Authors:Ioan Balint, Akane Miyazaki, Dana Gingasu, and Florica Papa
peak assignment software using Cu K α radiation (λ = 1.54 Å). All the diffraction patterns were recorded in 2θ range of 20–80° by a scanning rate of 2° min −1 .
Temperature programmed desorption (TPD) experiments on 0.1 g of catalyst were
composition of the PM samples were analyzed by so-called temperature-programmed desorption followed by oxidation (TPD/O) experiments. During such experiments the samples were heated first under inert conditions (here: nitrogen atmosphere) to 700 °C with 20 K
Sol-gel-derived titania films were analyzed by temperature programmed desorption (TPD) and X-ray diffraction (XRD) techniques.
The relationship between the TPD curves measured for two types of titania gel films and their crystal structures was investigated.
On the basis of the analyses, a preparation process for a titania sol solution containing anatase nanocrystals was designed
and developed. Using this process, a colloidal anatase titania sol solution was prepared by heating aqueous titanium hydroxide
containing HCl at 60�C for 2 h. The nanocrystal structure of the titania films obtained by coating the sol on glass substrates
was confirmed by TPD and XRD measurements.
electron microscopy (SEM), X-ray powder diffraction (XRD), temperature program reduction (TPR), and temperature program desorption (TPD) techniques and catalytic measurements have been operated to determine their properties and catalytic performances
The interactions of propylene with zinc oxide have been studied by temperature-programmed desorption (TPD) under experimental conditions free of inter- or intraparticle limitations or readsorption phenomena.
Authors:Lin Sun, Xiangsheng Wang, Jichun Li, An Ma, and Hongchen Guo
obtained by NH 3 -TPD on a Quantachrome Chembet 3000 chemisorb apparatus. In the first heating before NH 3 -TPD analyses, heating was carried out in He. The samples were first heated at 873 K for 1 h and then cooled to 423 K. Then NH 3 adsorption was
Authors:D. Nistor, N. Miron, G. Surpateanu, and A. Azzouz
The present work tries to emphasize the effect of acid/basis properties of montmorillonite type clays by ion exchange with
cations of different natures. The acidity and basicity measuring was made by thermo programated desorption (TPD)1,2, using
ammonia like basis agent and carbon dioxide like acid agent. With TPD method we can determine acid/basis proprietes by measuring
of the quantity of the ammonia and carbon dioxide termodesorbed. Clays are crystalline aluminosilicates, similar with the
zeolyts, who presents the property of ion exchanging. That propriety can be applicated for pollutants cations from aquatic
solutions. Ion exchanging propriety depends of a lot of factors: the cation nature, the valence and the ionic ray of the cation
present in the impregnated solution. That's an advantage for depollution process of heavy metals by fixing of these metals
by montmorillonite structure. By using TPD metod we can obtaine a caracteristic diagram.
desorption coupled with mass spectrometer as a detector (TPD), IR and 13C
NMR measurements are used to study the adsorption of n-hexane
on hydrated HZSM-5 and NH4ZSM-5 zeolites. The 13C
NMR measurements show that n-hexane can
access the pore structure of ZSM-5 zeolites previously saturated with water.
TPD spectra of n-hexane are monitored in
the temperature region 50–300C, in the case of fully or partially
hydrated samples; two-stage desorption of n-hexane
is found. Simultaneous desorption of water and n-hexane
in the same temperature region are found, in all investigated samples.
Authors:Ling Tao, Gui-Sheng Li, Shuang-Feng Yin, Qiang Ou-Yang, Sheng-Lian Luo, Xiao-Ping Zhou, and Chak-Tong Au
samples were characterized by XRD, SEM, and NH 3 -TPD with the aim to reveal the relationship between the structure and catalytic efficiency of H-ZSM-5 zeolites.
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