Apparent Dissolution Kinetics of Diatomite in Alkaline Solution

doi:10.1016/S1004-9541(13)60533-9

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (7): 736-741.DOI: 10.1016/S1004-9541(13)60533-9

• 催化、动力学与反应工程 • 上一篇下一篇

Apparent Dissolution Kinetics of Diatomite in Alkaline Solution

杜高翔¹, 吕国诚¹, 何绪文²

1 School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;
2 School of Chemical & Environmental Engineering, China University of Mining & Technology, Beijing 100083, China

收稿日期:2012-01-06 修回日期:2012-09-07 出版日期:2013-07-28 发布日期:2013-08-24
通讯作者: DU Gaoxiang
基金资助:
Supported by the National Natural Science Foundation of China (50674080).

Apparent Dissolution Kinetics of Diatomite in Alkaline Solution

DU Gaoxiang¹, LÜ Guocheng¹, HE Xuwen ²

1 School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;
2 School of Chemical & Environmental Engineering, China University of Mining & Technology, Beijing 100083, China

Received:2012-01-06 Revised:2012-09-07 Online:2013-07-28 Published:2013-08-24
Supported by:
Supported by the National Natural Science Foundation of China (50674080).

摘要/Abstract

摘要： The dissolution kinetics of diatomite in alkaline solution is the theoretical basis for the process optimization of alkali-diatomite reaction and its applications. In this study, the dissolution kinetics of diatomite in NaOH solution is investigated. The results indicate that the dissolution reaction fits well the unreacted shrinking core model for solid-liquid heterogeneous reactions. The apparent reaction order for NaOH is 2 and the apparent activation energy for the reaction (E_a) is 28.06 kJ·mol^-1. The intra-particle diffusion through the sodium silicate layer is the rate-controlling step. When the dissolution reaction occurs at the interface of unreacted diatomite solid core, the diffusion in the trans-layer (the liquid film around the wetted particle) reduces the rate of whole dissolution process.

关键词: diatomite, sodium hydroxide, dissolution kinetics

Abstract: The dissolution kinetics of diatomite in alkaline solution is the theoretical basis for the process optimization of alkali-diatomite reaction and its applications. In this study, the dissolution kinetics of diatomite in NaOH solution is investigated. The results indicate that the dissolution reaction fits well the unreacted shrinking core model for solid-liquid heterogeneous reactions. The apparent reaction order for NaOH is 2 and the apparent activation energy for the reaction (E_a) is 28.06 kJ·mol^-1. The intra-particle diffusion through the sodium silicate layer is the rate-controlling step. When the dissolution reaction occurs at the interface of unreacted diatomite solid core, the diffusion in the trans-layer (the liquid film around the wetted particle) reduces the rate of whole dissolution process.

Key words: diatomite, sodium hydroxide, dissolution kinetics

杜高翔, 吕国诚, 何绪文. Apparent Dissolution Kinetics of Diatomite in Alkaline Solution[J]. Chinese Journal of Chemical Engineering, 2013, 21(7): 736-741.

DU Gaoxiang, LÜ Guocheng, HE Xuwen . Apparent Dissolution Kinetics of Diatomite in Alkaline Solution[J]. Chin.J.Chem.Eng., 2013, 21(7): 736-741.

参考文献

1 Kazi-Zakir, H., Abdelhamid, S., “Synthesis of onion-like mesoporous silica from sodium silicate in the presence of a,ω-diamine surfactant”, Microporous and Mesoporous Materials, 114, 387-394 (2008).

2 Du, G.X., Zheng, S.L., Ding, H., “Process optimization of reaction of acid leaching residue of asbestos tailing and sodium hydroxide aqueous solution”, Science in China Series E: Technological Sciences, 52 (1), 204-209 (2009).

