季生福,李树本.Na—W—Mn/SiO2催化剂表面甲烷脉冲反应I.单组分Na/、W/、Mn/SiO2催化剂[J].分子催化,2002,(3):204-208
Na—W—Mn/SiO2催化剂表面甲烷脉冲反应I.单组分Na/、W/、Mn/SiO2催化剂
  修订日期:2001-09-10
DOI:
中文关键词:  催化剂表面 担载型催化剂 甲烷 脉冲反应 晶格氧 钠 钨 锰 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
[1]中国科学院兰州化学物理研究所 [2]羰基合成与选择氧化国家重点实验室,甘肃兰州73000
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中文摘要:
      制备了单组分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,N a/SiO2表面晶格氧具有一定的C2烃选择性,并能强烈抑制CO2的生成,W/SiO2表面晶格氧对C2烃的选择性较差,但对Cox具有高的选择性;Mn/SiO2表面的晶格氧对C2H4和CO具有高选择性,而较深部位的晶格氧则对C2H6和CO2具有高的选择性。
英文摘要:
      Single Na, W, and Mn component 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/SiO 2 catalyst has a fair selectivity to C 2 hydrocarbons and a strong restraint to form CO 2. The surface lattice oxygen of the W/SiO 2 catalyst has a poor selectivity to C 2 hydrocarbons and a good selectivity to CO x. The surface lattice oxygen of the Mn/SiO 2 catalyst has good selectivities to C 2H 4 and CO and that deep underneath the surface has good selectivities to C 2H 6 and CO 2.
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