Specific surface area and pore characteristics of aluminum hydroxide prepared from high-alumina fly ash

被引：5

作者：

Zhang, Ting-An ^{[1
]}

Zheng, Chao-Zhen ^{[1
]}

Lyu, Guo-Zhi ^{[1
]}

Sun, Jun-Min ^{[2
]}

机构：

[1] Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education, Northeastern University, Shenyang

[2] High-alumina Fly Ash Resources Development and Utilization R and D Center, Datang International Power Generation Co., Ltd., Hohhot

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2014年 / 35卷 / 10期

关键词：

Aluminum hydroxide; Isothermal curve; N[!sub]2[!/sub] absorption method; Pore characteristics; Specific surface area;

D O I：

10.3969/j.issn.1005-3026.2014.10.020

中图分类号：

学科分类号：

摘要：

Using sintered high-alumina fly ash clinker as raw material, high white aluminum hydroxide was obtained after dissolution, deep desilication and decomposition (carbonation decomposition or seed precipitation) process. Low-temperature nitrogen adsorption method was adopted to analyze the specific surface area and pore distribution of aluminum hydroxide. The results showed that the aluminum hydroxide adsorption isotherm curve belongs to type III. Aluminum hydroxide pores most belong to micropores, and there still are some mesopores and macropores. The BET specific surface area and average pore diameter of carbonation aluminum hydroxide are much greater than those of seed-precipitation aluminum hydroxide. Driven by the strong action of CO2, aluminum hydroxide precipitates and condenses fiercely in carbonation decomposition, so the crystal structure of aluminum hydroxide is loose and intergranular pores are big. In seed precipitation, the growth of crystal makes the crystal coarsen, the structure is compact and intergranular pores are small.

引用

页码：1456 / 1459

页数：3

共 10 条

[1]

Ahmaruzzaman M., A review on the utilization of fly ash, Progress in Energy and Combustion Science, 36, pp. 327-363, (2010)

[2]

Cao D.Z., Selic E., Herbell J.D., Utilization of fly ash from coal-fired power plants in China, Journal of Zhejiang University: Science A, 9, 5, pp. 681-687, (2008)

[3]

Wang H., Representation granularity and specific surface area of aluminum hydroxide, China Powder Science and Technology, 5, pp. 39-41, (2004)

[4]

Wu F.-Y., Liu G.-H., Feng G.-Z., Application and production of various aluminum hydroxides, Protection and Utilization of Minerals, 71, 6, pp. 41-44, (2001)

[5]

Price R.L., Gutwein L.G., Kaledin L., Et al., Osteoblast function on nanophase alumina materials: influence of chemistry, phase, and topography, Journal of Biomedical Materials Research, 67, 4, pp. 1284-1293, (2003)

[6]

Gong W.X., Qu J.H., Liu R.P., Adsorption of fluoride onto different types of aluminas, Chemical Engineering Journal, 190, pp. 126-133, (2012)

[7]

Li W.Y., Liu J., Chen H., Application of oxalic acid cross-linking activated alumina/chitosan biocomposites in defluoridation from aqueous solution: investigation of adsorption mechanism, Chemical Engineering Journal, 225, pp. 865-872, (2013)

[8]

Kondo S., Dayu I., Ikuo A., Sorption Sciences, pp. 32-96, (2001)

[9]

Jagiello J., Thommes M., Comparison of DFT characterization methods based on N2, Ar, CO2 and H2 adsorption applied to carbons with various pore size distributions, Carbon, 42, pp. 1225-1229, (2004)

[10]

Sing K., The use of nitrogen adsorption for the char-acterization of porous materials, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 187, pp. 3-9, (2001)

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