3 Du, G.X., “The preparation of superfine magnesium hydroxide and superfine amorphous silica from the asbestos tailing”, Ph.D. Thesis, China University of Mining and Technology (Beijing), Beijing, China (2005). (in Chinese)

4 Tang, Q., Wang, T., “Preparation of silica aerogel from rice hull ash by supercritical carbon dioxide drying”, Journal of Supercritical Fluids, 35, 91-94 (2005).

5 Zaky, R.R., Hessien, M.M., El-Midany, A.A., Khedr, M.H., Abdel-Aal, E.A., El-Barawy, K.A., “Preparation of silica nanoparticles from semi-burned rice straw ash”, Power Technology, 185, 31-35 (2008).

6 Hessien, M.M., Rashad, M.M., Zaky, R.R., Abdel-Aal, E.A., El-Barawy, K.A., “Controlling the synthesis conditions for silica nanosphere from semi-burned rice straw”, Materials Science and Engineering B, 162, 14-21 (2009).

7 Jendoubi, F., Mgaidi, A., El Maaoui, M., “Kinetics of the dissolution of silica in aqueous sodium hydroxide solutions at high pressure and temperature”, Canadian Journal of Chemical Engineering, 75 (4), 721-727 (1997).

8 Zhu, L.Y., Duan, W.H., Xu, J.M., Zhu, Y.J., “Kinetics of reactive extraction of Nd from Nd₂O₃ with TBP-HNO₃ complex in supercritical carbon dioxide”, Chin. J. Chem. Eng., 17 (2), 214-218 (2009).

9 Chi, R.A., Tian, J., Gao, H., Zhou, F., Liu, M., Wang, C.W., Wu, Y.X., “Kinetics of leaching flavonoids from Pueraria Lobata with ethanol”, Chin. J. Chem. Eng., 14 (3), 402-406 (2006).

10 Thornton, S.D., Radke, C.J., “Dissolution and condensation kinetics of silica in alkaline solution”, Society of Petroleum Engineers of AIME, 3 (2), 109-124 (1988).

11 Okunev, A.G., Shaurman, S.A., Danilyuk, A.F., Aristov, Yu.I., Bergeret, G., Renouprez, A., “Kinetics of the SiO₂ aerogel dissolution in aqueous NaOH solutions: experiment and model”, Journal of Non-Crystalline Solids, 260, 21-30 (1999).

12 Shaurman, S.A., Okunev, A.G., Danilyuk, A.F., Aristov, Yu. I., “The kinetic model of dissolution of silicon dioxide aerogels in an aqueous NaOH solution”, Colloid Journal, 62 (4), 502-508 (2000).

13 Bao, L., Zhang, T.A., Liu, Y., Dou, Z.H., Lü, G.Z., Wang, X.M., Ma, J., Jiang, X.L., “The most probable mechanism function and kinetic parameters of gibbsite dissolution in NaOH”, Chin. J. Chem. Eng., 18 (4), 630-634 (2010).

14 Huang, L. H., Chemical Mineral Processing, Metallurgical Industry Press, Beijing, 55-74 (1990). (in Chinese)

15 Hou, K.Z., Yao, X.Z., Wang, X.X., “Study on the property of sodium polysilicate as detergent builder”, Journal of Nanyang Teachers’ College (Natural Sciences Edition), 12, 44-45, 50 (2004). (in Chinese)

16 Shi, X.M., Xu, S.M., Lin, J.T., “Synthesis of SiO₂-polyacrylic acid hybrid hydrogel with high mechanical properties and salt tolerance using sodium silicate precursor through sol-gel process”, Materials Letters, 63 (1), 527-529 (2009).

17 Guo, H.X., Application of Chemical Kinetic, Chemical Industry Press, Beijing, 417-419 (2003b). (in Chinese)

18 Guo, H.X., Application of Chemical Kinetic, Chemical Industry Press, Beijing, 421-424 (2003a). (in Chinese)

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Apparent Dissolution Kinetics of Diatomite in Alkaline Solution

Apparent Dissolution Kinetics of Diatomite in Alkaline Solution

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