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Catalytic Oxidative Dehydrogenation of n ‐Butane on Gallium Nitride‐Containing Titanosilicate Catalyst
Author(s) -
Xing Tian,
Lang Yang,
Chen JianGang,
Luo QunXing,
Liu Chang,
Song Jian,
Liu ZhongWen,
Liu ZhaoTie
Publication year - 2019
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.23585
Subject(s) - catalysis , butane , dehydrogenation , materials science , x ray photoelectron spectroscopy , particle size , wurtzite crystal structure , fourier transform infrared spectroscopy , adsorption , chemical engineering , inorganic chemistry , chemistry , organic chemistry , zinc , engineering , metallurgy
GaN‐containing titanosilicate catalysts were used for the first time for the oxidative dehydrogenation (ODH) of n ‐butane at a relatively low reaction temperature (460 °C). Commercially available GaN powder with a wurtzite crystal structure showed superior reactivity and stability for the ODH of n ‐butane. The catalytic property of GaN catalyst for ODH strongly depends on the GaN particle size. The effects of the GaN weight percentage and GaN particle size on the catalytic performance are investigated in a fixed bed reactor. Based on the physicochemical properties of the catalyst characterized via TEM, DLS, N 2 adsorption‐desorption, XRF, O 2 ‐TPD, XRD, XPS, and in‐situ FTIR, the textural and structural properties of catalyst were obtained. The catalytic results reveal that the presence of GaN increases the activity of the catalysts, indicating that GaN can be used as a new active phase for the ODH of n ‐butane. XRD, XPS, O 2 ‐TPD, DLS, TEM, and in‐situ FTIR results show that activated O species exist on the surface of the GaN catalyst and enhance the catalytic performance with a decreasing GaN particle size, suggesting that smaller GaN particles possess a remarkable capability to activate O species in O 2 and C‐H bonds in light alkanes.