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Reaction Kinetics, Mechanisms and Catalysis
Authors: Kenichiro Inoue, Kiyomi Okabe, Megumu Inaba, Isao Takahara, and Kazuhisa Murata

, Cu K α radiation, 40 kV, 150 mA). The patterns were recorded over the 2 θ angle ranging from 5° to 30° at a scan rate of 8° min −1 . The surface acidity of catalysts were measured by the temperature programmed desorption (TPD) of NH 3 (BEL-CAT, BEL

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recorded from a Micromeritics ASAP2010 analyzer. Scanning electron microscopy (SEM) was used to illustrate the morphology of the catalysts on a HITACHI S-4800 instrument. Temperature-programmed desorption of ammonia (NH 3 -TPD) was conducted using a JAPAN

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with phenol [ 25 ]. In the present work, Ti–Si mixed oxides are synthesized by the sol–gel method, characterized by N 2 adsorption–desorption, X-ray diffraction (XRD), NH 3 -temperature programmed desorption (NH 3 –TPD), Fourier transform infrared

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acidity values. Fig. 4 gives a comparison of the percentage conversion and selectivity towards dealkylation and dehydrogenation with the acidity data. The total acidity of the catalysts as determined by the temperature programmed desorption (TPD) of

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Reaction Kinetics, Mechanisms and Catalysis
Authors: Cleanio L. Lima, Hélvio S. A. de Sousa, Santiago J. S. Vasconcelos, Josué M. Filho, Alcemira C. Oliveira, Francisco F. de Sousa, and Alcineia C. Oliveira

temperature programmed desorption of Pyridine (Py-TPD). 50 mg of each catalyst was pretreated at 150 °C under nitrogen flow for 1 h. Then Py was pulsed into the reactor at 250 °C under He flow until the acid sites were saturated. Finally, the physisorbed Py

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to TMS. Temperature-programmed-desorption (TPD) profiles of ammonia from the platinum catalysts were examined using a homemade TPD apparatus. A 0.1 g platinum catalyst was charged in a quartz tube with an O.D. = 1/4′ and then activated in an

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, B , Szombathely , MV , Hoffmann , J , Brauer , P . 1995 Characterization of the acidic properties of zeolites by means of temperature-programmed desorption (TPD) of ammonia. Calculation of distribution function of the desorption energy . J

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Journal of Thermal Analysis and Calorimetry
Authors: A. V. Ursu, G. Jinescu, F. Gros, I. D. Nistor, N. D. Miron, G. Lisa, M. Silion, G. Djelveh, and A. