کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1272549 | 1497596 | 2010 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Partial oxidation of methane over Ni/Mg/Al/La mixed oxides prepared from layered double hydrotalcites Partial oxidation of methane over Ni/Mg/Al/La mixed oxides prepared from layered double hydrotalcites](/preview/png/1272549.png)
A series of Ni/Mg/Al/La mixed oxides prepared by thermal decomposition of layered double hydrotalcites (HT) were characterized by XRD, ICP, EXAFS, TGA, TPR-H2, SEM, and N2 adsorption/desorption technique. The results revealed the formation of periclase-type catalysts with mesoporous structure, and the addition of La3+ lowered the phase crystallization with the formation of small oxide particles. Such catalysts had both high activities and stabilities toward partial oxidation of methane (POM). The catalyst containing 6.5 mol.% La3+ showed the highest performance at 1053 K with CH4 conversion of 99%, CO selectivity of 93% and H2 selectivity of 96%, which could be attributed to the presence of highly dispersed nickel and then the resistance to coke formation due to the promotion effect of lanthanum.
Journal: International Journal of Hydrogen Energy - Volume 35, Issue 21, November 2010, Pages 11776–11786