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| 钾对铬催化剂脱氢环化反应的影响 | |
| 引用本文： | 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,2013,27(2):131-137. |
| 作者姓名： | 李品红 朱刚利 宋焕玲 夏春谷 |
| 作者单位： | 1. 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000;中国科学院大学,北京10049 2. 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州730000;中国科学院苏州纳米技术与纳米仿生研究所,江苏苏州215123 3. 中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃兰州,730000 |
| 基金项目： | 苏州市科技局应用基础研究计划（SYG201219） |
| 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. |
| 关 键 词： | 氧化铬 钾 对二甲苯 脱氢环化 |
| 收稿时间： | 1/6/2013 12:00:00 AM |
| 修稿时间： | 2013/3/22 0:00:00 |
Diisobutylene Dehydrocyclization over Chromium Catalysts Modified by K |
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| LI Pin-hong,ZHU Gang-li,SONG Huan-ling,XIA Chun-gu.Diisobutylene Dehydrocyclization over Chromium Catalysts Modified by K[J].Journal of Molecular Catalysis (China),2013,27(2):131-137. | |
| Authors: | LI Pin-hong ZHU Gang-li SONG Huan-ling XIA Chun-gu |
| Institution: | Lanzhou Institute of Chemical Physics,Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences,Lanzhou Institute of Chemical Physics,Lanzhou Institute of Chemical Physics |
| Abstract: | 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. |
| Keywords: | chromium oxide potassium para-xylene dehydrocyclization |
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