| 郭锡坤,林维明.镝对固体超强酸催化剂ZrO2-Dy2O3/SO42--HZSM-5的酸性和稳定性的影响[J].分子催化,2000,(4):275-280 |
| 镝对固体超强酸催化剂ZrO2-Dy2O3/SO42--HZSM-5的酸性和稳定性的影响 |
| Effect of Dysprosium on Acidity and Stability of Solid Superacid ZrO2-Dy2O3/SO42--HZSM-5 Catalyst |
| 修订日期：2000-02-29 |
| DOI： |
| 中文关键词: 固体超强酸 催化剂 酸强度 稳定性 镝 |
| 英文关键词:Solid superacid,Catalyst,Acid strenght,Stability |
| 基金项目:国家"211"工程建设项目，， |
| 郭锡坤 林维明 |
| [1]汕头大学化学系 [2]华南理工大学化工系 |
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| 中文摘要: |
| 合成了固体超强酸催化剂ＺｒＯ２－Ｄｙ２Ｏ３／ＳＯ４＾２－，并将其负载于分子筛ＨＺＳＭ－５上，制成复合型固体超强酸催化剂ＺｒＯ２－Ｄｙ２Ｏ３／ＳＯ４＾２－ＨＺＳＭ－５）以下简称催化剂ＺＤＳＨ），采用Ｈａｍｍｅｔｔ批示剂法，吸附吡淀的ＴＰＤ法，考察催化剂ＺＤＳＨ的酸强度及其分布；通过热重分析（ＴＧＡ）、差热分析（ＤＴＡ）方法，考察镝对催化剂ＺＤＳＨ稳定性的作用；运用红外光谱（ＩＲ）法，分析催化剂ＺＤＳ |
| 英文摘要: |
| A new complex solid superacid ZrO 2 Dy 2O 3/SO 4 2- HZSM 5(ZDSH) catalyst was prepared by preparing solid superacid ZrO 2 Dy 2O 3/SO 4 2- and loading it on HZSM 5 zeolite. The surface acid strength and its distribution were characterized by Hammett indicator and Py TPD. The effects of Dy on stability were investigated using TGA and DTA, and the structure of SO 4 2- on the catalyst surface was studied using IR. The results show that ZDSH catalyst increases the conversion of citric acid in esterification with n butanol to 97.67%, which only decreases by 4.41% after 5 runs. Since Dy can not only adjust the acid strength distribution, but also decrease the carbon deposition of the catalyst and restrain the loss of SO 4 2- by forming mosaic structure, the stability of the catalyst can be improved effectively. |
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