Synthesis of Mo-MCM-48 and their isomerization performances of n-heptane
- 11 Downloads
A series of Mo-MCM-48 molecular sieves were prepared by in-situ doping method and used as the catalyst for isomerization of n-heptane. The samples were characterized by X-ray powder diffraction, scanning electron microscope, transmission electron microscope, Nitrogen adsorption desorption isotherms (N2 adsorption–desorption), NH3 temperature programmed desorption (NH3-TPD), and Fourier Transform infrared spectroscopy (FT-IR). The results showed that Mo-MCM-48 samples modified by Mo species still had the typical cubic mesoporous structure of MCM-48. The results of n-heptane isomerization showed that when the doping amount of Mo species was 0.02, the reaction temperature was 250 °C, and the reaction time was 150 min, the conversion of n-heptane and the selectivity of isoheptane of Mo-MCM-48 were up to 36.71% and 52.41%, respectively. There were no obvious decline of the catalytic activity of Mo-MCM-48 after reaction for 190 min.
KeywordsMesoporous molecular sieve Mo-MCM-48 n-Heptane Isomerization
This work was supported by the Support Plan for Outstanding Scientific Research Talents of Provincial Advantageous and Characteristic Disciplines of Chemical Engineering and Technology of Northeast Petroleum University, the Cultivation Fund of Northeast Petroleum University [Grant Number 2017PYYL-03], the Daqing Science and Technology Plan Projects [Grant Number szdfy-2015-04], and the College Students’ innovative Entrepreneurial Training Plan Projects of Hei Longjiang Province [grant number 201710220030].