手机知网 App
24小时专家级知识服务
打 开
手机知网|搜索

CO_2重整甲烷制合成气催化剂六铝酸盐LaNi_yAl_(12-y)O_(19-δ)的研究

徐占林;毕颖丽;甄开吉

  A series of Ni modified hexaaluminates LaNiyAl12- yO19-δ (y=03, 06, 09, 10) were prepared by decomposition of nitrates and calcination at high temperature. The crystalline structure and catalytic properties for CO2 reforming of methane to synthesis gas were investigated by using XRD, XPS, TPR and TGA techniques. The results showed that a pure hexaaluminate LaNiyAl12-yO19-δphase is formed only whenyvalue is in 0<y≤1. The reduced hexaaluminates LaNiyAl12-yO19-δexhibit significant catalytic activity and stability for the reaction of CO2 reforming of methane to synthesis gas at 780 ℃, and no deactivation resulting from carbon deposition is found. In the meantime, the catalytic activity is obviously affected by the modifier Ni in the hexaaluminate lattices. Under the same reaction conditions, the conversion of CH4 and CO2 increase with increase in the amount (yvalue) of the modifier Ni.……   
[关键词]:六铝酸盐LaNi_yAl_(12-y)O_(19-δ)催化剂;甲烷;二氧化碳;重整;合成气
[文献类型]:期刊
[文献出处]: 《催化学报2000年02期
[格式]:PDF原版; EPUB自适应版(需下载客户端)