中华医学超声杂志

应用化学 ›› 1988, Vol. 0 ›› Issue (3): 92-94.

• 研究简报 • 上一篇    下一篇

甲烷水蒸气转化镍催化剂还原性能的研究

刘光明, 邱发礼, 郭填独   

  1. 中国科学院成都有机化学研究所
  • 收稿日期:1987-02-19 修回日期:1987-12-23 出版日期:1988-06-10 发布日期:1988-06-10

STUDY ON THE REDUCIBILITY OF Ni-CATALYST FOR CH4-H2O REFORMING

Liu Guangming, Qiu Fali, Guo Shendu   

  1. Chengdu Insitute of organic Chemistry, Academia Sinica
  • Received:1987-02-19 Revised:1987-12-23 Published:1988-06-10 Online:1988-06-10

PDF

427

被引次数

2

摘要： 对用于甲烷水蒸气转化的镍催化剂还原性能的研究多结合催化剂失活原因进行.近年来,对30万吨合成氨厂造气炉催化剂的研究,发现在一段造气炉管入口端2米左右(反应温度360—550℃)的催化剂没有充分发挥作用,从而使甲烷的转化集中在2—3米的催化剂上进行,使该段催化剂负荷加重,活性和强度损失大,对反应炉管的损伤也较严重.

关键词: 甲烷水蒸气转化, 镍催化剂, 重稀土氧化物

Abstract: NiO catalysts for methane-steam reforming were investigated by temperature programmedr eduction (TPR) and X-ray diffraction techniques. The peak temperatures of reduction on the TPR curve as determined in N2-H2 (6.3% H2) were: 415℃ for NiO-A1, 430℃ for NiO-A2, 378℃ for NiO-Y2O3-A1, 372℃ for NiO-RE2O3-A1 and 478℃ for RE2O3-NiO-A1. Carrier At is found to be superior to A2. Catalysts modified by heavy rare-earth oxides have the lowest peak temperature of reduction, and hence they are more effective in the entrance region of the reforming furnace, where the reaction temperature is 360-550℃. The mechanism of addition of rare earth oxides on the behaviour of the catalysts are briefly discussed.

Key words: Methane-steam rcforming, Ni-catalysts, Rare-earth oxides

网站版权 © 应用化学     本网站备案：吉ICP备12000082号