CAS OpenIR
Modeling and Selection of RF Thermal Plasma Hot-Wall Torch for Large-Scale Production of Nanopowders
Bai, Liuyang1,2; He, Jiaping2,3; Ouyang, Yuge2; Liu, Wenfu1; Liu, Huichao1; Yao, Haizi1; Li, Zengshuai1; Song, Jun1; Wang, Yinling1; Yuan, Fangli2
2019-07-01
Source PublicationMATERIALS
ISSN1996-1944
Volume12Issue:13Pages:15
AbstractFouling is a great problem that significantly affects the continuous operation for large-scale radio-frequency (RF) thermal plasma synthesizing nanopowders. In order to eliminate or weaken the phenomenon, numerical simulations based on FLUENT software were founded to investigate the effect of operation parameters, including feeding style of central gas and sheath gas, on plasma torches. It is shown that the tangential feeding style of central gas brings serious negative axial velocity regions, which always forces the synthesized nanopowders to back-mix, and further leads to the fouling of the quartz tube. Moreover, it is shown that sheath gas should be tangentially fed into the plasma reactor to further eliminate the gas stream's back-mixing. However, when this feeding style is applied, although the negative axial velocity region is decreased, the plasma gas and kinetic energy of the vapor phase near the wall of the plasma reactor are less and lower, respectively; as a result, that plasma flame is more difficult to be arced. A new plasma arcing method by way of feeding gun instead of torch wall was proposed and put in use. The fouling problem has been well solved and plasma arcing is well ensured, and as a result, the experiment on large-scale production of nanopowders can be carried out for 8 h without any interruption, and synthesized Si and Al2O3 nanopowders exhibit good dispersion and sphericity.
Keywordnumerical simulation thermal plasma hot-wall torch nanopowder synthesis
DOI10.3390/ma12132141
Language英语
WOS KeywordHEAT-TRANSFER ; CFD ; NANOPARTICLES ; REACTOR ; ALUMINA ; POWDER
Funding ProjectNational Natural Science Foundation of China[11875284] ; National Natural Science Foundation of China[11535003] ; Henan Science and Technology Development Program[192102210029] ; Construction of Master's Program on Energy and Power Engineering in Huanghuai University
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China ; Henan Science and Technology Development Program ; Construction of Master's Program on Energy and Power Engineering in Huanghuai University
WOS IDWOS:000477043900105
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/30430
Collection中国科学院过程工程研究所
Corresponding AuthorBai, Liuyang; Yuan, Fangli
Affiliation1.Huanghuai Univ, Zhumadian Acad Ind Innovat & Dev, Zhumadian 463000, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.Jiangsu Jingyuan Environm Protect Co Ltd, Nantong 226001, Peoples R China
Recommended Citation
GB/T 7714
Bai, Liuyang,He, Jiaping,Ouyang, Yuge,et al. Modeling and Selection of RF Thermal Plasma Hot-Wall Torch for Large-Scale Production of Nanopowders[J]. MATERIALS,2019,12(13):15.
APA Bai, Liuyang.,He, Jiaping.,Ouyang, Yuge.,Liu, Wenfu.,Liu, Huichao.,...&Yuan, Fangli.(2019).Modeling and Selection of RF Thermal Plasma Hot-Wall Torch for Large-Scale Production of Nanopowders.MATERIALS,12(13),15.
MLA Bai, Liuyang,et al."Modeling and Selection of RF Thermal Plasma Hot-Wall Torch for Large-Scale Production of Nanopowders".MATERIALS 12.13(2019):15.
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