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Synthesis of TPA impregnated SBA-15 catalysts and their performance in polyethylene degradation reaction
Date
2012-08-01
Author
Aydemir, Bugce
Sezgi, Naime Aslı
Doğu, Timur
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Tungstophosphoric acid (TPA)-containing mesoporous santa barbara amorphous (SBA)-15 materials were synthesized by impregnation of TPA into hydrothermally synthesized SBA-15. TPA was incorporated to the porous framework of silica with different W/Si ratios, using TPA hydrate as the acid source. The synthesized materials had a surface area range of 212-825 m2 g-1, depending on the TPA loading and exhibited Type IV adsorptiondesorption isotherms. Energy dispersive spectrometry and X-ray photoelectron spectroscopy (XPS) analyses showed that TPA was successfully penetrated into mesopores of the SBA-15 material. Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analysis of the pyridine adsorbed synthesized materials revealed the existence of Lewis and Bronsted acid sites in the synthesized materials. Their performances were tested in the degradation of polyethylene by thermogravimetric analysis. An increase in TPA content significantly lowered the degradation temperature and activation energy of the polyethylene degradation reaction. In the presence of TPA-incorporated SBA-15 catalyst, activation energy was reduced to approximately half-value of the value found in the absence of the catalyst. (C) 2011 American Institute of Chemical Engineers AIChE J, 58: 24662472, 2012
Subject Keywords
Polyethylene
,
Degradation
,
Tungstophosphoric acid
,
Impregnation
,
Mesoporous material
,
Catalyst
,
SBA-15
URI
https://hdl.handle.net/11511/31788
Journal
AICHE JOURNAL
DOI
https://doi.org/10.1002/aic.12763
Collections
Graduate School of Natural and Applied Sciences, Article