Physicochemical and isomerization property of Pt/SAPO-11 catalysts promoted by rare earths

稀土学报(英文版), 2009, 27(6): 937-942. doi: 10.1016/S1002-0721(08)60366-X

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Chemistry and Chemical Engineering,Jiangsu Teachers University of Technology,Changzhou 213001,China

2.School of Chemistry and Chemical Engineering,Jiangsu Teachers University of Technology,Changzhou 213001,China

3.School of Chemistry and Chemical Engineering,Jiangsu Teachers University of Technology,Changzhou 213001,China

4.Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China

5.Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China

基金项目: Natural Scientific Foundation of Jiangsu Teachers University of Technology(KYY06029) the Foundation of Jiangsu Key Laboratory of Precious Metals Chemistry(SYGK0710)

Physicochemical and isomerization property of Pt/SAPO-11 catalysts promoted by rare earths

LIU Weiqiao ^1, , SHANG Tongming ^2, , ZHOU Quanfa ^3, , REN Jie ^4, , SUN Yuhan ^5,

1.School of Chemistry and Chemical Engineering,Jiangsu Teachers University of Technology,Changzhou 213001,China

2.School of Chemistry and Chemical Engineering,Jiangsu Teachers University of Technology,Changzhou 213001,China

3.School of Chemistry and Chemical Engineering,Jiangsu Teachers University of Technology,Changzhou 213001,China

4.Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China

5.Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China

Keywords： Pt/SAPO-11 catalyst

Monometallic catalyst Pt/SAPO-11 was prepared by impregnation method. Bimetallic catalysts LaPt/SAPO-11 or CePt/SAPO-11 was prepared by sequential impregnation method. The catalysts were characterized by X-ray diffraction (XRD), nitrogen adsorption, tem-perature-programmed desorption of ammonia (NH_3-TPD), and Fourier transform infrared spectroscopy (FT-IR) techniques. The results showed that with the addition of rare earths the BET surface areas, pore volume, the amount of Bronsted acid and the total acidity of catalysts decreased slightly. However, the additive addition could lead to an increase in the amount of Lewis acid. Meanwhile, the introduction of ad-ditive was feasible to promote the dispersity of Pt. In addition, the hydroisomerization of n-heptane over different catalysts was studied.Compared with Pt/SAPO-11, LaPt/SAPO-11 or CePt/SAPO-11 showed higher catalytic activity and yield of i-C_7 due to its higher Pt dispersion.

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Physicochemical and isomerization property of Pt/SAPO-11 catalysts promoted by rare earths

参考文献