Influences of cerium on structure and catalytic performance of n-heptane hydroisomerization of Ni-HPW/MCM-48

By means of X-ray diffraction（XRD）, N2 adsorption-desorption, Fourier transform infrared spectroscopy（FT-IR）, scanning electron microscopy（SEM）, NH3-temperature（NH3-TPD）, Py-infrared（Py-IR） and thermogravimetry-differential scanning calorimetry（TG/DTA） techniques, the influences of Ce on the structu...

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Published inJournal of rare earths Vol. 33; no. 1; pp. 46 - 55
Main Author 汪颖军 崔莹雪 所艳华 张微
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2015
Subjects
Calorimetry
Catalysis
Catalysts
cerium
Diffraction
HPW
hydroisomerization
MCM-48
n-heptane
Nickel
Rare earth metals
rare earths
Scanning electron microscopy
Stability
傅立叶变换红外光谱
催化剂性能
加氢异构化
扫描电子显微镜
正庚烷
结构
MCM-48
cerium
hydroisomerization
n-heptane
rare earths
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Summary:By means of X-ray diffraction（XRD）, N2 adsorption-desorption, Fourier transform infrared spectroscopy（FT-IR）, scanning electron microscopy（SEM）, NH3-temperature（NH3-TPD）, Py-infrared（Py-IR） and thermogravimetry-differential scanning calorimetry（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.
Bibliography:11-2788/TF
n-heptane; hydroisomerization; MCM-48; cerium; rare earths
By means of X-ray diffraction（XRD）, N2 adsorption-desorption, Fourier transform infrared spectroscopy（FT-IR）, scanning electron microscopy（SEM）, NH3-temperature（NH3-TPD）, Py-infrared（Py-IR） and thermogravimetry-differential scanning calorimetry（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.
WANG Yingjun, CUI Yingxue, SUO Yanhua, ZHANG Wei （College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China）
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(14)60382-3