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Preparation of fibrous γ-alumina with large pore volume via co-current dropwise addition method

WAN Yanchun1 WANG Yujun1 LUO Guangsheng1

(1.State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, China 100084)

【Abstract】A co-current dropwise addition method was employed to prepare γ-alumina with a large pore volume with sodium aluminate (NaAlO2) and aluminum sulfate [Al2(SO4)3] used as starting materials. The effects of the reaction pH during the precipitation process, starting material concentration, aging pH and adding surfactant sodium dodecylbenzenesulfonate (SDBS) were investigated. It was found that the starting material concentration could affect the nucleation-growth process and result in different morphologies, such as irregular sheets, fibers or granules, in which fibers could form the largest pore volume. When the NaAlO2 concentration was 0.5–0.75 mol/L, the reaction pH was controlled at 8–9.5 and the aging pH was controlled at about 9, the obtained γ-alumina was fibrous. Besides, adding SDBS during the aging process could further improve the pore volume and pore diameter distribution. The method successfully prepared fibrous γ-alumina with a pore volume of 1.35–2.19 mL/g, a specific surface area of 300–500 m2/g and an average pore diameter of 14–21 nm, a fiber length of 50–60 nm and diameter about 5 nm. It can provide a good catalyst carrier for the residue hydrogenation process.

【Keywords】 NaAlO2-Al2(SO4)3; precipitation method; γ-alumina; co-current dropwise addition; nucleation–growth; surfactant;


【Funds】 National Natural Science Foundation of China (21276140, 21036002) National Basic Research Development Programs of China (2013CB733600)

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    [1] LI HY, ZHANG TS, YANG N. The preparation and application of nanometer-Al2O3 [J]. Journal of Tianjin University of Light Industry, 2003, 18 (4): 34–37 (in Chinese).

    [2] ZHOU KG, LI YP, LI JC, et al. Preparation of fibrous nano-alumina by direct precipitation [J]. Journal of Hunan University (Natural Sciences), 2009, 36 (8): 59–63 (in Chinese).

    [3] ZOU S, YANG Q, ZENG S, et al. The form of sulfate in pseudoboehmite and its effect on properties of pseudoboehmite [J]. China Petroleum Processing & Petrochemical Technology, 2014, 16 (4): 1–6.

    [4] CHEN W, YIN ZL, CHEN W, et al. Studying on alumina of catalyst substrate in automobile exhaust cleaning [J]. New Technology & New Process, 2006, (2): 98–99. (in Chinese).

    [5] WANG DC, LIU JD. Study on the hydrodemetallization catalyst using alumina support with build-up framework pore structure [J]. Petroleum Processing and Petrochemicals, 2010, 41 (1): 31–35 (in Chinese).

    [6] WANG C. The research on preparation method and loading catalytic performance of pyrolysis gasoline hydrogenation catalyst alumina supporter [D]. Lanzhou: Lanzhou University of Technology, 2015 (in Chinese).

    [7] ZENG SQ, YANG QH, XIAO CW, et al. Effect of drying and aging conditions on the properties of pseudoboehmite [J]. Petroleum Processing and Petrochemicals, 2012, 43 (6): 53–57 (in Chinese).

    [8] ZHANG LF, SHI Y, ZHAO BY, et al. Progress in research on γ-alumina catalyst carrier [J]. Materials Review, 2007, 21 (2): 67–71 (in Chinese).

    [9] TONG J, LYU ZH, ZHANG XH. Study on synthesis of alumina with large pore volume and pore diameter [J]. Contemporary Chemical Industry, 2016, 45 (6): 1104–1107 (in Chinese).

    [10] RAO SM, ZHU JJ, DU HR. Application and preparation of activated alumina with large pore volume [J]. Light Metals, 2002, (3): 17–18 (in Chinese).

    [11] DU M, SUN ZX. Recent development in the preparation of nano alumina [J]. Inorganic Chemicals Industry, 2005, 37 (12): 9–11 (in Chinese).

    [12] THIRUCHITRAMBALAM M, PALKAR VR, GOPINATHAN V. Hydrolysis of aluminium metal and sol-gel processing of nano alumina [J]. Materials Letters, 2004, 58 (24): 3063–3066.

