【摘 要】
：
Monometallic catalyst Pt/SAPO-11 was prepared by impregnation method. Bimetallic catalysts LaPt/SAPO-11 or CePt/SAPO-11 was prepared by sequential impregnation
【机 构】
：
School of Chemistry and Chemical Engineering,Institute of Coal Chemistry
论文部分内容阅读
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.
其他文献
Processing maps for a medium carbon V-N microalloyed steel(designated as VN steel) and a medium carbon V-N bared steel(designated as Non-VN steel) were develope
Sn-Ni alloy films for Li-ion batteries were fabricated by electrochemical deposition with rough copper foils as current collectors.The influence of electrochemi
Y_2O_2S:Eu~(3+), Mg~(2+), Ti~(4+) nanorods were prepared by a solvothermal procedure. Rod-like Y(OH)_3 was firstly synthesized by hydro-thermal method to serve
Nitrogen-doped fluorinated diamond-like carbon (FN-DLC) films were prepared on single crystal silicon substrate by radio frequency plasma enhanced chemical vapo
A series of solid solutions Er_2W_(3-x)Mo_xO_(12) (0.5≤x≤2.5) were successfully synthesized by the solid state method.Their crystal structures and negative th
YAG:Ce phosphor was synthesized by a novel simple method, wherein the admixture of three raw materials (Y_2O_3, α-Al_2O_3 and CeO_2) were first acidified by di
Based on practical situation of rare earth industrial chain, production process and rare earth materials that could produce solid wastes on batch were discussed
La_2O_3 and Y_2O_3 co-doped Mo secondary emitters were prepared by three kinds of doping method combined with high temperature plasma sintering. The secondary e
The effect of aging on microstructure of Mg-Zn-Er alloys at 473 K was investigated using hardness measurement, scanning elec-tron microscopy (SEM) and transmiss
Tetraethylenepentamine (C_8H_(23)N_5, TEPA) has been used as a novel precipitant to synthesize yttrium aluminum garnet (Y_3Al_5O_(12),YAG) precursor from a mixe