稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2015年
1期
46-55
,共10页
汪颖军%崔莹雪%所艳华%张微
汪穎軍%崔瑩雪%所豔華%張微
왕영군%최형설%소염화%장미
n-heptane%hydroisomerization%MCM-48%cerium%rare earths
By means of X-ray diffraction (XRD), N2 adsorption-desorption, Fourier transform infrared spectroscopy (FT-IR), scan-ning electron microscopy (SEM), NH3-temperature (NH3-TPD), Py-infrared (Py-IR) and thermogravimetry-differential scanning cal-orimetry (TG/DTA) techniques, the influences of Ce on the structure, acidity, stability and hydroisomerization performance of Ni-HPW/MCM-48 and Ni-HPW/Ce-MCM-48 catalysts were studied. The results showed that introduction of appropriate content of Ce into MCM-48 could improve the crystallinity, acidity and stability of mesoporous silica. The acidity and stability of the Ni-HPW/Ce-MCM-48 catalyst was also increased. Besides, the catalytic performance of the Ni-HPW/Ce-MCM-48 catalyst for n-heptane hydroisomerization was promoted. The conversion and selectivity of the Ni-HPW/Ce-MCM-48 catalyst reached 41%and 91%respectively at the preparation conditions of 4 wt.%Ni, 20 wt.%HPW, 0.03 Ce/Si molar ratio.
