China Particuology最新文献_第7页

Fluidization in combined acoustic-magnetic field for mixtures of ultrafine particles 超细颗粒混合的声-磁复合流态化

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2007.01.007

Huie Liu, Qingjie Guo

引用次数: 10

Ferrimagnetic ceramic adsorbents for cleanup of H2S from exhaust gases 用于清除废气中硫化氢的铁磁陶瓷吸附剂

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2007.01.002

Bernd Halbedel , Apostolos Kontogeorgakos

引用次数: 3

Synthesis and characterization of monosize magnetic poly(glycidyl methacrylate) beads 单粒径磁性聚甲基丙烯酸缩水甘油酯微球的合成与表征

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2007.01.004

Evrim Banu Altıntaş, Lokman Uzun, Adil Denizli

{"title":"Synthesis and characterization of monosize magnetic poly(glycidyl methacrylate) beads","authors":"Evrim Banu Altıntaş, Lokman Uzun, Adil Denizli","doi":"10.1016/j.cpart.2007.01.004","DOIUrl":"10.1016/j.cpart.2007.01.004","url":null,"abstract":"<div><p>Monosize, 1.6μm, magnetic beads of poly(glycidyl methacrylate) [M-poly(GMA)], were prepared by dispersion polymerization in the presence of Fe<sub>3</sub>O<sub>4</sub> nano-powder. Monosize M-poly(GMA) beads were characterized by swelling tests, density measurements, electron spin resonance (ESR), vibrating sample magnetometer (VSM) and scanning electron microscopy (SEM). The characteristic functional groups of M-poly(GMA) beads were analyzed by Fourier transform infrared spectrometer (FTIR). The M-poly(GMA) beads are highly uniform in size and have a spherical shape and non-porous structure. Polydispersity index (PDI) of M-poly(GMA) beads was calculated to be around 1.008. The hydrated density of the M-poly(GMA) beads measured at 25°C was 1.14g/cm<sup>3</sup>. The content of oxirane groups on the surface of the M-poly(GMA) sample was found to be 3.46mmol/g by using perchloric acid titration. The specific surface area of the M-poly(GMA) beads was determined to be 3.2m<sup>2</sup>/g. The equilibrium swelling ratio was 52%. The volume fraction of magnetite nanopowder in the M-poly(GMA) beads was found to be 4.5%. The g factor, that can be considered as a quantity characteristic of the molecules in which the unpaired electrons are located, was found to be 2.28 for M-poly(GMA). The external magnetic field at resonance was calculated to be 2055Gs which was found sufficient to excite all of the dipole moments present in 1.0g of M-poly(GMA) sample.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"5 1","pages":"Pages 174-179"},"PeriodicalIF":0.0,"publicationDate":"2007-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.cpart.2007.01.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74984347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Ferrofluid magnetoviscous control of wall flow channeling in porous media 多孔介质壁面流道的铁磁流体磁粘性控制

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2006.12.001

Faïçal Larachi, Damien Desvigne

引用次数: 7

Magnetically modified microbial cells: A new type of magnetic adsorbents 磁修饰微生物细胞:一种新型磁性吸附剂

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2006.12.003

Ivo Safarik, Mirka Safarikova

引用次数: 48

Magnetically rotational reactor for absorbing benzene emissions by ionic liquids 用于吸收离子液体释放苯的磁旋转反应器

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2006.12.002

Yangyang Jiang , Chen Guo , Huizhou Liu

引用次数: 33

Magnetic filtration with magnetized granular beds: Basic principles and filter performance 磁化颗粒床磁过滤:基本原理和过滤性能

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2007.01.014

Teymuraz Abbasov

{"title":"Magnetic filtration with magnetized granular beds: Basic principles and filter performance","authors":"Teymuraz Abbasov","doi":"10.1016/j.cpart.2007.01.014","DOIUrl":"10.1016/j.cpart.2007.01.014","url":null,"abstract":"<div><p>This study is devoted to the explanation of different characteristics of magnetic filtration and the way these characteristics affect the important filtration parameters. Magnetic fields in pores and the force effect of these fields on magnetic particles and the magnetization properties of packed beds composed of ferromagnetic spheres and metal chips are evaluated. The profile of accumulation and capture regions of the particles, the variation of the fluid velocity in these regions and analytic expressions of particle capture radius are presented. The effects of filtration regime parameters on magnetic filter performance were investigated. An analytical expression has been obtained for the dependence of the logarithmic efficiency coefficient on filtration velocity, the geometry of filter elements, the particle size and other parameters of filtration. The stationary and non-stationary equations of the magnetic filtration processes are given. An expression of magnetic filter performance is shown with dimensionless parameters obtained from the filtration system. These relations are useful for calculations in engineering practice, including the design of magnetic filters, provision of suggestions on construction, and optimization and control of filter operation.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"5 1","pages":"Pages 71-83"},"PeriodicalIF":0.0,"publicationDate":"2007-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.cpart.2007.01.014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81512499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 26

