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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

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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

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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

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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

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Abstract  

Results are presented on the low-temperature interaction of ammonia with AlPO-5, the TPD of the adsorbed ammonia and the high-temperature interaction of ammonia with the AlPO-5 framework.

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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. Experimental Chemicals and reagents The

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chromatograph with a thermal conductivity detector. Ammonia temperature-programmed desorption (NH 3 -TPD) was conducted on a home-made apparatus. 50 mg of catalyst was loaded in a quartz tubular reactor (i.d. = 6 mm) prior to the measurement, and was

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reaction. These materials were characterized by N 2 adsorption measurements, X-ray diffraction (XRD), MET, temperature-programmed desorption (TPD) of pyridine and 71 Ga MAS-NMR spectroscopy. Experimental Catalysts

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Abstract  

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.

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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.

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