of solid flux and gas velocity on particle cluster tend to increase when particle density and diameter increase. Additionally, particle property exerts significant impacts on cluster motion in the enlarged segment compared to the straight segment. At the same solid concentration, cluster holdup depends more on particle density rather than particle diameter.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120754"},"PeriodicalIF":4.5000,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032591025001494","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Particle property plays an important role in cluster motion for gas-solid two-phase flow. However, the relationship between particle property and cluster motion in the diameter-varying riser is unclear. Thus, the complicated influence mechanisms of particle density and diameter on cluster motion in the diameter-varying riser are studied experimentally. Four types of solid particles serve as bed material and solid concentration data recorded by optical fiber probe are used to analyze cluster motion characteristics. The results show that cluster motion characteristics intensify in the enlarged segment with increasing particle density and diameter. The effects of solid flux and gas velocity on particle cluster tend to increase when particle density and diameter increase. Additionally, particle property exerts significant impacts on cluster motion in the enlarged segment compared to the straight segment. At the same solid concentration, cluster holdup depends more on particle density rather than particle diameter.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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