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Kinetics Analysis on Mixing Calcination Process of Fly Ash and Ammonium Sulfate
Alternative TitleKinetics Analysis on Mixing Calcination Process of Fly Ash and Ammonium Sulfate
Wang Peng1; Li Laishi2; Wei Dezhou1
2014
Source PublicationCHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN1004-9541
Volume22Issue:9Pages:1027-1032
AbstractThe further development of the extraction of alumina that is produced in the calcination process of ammonium sulfate mixed with fly ash was limited because of the lack of systematic theoretical study. In order to aggrandize the research of the calcination process, the kinetics and reaction mechanism of the calcinations were studied. The result suggests that there are two stages in the calcination process, and the alumina extraction rate increases swiftly in the initial stage, but slows down increasing in the later stage. The apparent activation energy of the initial and later stages equals to 13.31 and 35.65 kJ.mol(-1), respectively. In the initial stage, ammonium sulfate reacts directly with mullite in the fly ash to form ammonium aluminum sulfate, while in the later stage, aluminum sulfate is formed by the reaction between ammonium aluminum sulfate and ammonium sulfate. (c) 2014 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.
Other AbstractThe further development of the extraction of alumina that is produced in the calcination process of ammonium sulfate mixed with fly ash was limited because of the lack of systematic theoretical study. In order to aggrandize the research of the calcination process, the kinetics and reaction mechanism of the calcinations were studied. The result suggests that there are two stages in the calcination process, and the alumina extraction rate increases swiftly in the initial stage, but slows down increasing in the later stage. The apparent activation energy of the initial and later stages equals to 13.31 and 35.65 kJ·mol~(-1), respectively. In the initial stage, ammonium sulfate reacts directly with mullite in the fly ash to form ammonium aluminum sulfate, while in the later stage, aluminum sulfate is formed by the reaction between ammonium aluminum sulfate and ammonium sulfate.
KeywordRESPONSE-SURFACE METHODOLOGY AQUEOUS-ELECTROLYTE SYSTEMS EXCESS GIBBS ENERGY OPTIMIZATION MODEL Mixing calcinations Kinetics Activation energy Reaction mechanism
Indexed ByCSCD
Language英语
Funding Project[National Science and Technology Project of China]
CSCD IDCSCD:5277249
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/142242
Collection中国科学院金属研究所
Affiliation1.东北大学
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
Wang Peng,Li Laishi,Wei Dezhou. Kinetics Analysis on Mixing Calcination Process of Fly Ash and Ammonium Sulfate[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2014,22(9):1027-1032.
APA Wang Peng,Li Laishi,&Wei Dezhou.(2014).Kinetics Analysis on Mixing Calcination Process of Fly Ash and Ammonium Sulfate.CHINESE JOURNAL OF CHEMICAL ENGINEERING,22(9),1027-1032.
MLA Wang Peng,et al."Kinetics Analysis on Mixing Calcination Process of Fly Ash and Ammonium Sulfate".CHINESE JOURNAL OF CHEMICAL ENGINEERING 22.9(2014):1027-1032.
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