| 甲烷无氧芳构化催化剂的活性相生成研究 |
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| 引用本文： | 马丁,苏玲玲,舒玉瑛,徐奕德,包信和.甲烷无氧芳构化催化剂的活性相生成研究[J].高等学校化学学报,2001,22(9):1535-1538. |
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| 作者姓名： | 马丁 苏玲玲 舒玉瑛 徐奕德 包信和 |
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| 作者单位： | 中国科学院大连化学物理研究所, 催化基础国家重点实验室, 大连 116023 |
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| 基金项目： | 国家重点基础研究发展规划项目 ( G19990 2 2 40 0 )资助 |
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| 摘 要： | 利用在线质谱分析检测了在各种催化剂上甲烷的程序升温表面反应(TPSR)过程中不同物种的行为.结果表明,MoO3向Mo2C的转变阻碍了甲烷的活化及其芳构化.如果这个转变过程在TPSR反应前发生,甲烷活化和苯生成的温度将大大降低(分别为760K和847K).通过比较担载在不同分子筛上钼物种的催化行为发现,甲烷的初始活化是这个反应速率的决定步骤.只有具备合适的钼价态,Bro-nsted酸性以及特殊的分子筛孔道结构的催化剂才能使甲烷芳构化反应高效进行.
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| 关 键 词： | 甲烷芳构化 诱导期 Mo2C MCM-22 ZSM-5 TPSR |
| 文章编号： | 0251-0790(2001)09-1535-04 |
| 收稿时间： | 2000-07-05 |
Formation of Active Phase of the Catalyst for the Reaction of Methane Aromatization |
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| MA Ding,SU Ling Ling,SHU Yu Ying,XU Yi De,BAO Xin He.Formation of Active Phase of the Catalyst for the Reaction of Methane Aromatization[J].Chemical Research In Chinese Universities,2001,22(9):1535-1538. |
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| Authors: | MA Ding SU Ling Ling SHU Yu Ying XU Yi De BAO Xin He |
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| Institution: | State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China |
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| Abstract: | The behavior of different species during the temperature programmed surface reaction (TPSR) of methane over various catalysts is traced by an on line mass spectrometer. It is demonstrated that the transformation of MoO 3 to molybdenum carbide hinders the activation of methane as well as the succeeding aromatization in the TPSR. If this transformation process is done before the reaction, the temperature needed for methane activation and benzene formation will be greatly lowered(760 K and 847 K, respectively). It is strongly suggested that molybdenum carbide is one of the active center of this catalytic process. |
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| Keywords: | Methane aromatization Induction period Molybdenum carbide MCM 22 ZSM 5 TPSR |
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