Influence of preparation methods on the physical and chemical properties of silicon-containing γ-Al2O3 support

doi:10.16085/j.issn.1000-6613.2017-0858

Abstract

Abstract: The silicon-containing alumina support has been widely used in the field of hydrogenation catalysts because it possess the mutual advantage of SiO₂ and Al₂O₃.In other words,it exhibits better structural properties,mechanical properties and suitable surface acidity.In this paper,the preparation of silicon-containing γ-Al₂O₃ catalyst support were introduced in detail,including sol-gel method,NaAlO₂-Al₂(SO₄)₃ method,kneading method,impregnation and chemical vapor deposition.The effect of preparation method on the pore structure and acidity are discussed.γ-Al₂O₃ catalyst support synthesized by sol-gel method has high chemical purity and exhibits excellent physicochemical properties.The influence mechanism of physicochemical properties of silicon-containing alumina synthesized by different methods is analyzed.It is conducive to turn the pore structure by instructing silicon into alumina in bulk,whereas silicon exposure to the sub-surface or surface facilitates turning the acidity of support.The problems in the current research and the development trend of silicon-containing alumina are proposed.

Key words: silicon-containing γ-Al₂O₃, support, preparation, pore structure, acidity

摘要： 含硅氧化铝载体因其兼具SiO₂和Al₂O₃的共同优势，即具有较好的结构性能、力学性能和一定的表面酸性，在加氢催化剂领域得到广泛应用。本文详细介绍了含硅氧化铝催化剂载体的制备方法，包括溶胶-凝胶法、NaAlO₂-Al₂（SO₄）₃法、混合法、浸渍法及化学气相沉积法。对比了制备方法对载体物化性质的影响，其中采用溶胶-凝胶法制备的载体纯度高，物化性质较好。分析了不同制备方法导致含硅氧化铝载体物化性质存在差别的作用机制。在体相中引入硅有利于调变载体孔结构，反之硅暴露于亚表面或表面有利于调变载体酸性。并指出了当前研究中存在的问题及含硅氧化铝的发展方向。

关键词: 含硅氧化铝, 载体, 制备方法, 孔结构, 酸性

CLC Number:

TQ133

WANG Minduo, ZENG Shuangqin, JIA Yanzi, YANG Qinghe. Influence of preparation methods on the physical and chemical properties of silicon-containing γ-Al₂O₃ support[J]. Chemical Industry and Engineering Progress, 2017, 36(S1): 235-240.

王敏朵, 曾双亲, 贾燕子, 杨清河. 制备方法对含硅氧化铝载体性质的影响[J]. 化工进展, 2017, 36(S1): 235-240.

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Influence of preparation methods on the physical and chemical properties of silicon-containing γ-Al₂O₃ support

制备方法对含硅氧化铝载体性质的影响

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