季生福,李树本,许传芝,薛锦珍.Na-W-Mn/SiO2催化剂表面甲烷脉冲反应Ⅱ. 多组分Na、 W、 Mn/SiO2催化剂[J].分子催化,2002,(4):267-272
Na-W-Mn/SiO2催化剂表面甲烷脉冲反应Ⅱ. 多组分Na、 W、 Mn/SiO2催化剂
Methane Pulse Reaction over Na-W-Mn/SiO2 Catalysts Ⅱ. Multicomponent Na, W, and Mn SiO2-Supported Catalysts
  修订日期:2001-09-10
DOI:
中文关键词:  甲烷 脉冲反应 担载型催化剂 晶格氧 钠 钨 锰 表面反应 二氧化硅
英文关键词:Supported catalyst,Surface,Methane,Pulse reaction,Lattice oxygen
基金项目:国家重点基础研究发展计划(973计划),G1999022406,
季生福  李树本  许传芝  薛锦珍
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
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中文摘要:
      制备了多组分Na,W,Mn/SiO2催化剂,在ITD(Ion Trap Detector)装置上进行了催化剂表面晶格氧脱附前后的甲烷恒温脉冲反应(CH4-CTPR)。研究结果表明,Na-W/SiO2催化剂表面晶格氧,具有较高的CH4转化率和C2烃选择性,并对C2H6的生成起着重要的作用,Na-Mn/SiO2催化剂表面晶格氧,也具有较高的CH4转化率和C2烃选择性,但对C2H6的形成有一定的诱导期;W-Mn/SiO2催化剂表面晶格氧,对CH4的转化和CO2的生成具有很高初活性,但对C2烃的选择性较低;Na-W-Mn/SiO2催化剂表面晶格氧,具有很高的CH4转化率和C2烃定向选择性,这是由于Na,W,Mn各组分协同作用的结果。
英文摘要:
      Multicomponent Na, W, and Mn SiO 2 Supported catalysts were prepared and their CH 4 constant temperature pulse reaction (CH 4 CTPR) were investigated on an Ion Trap Detector (ITD) apparatus. The experimental results indicate that the surface lattice oxygen of the Na W/SiO 2 catalyst has high CH 4 conversion and selectivity to C 2 hydrocarbons and an important effect to form C 2H 6. The surface lattice oxygen of the Na Mn/SiO 2 catalyst has high CH 4 conversion and selectivity to C 2 hydrocarbons and a time delay to form C 2H 6. The surface lattice oxygen of the W Mn/SiO 2 catalyst has high initial CH 4 conversion and selectivity to CO 2, but has a poor selectivity to C 2 hydrocarbons. The surface lattice oxygen of the Na W Mn/SiO 2 catalyst has very high CH 4 conversion and selectivity to C 2 hydrocarbons. There is a synergic effect of the Na, W, and Mn components to form the surface lattice oxygen in the Na W Mn/SiO 2 catalyst.
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