The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH

›› 2010, Vol. 18 ›› Issue (4): 630-634.

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The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH

BAO Li, ZHANG Ting'an, LIU Yan, DOU Zhihe, L麲uozhi, WANG Xiaomin, MA Jia, JIANG Xiaoli

Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education, School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

Received:2009-09-02 Revised:2010-07-05 Online:2010-08-28 Published:2010-08-28

The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH

鲍丽, 张廷安, 刘燕, 豆志河, 吕国志, 王晓民, 马佳, 蒋孝丽

Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education, School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

通讯作者: ZHANG Ting'an, E-mail:zta2000@163.net
基金资助:
Supported by the Research Fund for the Doctoral Program of Higher Education(20050145029);the Science and Technology Talents Fund for Excellent Youth of Liaoning Province(2005221012)

Abstract

Abstract: Determination of probable mechanism function and kinetic parameters is important to hydrometallurgical kinetics.In this work,the most probable mechanism function and kinetic parameters of gibbsite dissolution in NaOH solution are studied.The sample,the mixture of synthetic gibbsite and sodium hydroxide solution,was scanned in high-pressure differential scanning calorimetry (DSC) equipment with the heating rate of 10 K·min^-1. Integral equation and differential equation of non-isothermal kinetics were solved to fit the data related to DSC curve.According to the calculation results,the most probable mechanism function for pure synthetic gibbsite dissolution in sodium hydroxide solution is presented based on the optimum procedure in the database of the mechanism function.The apparent activation energy obtained is (75±1) kJ·mol^-1,the frequency factor is 10^8±;1mol·s^-1,and the reaction is a second order reaction.

Key words: gibbsite, kinetic parameter, mechanism function, integral equation, differential equation

摘要： Determination of probable mechanism function and kinetic parameters is important to hydrometallurgical kinetics.In this work,the most probable mechanism function and kinetic parameters of gibbsite dissolution in NaOH solution are studied.The sample,the mixture of synthetic gibbsite and sodium hydroxide solution,was scanned in high-pressure differential scanning calorimetry (DSC) equipment with the heating rate of 10 K·min^-1. Integral equation and differential equation of non-isothermal kinetics were solved to fit the data related to DSC curve.According to the calculation results,the most probable mechanism function for pure synthetic gibbsite dissolution in sodium hydroxide solution is presented based on the optimum procedure in the database of the mechanism function.The apparent activation energy obtained is (75±1) kJ·mol^-1,the frequency factor is 10^8±;1mol·s^-1,and the reaction is a second order reaction.

关键词: gibbsite, kinetic parameter, mechanism function, integral equation, differential equation

BAO Li, ZHANG Ting'an, LIU Yan, DOU Zhihe, L麲uozhi, WANG Xiaomin, MA Jia, JIANG Xiaoli. The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH[J]. , 2010, 18(4): 630-634.

鲍丽, 张廷安, 刘燕, 豆志河, 吕国志, 王晓民, 马佳, 蒋孝丽. The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH[J]. , 2010, 18(4): 630-634.

References

1 Pereira,J. A. M.,Schwaab,M.,Dell,O. E.,Pinto,J. C.,Monteiro, J. L. F.,Henriques,C. A.,“The kinetics of gibbsite dissolution in NaOH”,Hydrometallurgy,96(1/2),6-13(2009).
2 Liu,J.,Wu,R.Q.,Li,J. Y.,“A study on digestion kinetics of bauxite”, J. CSIMM,4(16),1-10(1985).(in Chinese)
3 Gu,S. Q.,Cao,R.J.,Chen,X. M.,“Study on digestion kinetics of diasporic bauxite”,Acta Metallurgical Sinica,23(6),B269-B276 (1987).(in Chinese)
4 Maltz,N. S.,Sizyakov,V. M.,Shmorgunenko,N.S,In:Light Metals, Adkins,E.M.,ed.,Metallurgical Society of AIME,Warrendale, Pennsylvania,99(1983).
5 Addai-Mensah,J.,Dawe,J.,Ralston,J.,“The dissolution and interactions of gibbsite particles in alkaline media”,In:Oral Session, Proceedings of the XXI International Mineral Processing Congress, Developments in Mineral Processing,13,C6-1-C6-7(2000).
6 Gu,S. Q.,Cao,R.J.,Chen,X.M.,“Steady state mathematical model of diasporic bauxite digestion”,Nonferrous Metals,38(2),66-73 (1986).(in Chinese)
7 Qi,L.K.,“Dissolution kinetics of silicon and aluminium minerals in gibbsite”,Light Metals,8,3-6(1996).
8 Bomtrager,A.,Knirsch,D.,Fetting,F.,“Rate of dissolution of hydrargillite-containing and boehmite-containing bauxites in caustic soda”,Chem.Ing.Tech.,46(15),659-665(1974).
9 Li,C. Q.,Zhang,P.M.,Chen,Q. Y.,“Investigation of digestion process kinetics of gibbsite”,Nonferrous Metals,43(4),52-55(1991). (in Chinese)
10 Yin,A. J.,Chen,Q.Y.,Zhang,P. M.,“Studies on the kinetics of digestion process of synthetic gibbsite by DSC”,Chemical Journal of Chinese Universities,12(11),1507-1509 (1991).(in Chinese)
11 Yang,C.Y.,Science of Alumina Production,Metallurgical Industry Press,Beijing(1982).(in Chinese)
12 Bi,S.W.,Yu,H.Y.,Alumina Technology,Chemical Industry Press, Beijing(2006).(in Chinese)
13 Liu,Z.H.,Introduction of Thermal Analysis,Chemical Industry Press,Beijing,China(1991).(in Chinese)
14 Hu,R. Z.,Yang,Z. Q.,Ling,Y.J.,“The determination of the most probable mechanism function and three kinetic parameters of exothermic decomposition reaction of energetic materials by a single non-isothermal DSC curve”,Thermochim.Acta,123,135-151 (1988).(in Chinese)
15 Yang,Z.Q.,Hu,R.Z.,Liang,Y.J.,“The determination of most probable mechanism function and kinetic parameters of thermal decomposition of 2,6-dinitrophernci by a single non-isothermal DSC curve”, Acta Physico-Chimica Sinica,2(1),13-21(1986).(in Chinese)
16 Hu,R. Z.,Gao,S. L.,Zhang,H. F.,Thermal Analysis Kinetics,Science Press,Beijing(2008).(in Chinese)
17 Liu,W.G.,MATLAB Programming and Application,High Education Press,Beijing(2006).(in Chinese)
18 Tang,A.D.,Huang,K.L.,Peng,H.,Zhang,H.P.,“Study of thermal decomposition kinetics of ammonium nitrate cerium based on Matlab”,Chinese Journal of Rare Metals,28(6),1024-1028(2004).(in Chinese)
19 Zhao,X. Z.,Principle of Chemical Dynamics,High Education Press, Beijing(1990).(in Chinese)
20 Moore,J.W.,Pearson,R.G.,Kinetics and Mechanism,John Wiley& Sons,Inc.,New York,USA(1981).
21 Wang,M.D.,Zhao X.,Physical Chemistry,Chemical Industry Press, Beijing(2008).(in Chinese)

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The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH

The Most Probable Mechanism Function and Kinetic Parameters of Gibbsite Dissolution in NaOH

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