TY - JOUR
T1 - One-step post-synthesis treatment for preparing hydrothermally stable hierarchically porous ZSM-5
AU - Ding, Jian
AU - Xue, Teng
AU - Wu, Haihong
AU - He, Mingyuan
N1 - Publisher Copyright:
© 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Hierarchically porous ZSM-5 (SiO2/Al2O3 ≈ 120) containing phosphorus was prepared by a one-step post-synthesis treatment involving controlled desilication and phosphorous modification. The hierarchically porous ZSM-5 featured high thermal and hydrothermal stability. The obtained ZSM-5 zeolites were systematically characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N2 adsorption-desorption, NH3 temperature-programmed desorption, and 27Al and 31P magic-angle spinning nuclear magnetic resonance spectroscopy. The prepared ZSM-5 displayed enhanced activity and prolonged lifetime toward hydrocarbon cracking. The high activity was attributed to improved coke tolerance owing to the presence of the highly stable mesoporous network of ZSM-5 and acid sites introduced upon phosphorus modification. Additionally a mechanism of the stabilization of the zeolites by phosphorus was proposed and discussed.
AB - Hierarchically porous ZSM-5 (SiO2/Al2O3 ≈ 120) containing phosphorus was prepared by a one-step post-synthesis treatment involving controlled desilication and phosphorous modification. The hierarchically porous ZSM-5 featured high thermal and hydrothermal stability. The obtained ZSM-5 zeolites were systematically characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N2 adsorption-desorption, NH3 temperature-programmed desorption, and 27Al and 31P magic-angle spinning nuclear magnetic resonance spectroscopy. The prepared ZSM-5 displayed enhanced activity and prolonged lifetime toward hydrocarbon cracking. The high activity was attributed to improved coke tolerance owing to the presence of the highly stable mesoporous network of ZSM-5 and acid sites introduced upon phosphorus modification. Additionally a mechanism of the stabilization of the zeolites by phosphorus was proposed and discussed.
KW - Desilication
KW - Hydrocarbon cracking
KW - Hydrothermal stability
KW - One-step modification
KW - Phosphorus stabilization
UR - https://www.scopus.com/pages/publications/85010450450
U2 - 10.1016/S1872-2067(16)62549-4
DO - 10.1016/S1872-2067(16)62549-4
M3 - 文章
AN - SCOPUS:85010450450
SN - 1872-2067
VL - 38
SP - 48
EP - 57
JO - Chinese Journal of Catalysis
JF - Chinese Journal of Catalysis
IS - 1
ER -