NDLI: Performance of Pt/MgAPO-11 Catalysts in the Hydroisomerization of n-dodecane

Content Provider	Springer Nature Link
Author	Yang, Xiaomei Xu, Zhusheng Tian, Zhijian Ma, Huaijun Xu, Yunpeng Qu, Wei Lin, Liwu
Copyright Year	2006
Abstract	MgAPO-11 molecular sieves with varying Mg contents synthesized by the hydrothermal method were used as supports for bifunctional Pt/MgAPO-11 catalysts. MgAPO-11 molecular sieves and the corresponding catalysts were characterized by X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), temperature-programmed desorption of NH3 (NH3-TPD), differential thermogravimetric (DTG) analysis, temperature-programmed reduction of H2 (H2-TPR), H2 chemisorption and catalytic reaction evaluation. The results indicated that the acidity generated via the substitution of Mg2+ for Al3+ in the framework increased with the Mg content. Acting as acidic components, the MgAPO-11 molecular sieves loaded with Pt were tested in the hydroisomerization of n-dodecane. Optimum isomer yield was obtained over the Pt/MgAPO-11 catalyst that had neither the highest acidity nor the highest Pt loading among the tested catalysts. In fact, the activity and the isomer yield both could attain a maximum on 0.5 wt.% Pt/MgAPO-11 catalysts with differing Mg contents. A lower Mg content resulted in an insufficient acidity, whilst a higher Mg content weakened the dehydrogenation/hydrogenation function of the Pt. These inappropriate balances between the acidic and the metallic functions of the catalysts would lead to low activities and isomer yields. On the other hand, the 0.5 wt.% Pt/MgAPO-11(3) catalyst was found to have a good balance between the acidic and the metallic functions, and thus exhibited both high activity and isomer yield in comparison with the conventional 0.5 wt.% Pt/SAPO-11 catalyst.
Starting Page	139
Ending Page	145
Page Count	7
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	109
Issue Number	3-4
e-ISSN	1572879X
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2006-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydroisomerization n-dodecane MgAPO-11 AEL molecular sieves Physical Chemistry Industrial Chemistry/Chemical Engineering Pharmacy Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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