| 制备条件对SO42－/ZrO2-Dy2O3-HZSM-5催化剂结构性能的影响 |
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| 引用本文： | 梁薇. 制备条件对SO42－/ZrO2-Dy2O3-HZSM-5催化剂结构性能的影响[J]. 工业催化, 2005, 13(7): 65-69 |
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| 作者姓名： | 梁薇 |
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| 作者单位： | 中国石油化工科学研究院，北京 100083 |
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| 摘 要： | 实验室制备了SO42－/ZrO2-Dy2O3-HZSM-5（SZDH）固体超强酸复合分子筛催化剂。以柠檬酸与正丁醇的酯化反应为探针，采用Hammett指示剂法、BET、XRD和SEM等多种表征技术研究了不同SO42－促进剂及其含量和焙烧温度对催化剂结构性能的影响。结果表明，以(NH4)2SO4作为SO42－促进剂、SO42－质量分数为10％、550 ℃下焙烧制得的催化剂具有较强的酸性，比表面积达344 m2·g－1，催化剂中的ZrO2主要呈四方晶相，柠檬酸转化率高达97.7％。
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| 关 键 词： | 固体超强酸催化剂 酯化反应 SO42－促进剂 焙烧温度 酸强度 比表面积 晶态 |
| 文章编号： | 1008-1143(2005)07-0065-05 |
| 修稿时间： | 2005-02-03 |
Effects of the preparation condition on the structural properties of SO42-/ZrO2-Dy2O3-HZSM-5 catalyst |
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| LIANG Wei. Effects of the preparation condition on the structural properties of SO42-/ZrO2-Dy2O3-HZSM-5 catalyst[J]. Industrial Catalysis, 2005, 13(7): 65-69 |
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| Authors: | LIANG Wei |
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| Affiliation: | Sinopec Research Institute of Petroleum Processing, Beijing 100083, China |
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| Abstract: | A SO~(2-)_4/ZrO_2-Dy_2O_3-HZSM-5 solid superacid catalyst was prepared. Effects of the kinds and content of SO~(2-)_4 promoters and calcination temperature on its structural properties were investigated by means of Hammett indicator method, BET, XRD and SEM, using esterification of citric acid with n-butanol as the probe reaction. The results showed that the catalyst modified by 10% (NH_4)_2SO_4 and calcinated at 550 has stronger acidity and a reasonably large surface area (344 m~2g~(-1)), with citric acid conversion of 97.67%. ZrO_2 in the catalyst mainly exists in tetragonal phase. |
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| Keywords: | solid superacid catalyst esterification SO~(2-)_4 promoter calcination temperature acidity surface area crystalline state |
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