| 王俊丰.Ce-SBA-15的制备及其苯酚甲醇烷基化性能[J].分子催化,2016,30(6):523-531 |
| Ce-SBA-15的制备及其苯酚甲醇烷基化性能 |
| Preparation of Ce-SBA-15 Catalyst and its Performance on Phenol Alkylation with Methanol |
| 投稿时间：2016-11-17 修订日期：2016-12-14 |
| DOI： |
| 中文关键词: 浸渍法 Ce-SBA-15 烷基化 邻甲酚 |
| 英文关键词:impregnation method Ce-SBA-15 alkylation o-cresol |
| 基金项目: |
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| 摘要点击次数: 1823 |
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| 中文摘要: |
| 采用后合成法制备Ce-SBA-15介孔分子筛。通过XRD、N2吸附-脱附、SEM、EDS、NH3-TPD、Py-FTIR和TG-DTA手段对样品进行表征。结果表明，Ce-SBA-15催化剂具有介孔结构，活性组分CeO2能够很好地分散在载体表面。在固定床反应装置上，考察了Ce负载量、焙烧温度和焙烧时间对Ce-SBA-15催化苯酚甲醇烷基化性能的影响。最佳组成和制备条件为：Ce负载量为15%，焙烧温度为550 ℃，焙烧时间为4.5 h。在苯酚/甲醇摩尔比1/4，反应温度460℃，质量空速3.0h-1，常压的条件下，Ce-SBA-15分子筛催化苯酚甲醇烷基化性能最好，苯酚转化率达到66.89%，邻甲酚选择性达到55.43%。 |
| 英文摘要: |
| Ce-SBA-15 catalysts were prepared through impregnation method with different content of Ce. The samples were characterized by XRD, nitrogen adsorption-desorption isotherms, SEM, EDS, NH3-TPD, Py-FTIR and TG-DTA methods. The results showed that Ce-SBA-15 still maintained a highly ordered mesoporous structure of SBA-15. The activity parts of CeO2 had a highly dispersion on the surface of SBA-15. The catalytic activity of the modified zeolite in the alkylation of phenol with methanol was evaluated. The influences of Ce content, catalyst calcination temperature, and calcination time on the alkylation were studied. The optimal composition and preparation conditions were obtained: Ce content was 15% in weight, catalyst calcination temperature was 550 ℃, and calcination time was 4.5 h. When reaction temperature was 460℃, n(Phenol)/n(Methanol) was 1/4, MHSV was 3.0h-1,Ce-SBA-15 zeolite showed the best performance of alkylation. The conversion of phenol is 66.89% and selectivity to o-cresol is 55.43%. |
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