稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
8期
709-714
,共6页
于瀛%崔梅生%李明来%赵娜%龙志奇%施用晞
于瀛%崔梅生%李明來%趙娜%龍誌奇%施用晞
우영%최매생%리명래%조나%룡지기%시용희
rare earth modification%Ni-Si catalyst%hydrogen production%methane decomposition
Different rare earth (RE=La, Ce, Pr, Nd, Sm, Y) and Cu modified nickel catalysts for hydrogen production from meth-ane decomposition were synthesized by a sol-gel process and method. The catalysts were characterized or analyzed through Brumauer-Emmett-Teller (BET), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron micros-copy (TEM) techniques. And the hydrogen production performance was also evaluated by a fixed-bed and micro-reaction tech-nique with CH4→C+H2 as a probe reaction. The results showed that rare earth modification had played a great role for nickel catalysts, for example, smaller nickel particles, good thermal stability, high activity, etc. La was the best additive among rare earth modification. The SEM of rare earth modified catalysts showed ordered flower-like structure and rare earth modification made the nickel particles move to the surface of catalysts. In addition, the SEM of nano-carbons was also changed by rare earth modification with long, narrow nano-carbon fibers or tubes obtained. Solid carbon formation was prevented by rare earth modi-fication.