    [13] DU SG, LIU Y. Preparation of seed crystals for superfine aluminum hydroxide powders by carbonization process [J]. China Powder Science and Technology, 2011, 17 (4): 80–82 (in Chinese).

    [14] WANG Y. Preparation of pseudoboehmite from sodium aluminate solution [J]. Light Metals, 2010, (4): 19–20 (in Chinese).

    [15] YOLDAS BE. Transparent porous alumina [J]. American Ceramic Society Bulletin, 1975, 54 (3): 286–288.

    [16] KOBAYASHI Y, ISHIZAKA T, KUROKAWA Y. Preparation of alumina films by the sol-gel method [J]. Journal of Materials Science, 2005, 40 (2): 263–283.

    [17] ZHOU F, ZHANG Y, FAN H F. Researches on the preparation of pseudoboemite with sodium aluminate–carbon dioxide process [J]. World Nonferrous Metals, 2008, (5): 31–33 (in Chinese).

    [18] CAO XZ, JIA CB. Discussion on the factors to impact dispersion index of pseudoboehmite [J]. Energy Saving of Non-Ferrous Metallurgy, 2008, 24 (3): 30–33 (in Chinese).

    [19] SHANG LD, WANG HH. Production and modification of activated alumina [J]. Inorganic Chemicals Industry, 2012, 44 (1): 1–6 (in Chinese).

    [20] WANG YJ, XU DQ, SUN HT, et al. Preparation of pseudoboehmite with a large pore volume and a large pore diameter by using a membrane dispersion microstructured reactor through the reaction of CO2 and a NaAlO2 solution [J]. Industrial & Engineering Chemistry Research, 2011, 50 (7): 3889–3894.

    [21] SUN Y, YE Y, JIN J. Preparation of nano-sized alumina with low cost by precipitation method [J]. Materials Review, 2007, 21 (S1): 150–152 (in Chinese).

    [22] MENG WS. Study on preparation of nano-Al2O3 powder by precipitation methods [D]. Wuhan: Wuhan University of Science and Technology, 2004 (in Chinese).

    [23] YANG YY, JIANG SA, LI JJ, et al. Influence of pH on crystal form of aluminum hydroxide [J]. Inorganic Chemicals Industry, 2017, 49 (11): 41–43 (in Chinese).

    [24] LIPPENS BC. Structure and texture of aluminas [D]. USA: Waltman, 1961.

    [25] PENG L, XU X, LV Z, et al. Thermal and morphological study of Al2O3 nanofibers derived from boehmite precursor [J]. Journal of Thermal Analysis and Calorimetry, 2012, 110 (2): 749–754.

    [26] LI SW, XU JH, LUO GS. The effect of oversaturation and mixing properties on crystal morphology [C]//2006 Annual Conference of Chinese Society of Particuology cum Symposium on Particle Technology across Taiwan Straits. Beijing: Chinese Society of Particuology, 2006: 173–177 (in Chinese).

    [27] MANTZARIS NV. Liquid-phase synthesis of nanoparticles: particle size distribution dynamics and control [J]. Chemical Engineering Science, 2005, 60 (17): 4749–4770.

    [28] JUDAT B, RACINA A, KIND M. Macro- and micromixing in a TaylorCouette reactor with axial flow and their influence on the precipitation of barium sulfate [J]. Chemical Engineering & Technology, 2004, 27 (3): 287–292.

    [29] LU SY, HE YQ. Application of surfactant to synthesis of nano alumina [J]. Materials Review, 2006, 20 (S1): 149–152 (in Chinese).

    [30] SUN XJ. Study on the application of surfactants in preparation and dispersion of ultra-fine alumina [J]. Powder Metallurgy Technology, 2015, 33 (4): 254–258 (in Chinese).

    [31] CAI WQ, LI HQ, ZHANG Y. Preparation of boehmites with novel morphologies via surfactants assisted hydrothermal synthesis [J]. Materials Science and Technology, 2008, 16 (2): 207–210 (in Chinese).

This Article


CN: 11-1946/TQ

Vol 69, No. 11, Pages 4840-4847

November 2018


Article Outline


  • Introduction
  • 1 Experimental materials and methods
  • 2 Experimental results and discussion
  • 3 Conclusions
  • Symbol description
  • References