| 固体超强酸WO3/ZrO2-SiO2的制备及其催化性能研究 |
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| 引用本文： | 尹建军,曾书韦,谢小红.固体超强酸WO3/ZrO2-SiO2的制备及其催化性能研究[J].兰州理工大学学报,2007,33(5):67-72. |
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| 作者姓名： | 尹建军 曾书韦 谢小红 |
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| 作者单位： | 兰州理工大学,石油化工学院,甘肃,兰州,730050 |
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| 基金项目： | 甘肃省教育厅科研项目
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石油大学(北京)中国石油天然气集团公司催化重点实验室开放基金 |
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| 摘 要： | 用溶胶凝胶法制备一种新的复合氧化物固体超强酸催化剂WO3/ZrO2-SiO2,以乙酸与乙醇反应的酯化率为评价指标,考察W/Zr物质的量比、焙烧温度和焙烧时间等因素对其催化性能的影响,得到最佳的制备工艺;用流动指示剂法测定催化剂的酸强度,用XRD、BET、TEM、DSC-TG等方法对催化剂进行表征,所制备的催化剂呈比较规则的多孔网状结构,具有超强酸性,催化性能良好,主要以无定型形态存在,比表面积达649.1 m2/g.
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| 关 键 词： | 固体超强酸 复合氧化物 溶胶凝胶法 酯化反应 |
| 文章编号： | 1673-5196（2007）05-0067-06 |
| 修稿时间： | 2007-01-21 |
Preparation of solid superacid WO3/ZrO2-SiO2 and study of its catalytic property |
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| YIN Jian-jun,ZENG Shu-wei,XIE Xiao-hong.Preparation of solid superacid WO3/ZrO2-SiO2 and study of its catalytic property[J].Journal of Lanzhou University of Technology,2007,33(5):67-72. |
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| Authors: | YIN Jian-jun ZENG Shu-wei XIE Xiao-hong |
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| Affiliation: | College of Petrochemical Technology, Lanzhou Univ. of Tech. , Lanzhou 730050, China |
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| Abstract: | A novel complex oxides solid superacid catalyst WO3/ZrO2-SiO2 was prepared by sol-gel method,and taking the esterification of the reaction between acetic acid and ethanol as an evaluating indicator,the influence of preparation conditions of the catalyst such as molar ratio of W/Zr,calcinations temperature,calcinations time etc on its catalytic property were studied,so that an optimum synthetic processing was obtained.The catalyst WO3/ZrO2-SiO2 was characterized by means of XRD,BET,TEM,DSC-TG and the flowing Hammett indicator method was used to test the acidity of the catalyst.The results show that the prepared catalyst WO3/ZrO2-SiO2 exhibits rather regular porous reticular structure,possess,super strong acidity and good catalytic property.It exists mainly in the form of noncrystalling state,its specific surface area amountes to 649.1 m2/g. |
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| Keywords: | solid super-acid complex oxides sol-gel processing esterification |
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