Audio-frequency heating of particulate magnetic systems 颗粒磁系统的音频加热

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2006.12.004

B.E. Kashevsky, I.V. Prokhorov, S.B. Kashevsky

{"title":"Audio-frequency heating of particulate magnetic systems","authors":"B.E. Kashevsky, I.V. Prokhorov, S.B. Kashevsky","doi":"10.1016/j.cpart.2006.12.004","DOIUrl":"10.1016/j.cpart.2006.12.004","url":null,"abstract":"<div><p>This paper presents theoretical and experimental studies on the magnetodynamics and energy dissipation in suspensions of small ferromagnetic particles with magnetic hysteresis and mechanical mobility in an AC magnetic field. Energy absorption by particles suspended in a solid, liquid or gas environment and subjected to high frequency magnetic fields is of great interest for cancer treatment by hyperthermia, chemical technology, biotechnology and smart materials science.</p><p>Sub-micron needle-like γ-Fe<sub>2</sub>O<sub>3</sub> particles dispersed in liquid were subjected in this study to a 430Hz magnetic field with an intensity of up to 10<sup>5</sup> Hz field exhibited heat release rates from 250 up to 600W per 1cm<sup>3</sup> of the dry particle content.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"5 1","pages":"Pages 84-92"},"PeriodicalIF":0.0,"publicationDate":"2007-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.cpart.2006.12.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76907523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

An overview of separation by magnetically stabilized beds: State-of-the-art and potential applications 磁稳定床分离综述:最新的和潜在的应用

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2007.01.010

Jordan Hristov , Ludmil Fachikov

引用次数: 49

Sedimentation acceleration of remanent iron oxide by magnetic flocculation 磁絮凝加速残余氧化铁沉降

China Particuology Pub Date : 2007-02-01 DOI: 10.1016/j.cpart.2007.01.005

Mathias Stolarski , Christian Eichholz , Benjamin Fuchs , Hermann Nirschl

{"title":"Sedimentation acceleration of remanent iron oxide by magnetic flocculation","authors":"Mathias Stolarski , Christian Eichholz , Benjamin Fuchs , Hermann Nirschl","doi":"10.1016/j.cpart.2007.01.005","DOIUrl":"10.1016/j.cpart.2007.01.005","url":null,"abstract":"<div><p>Sedimentation based processes are widely used in industry to separate particles from a liquid phase. Since the advent of the “Nanoworld” the demand for effective separation technologies has rapidly risen, calling for the development of new separation concepts, one of which lies in hybrid separation using the superposition of a magnetic field for magnetic particles. Possible product portfolio of such separation consists of pigment production, nanomagnetics production for electronics and bio separation. A promising step in that direction is magnetic field enhanced cake filtration, which has by now progressed from batch to continuous operation.</p><p>In sedimentation processes in a mass force field the settling behaviour of particles strongly depends on physico-chemical properties, concentration and size distribution of the particles. By adjusting the pH, the interparticle forces, in particular the electrostatic repulsion, can be manipulated. For remanent magnetic particles such as magnetite, pre-treatment in a magnetic field could lead to a change of interparticle interactions. By magnetizing the particles apart from van der Waals attraction and electrostatic repulsion, an additional potential is induced, the magnetic attraction, which could easily dominate the other potentials and result in agglomeration in the primary minimum. By sedimentation analysis, a wide spectrum of parameters like pH, magnetic field strength and concentration have been investigated. The results show a strong increase of sedimentation velocity by magnetic flocculation of the raw suspension. This leads to a rise in throughput due to the acceleration of sedimentation kinetics by imparting a non-chemical interaction to the physico-chemical properties in the feed stream of the separation apparatus.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"5 1","pages":"Pages 145-150"},"PeriodicalIF":0.0,"publicationDate":"2007-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.cpart.2007.01.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78254612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30