NDLI: A highly efficient Ga/ZSM-5 catalyst prepared by formic acid impregnation and <i>in situ</i> treatment for propane aromatization

Content Provider	Royal Society of Chemistry (RSC)
Author	Tan, Yisheng Zhang, Junfeng Xie, Hongjuan Han, Yizhuo Wang, Xiaoxing Zhang, Qingde Xiao, He
Copyright Year	2015
Abstract	A simple method for the preparation of a Ga/ZSM-5 catalyst for propane aromatization was established by formic acid impregnation and in situ treatment. The catalyst prepared by this novel method showed remarkably superior activity of propane aromatization. Under the conditions T = 540 °C, P = 100 kPa, WHSV = 6000 ml g−1·h−1 and with a N2/C3H8 molar ratio of 2, the highest propane conversion and selectivity to BTX (benzene, toluene and xylene) achieved on H–Ga/SNSA catalyst was 53.6% and 58.0%, respectively, much higher than that of the catalyst prepared using the traditional impregnation method (38.8% and 48.2%). The catalysts were characterized by nitrogen physical adsorption, ICP-AES, DRIFT, py-FTIR, NH3-TPD, H2-TPR, XPS and 27Al MAS NMR techniques. The characterization data indicated that this facile methodology enhanced the dispersion of the Ga species and promoted the formation of highly dispersed (GaO)+ species, which could exchange with the acidic protons (Brønsted acid sites) of the zeolite framework, contributing to the strong Lewis acidity. The super catalytic behavior was attributed to the synergistic effect between the strong Lewis acid sites generated by the (GaO)+ species and the Brønsted acid sites.
Starting Page	4081
Ending Page	4090
Page Count	10
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	5
Issue Number	8
Journal	Catalysis Science & Technology
DOI	10.1039/c5cy00665a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Gallium Acid Magic angle spinning Toluene ZSM-5 Inductively coupled plasma atomic emission spectroscopy Concentration Zeolite Nitrogen Pascal (unit) London dispersion force Ammonia Adsorption Lewis Aromatase Benzene Bildschirmtext Xylene Nuclear magnetic resonance Propane
Content Type	Text
Resource Type	Article
Subject	Catalysis

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