Activity of titania and zeolite samples dosed with triethylamine
Certain properties of titania and the ammonium- and proton-form of Y zeolites (silica/alumina ratio of 5.2) were explored before and after treatment by triethylamine (TEA). The effect of the triethylamine upon the physical and chemical properties of both titania and the zeolite were characterized by physical and chemical adsorption methods. BET surface area data showed enhanced surface area of the TEA-treated nanotitania over the untreated nanotitania whereas the TEA-treated zeolite showed a considerable decrease in surface area compared to the untreated zeolite. TPD of the TEA-treated Y zeolite showed that weakly adsorbed TEA left the surface between 150 and 300 oC; strongly adsorbed TEA decomposed to ethylene and ammonia at higher temperatures. XPS, IR, and Raman spectroscopies, powder XRD, and 27Al MAS-NMR spectroscopy were used to further characterize the changes introduced by in-situ nitridation. Pre-adsorbed triethylamine decorated acid sites so as to neutralize these sites for the reaction of methanol to dimethylether. Carbon monoxide and ormaldehyde, products of the methanol probe reaction, were observed-- suggesting that basic sites are present in this treated zeolite and titania.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1255359
- Report Number(s):
- PNNL-SA-105966; 47841; KC0302010
- Journal Information:
- Microporous and Mesoporous Materials, Journal Name: Microporous and Mesoporous Materials Vol. 220; ISSN 1387-1811
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photocatalytic degradation of triethylamine on titanium oxide thin films
Selective catalytic reduction of nitric oxide over vanadia/titania catalysts: Temperature-programmed desorption and isotopically labeled oxygen-exchange studies