Kinetics Analysis on Mixing Calcination Process of Fly Ash and Ammonium Sulfate

IMR OpenIR

	Kinetics Analysis on Mixing Calcination Process of Fly Ash and Ammonium Sulfate
其他题名	Kinetics Analysis on Mixing Calcination Process of Fly Ash and Ammonium Sulfate
	Wang Peng 1; Li Laishi 2; Wei Dezhou 1
	2014
发表期刊	CHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN	1004-9541
卷号	22 期号:9 页码:1027-1032
摘要	The 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.
其他摘要	The 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.
关键词	RESPONSE-SURFACE METHODOLOGY AQUEOUS-ELECTROLYTE SYSTEMS EXCESS GIBBS ENERGY OPTIMIZATION MODEL Mixing calcinations Kinetics Activation energy Reaction mechanism
收录类别	CSCD
语种	英语
资助项目	[National Science and Technology Project of China]
CSCD记录号	CSCD:5277249
引用统计	被引频次：7[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/142242
专题	中国科学院金属研究所
作者单位	1.东北大学 2.中国科学院金属研究所
推荐引用方式 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.