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DEHYDROGENATION AND AROMATIZATION OF METHANE IN THE ABSENCE OF OXYGEN OVER DOPED Mo/HZSM-5 CATALYSTS
作者姓名:舒玉瑛  徐奕德  崔巍  王林胜  郭燮贤
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
摘    要:研究了在Mo/HZSM-5催化剂上添加助剂以及不同的反应预处理温度对甲烷无氧脱氢芳构化反应的影响。实验结果表明,由于第二组分的添加,Mo/HZSM-5催化剂的活性和选择性都得到了较大程度的改善。预处理温度是影响催化剂反应性能的关键因素。Mo-Ru/HZSM-5催化剂经过873K空气预处理后,甲烷在973K的转化率约为10%,催化剂的稳定性也得到较大程度的提高。TPSR实验结果表明,Ru的加入降低了芳烃生成的温度。TPO和DTA实验结果表明,在Mo-Ru/HZSM-5催化剂上可生成较多的碳物种,结合反应结果,可以认为反应过程中生成的碳物种对甲烷的无氧脱氢芳构化反应是起积极作用的

关 键 词:甲烷无氧脱氢芳构化反应  修饰的Mo/HZSM-5催化剂  助剂  预处理温度  碳物种

DEHYDROGENATION AND AROMATIZATION OF METHANE IN THE ABSENCE OF OXYGEN OVER DOPED Mo/HZSM-5 CATALYSTS
Yuying Shu,Yide Xu,Wei Cui,Linsheng Wang,Xiexian Guo.DEHYDROGENATION AND AROMATIZATION OF METHANE IN THE ABSENCE OF OXYGEN OVER DOPED Mo/HZSM-5 CATALYSTS[J].Journal of Natural Gas Chemistry,1998,7(3):203-215.
Authors:Yuying Shu  Yide Xu  Wei Cui  Linsheng Wang  Xiexian Guo
Institution:State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences Dalian, Liaoning 116023
Abstract:The effects of additive and pretreatment temperature on the activity and stability of doped Mo/HZSM-5 catalysts for methane non-oxidative transformation to aromatics and C 2 hydrocarbons were investigated. The activity and selectivity of a Mo/HZSM-5 catalyst can be modified by the addition of a second metal component. The catalytic performance was very sensitive to the pretreatment temperature. A methane conversion of about 10% and a quite stable activity were obtained at the reaction temperature of 973 K over a Mo-Ru/HZSM-5 catalyst pretreated in air at a temperature of 873 K. TPSR experiments show that the addition of Ru lowered the formation temperature of aromatics. TPO and DTA experiments demonstrate that the amount of carbonaceous species over the Mo-Ru/HZSM-5 catalyst is much more than that over the Mo/HZSM-5 catalyst. The results indicate that the carbonaceous species formed during the reaction may play a positive role.
Keywords:methane  dehydrogenation and aromatization  doped Mo/HZSM-5 catalysts  additive  pretreatment temperature  carbonaceous species
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