六铝酸盐CaNiAl_(11)O_(19-δ)的合成及催化性能  

Synthesis and Catalytic Properties of Hexaaluminate CaNiAl_(11 )O_(19-δ)

作　　者：徐占林[1] 刘延[1] 崔湘浩[1] 毕颖丽[1] 甄开吉[1] 

机构地区：[1]吉林大学化学系催化研究室,长春130023

出　　处：《吉林大学自然科学学报》2000年第1期87-90,共4页Acta Scientiarum Naturalium Universitatis Jilinensis

基　　金：国家自然科学基金!(批准号 :2 9973 0 12 )

摘　　要：通过高温焙烧硝酸盐分解法 ,以 Ni为活性组分制备磁铅石型六铝酸盐复合氧化物Ca Ni Al11O19-δ催化剂 ,并用 XRD,XPS,TPR和 TGA等对催化剂的结构和性质进行考察 .结果表明 ,六铝酸盐 Ca Ni Al11O19-δ对二氧化碳重整甲烷制合成气反应具有较高的催化活性和稳定性 ,在 780℃连续反应 1 8h,CH4 和 CO2 转化率分别保持在 93.4%和 91 .2 %以上 ,催化剂积炭量仅为 1 .61 8% 。Magnetoplumbite type hexaaluminate oxide CaNiAl 11 O 19- δ was prepared by the decomposition of nitrates and calcination at a high temperature, in which Ni was used as active component The structure and the properties of the catalyst CaNiAl 11 O 19- δ were characterized with XRD, XPS, TPR and TGA techniques The hexaaluminate CaNiAl 11 O 19- δ exhibited significant catalytic activity and stability for the reaction of CO 2 reforming methane producing synthesis gas at 780 ℃ for 18 h. The conversions of CH 4 and CO 2 were kept over 93 4% and 91 2%, respectively. The amount of carbon deposited was only 1 618% and no deactivation due to carbon deposition and Ni sintering were found at high temperatures.

关 键 词：六铝酸盐 催化剂 甲烷 合成气 合成 催化性能 

分 类 号：O643.36[理学—物理化学] TE665.3[理学—化学]