| 李品红,朱刚利,宋焕玲,夏春谷.钾对铬催化剂脱氢环化反应的影响[J].分子催化,2013,(2):131-137 |
| 钾对铬催化剂脱氢环化反应的影响 |
| Diisobutylene Dehydrocyclization over Chromium Catalysts Modified by K |
| 投稿时间：2013-01-06 修订日期：2013-03-22 |
| DOI： |
| 中文关键词: 氧化铬 钾 对二甲苯 脱氢环化 |
| 英文关键词:chromium oxide potassium para-xylene dehydrocyclization |
| 基金项目:苏州市科技局应用基础研究计划（SYG201219） |
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| 摘要点击次数: 2020 |
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| 中文摘要: |
| 采用等体积分步浸渍法制备了不同K2O含量的K-Cr2O3/Al2O3催化剂，并用BET、XPS、 UV-Vis、H2-TPR、NH3-TPD和TG等技术对催化剂进行了表征，考察了催化剂对二异丁烯（2,4,4-三甲基戊烯）脱氢环化为对二甲苯的催化性能。结果表明，K不仅可以降低氧化铝载体的酸性，而且促进了活性组分Cr在载体表面的分散。K2O含量为1.5%时，催化剂的脱氢环化性能达到最佳。 |
| 英文摘要: |
| A series of K-Cr2O3/Al2O3 catalysts with different K2O contents for dehydrocyclization of diisobutylene (2,4,4-Trimethyl-pentene) were prepared by two-step incipient wetness impregnation. The samples were characterized by BET, XPS, UV-Vis, H2-TPR, NH3-TPD and TG methods. The dehydrocyclization reaction in the presence of K-Cr2O3/Al2O3 catalysts was studied. The results showed that the addition of K can reduce the acidity of the alumina support, and promote the dispersion of Cr on surface of catalysts. The optimal results could be obtained when 1.5% K2O was loaded. |
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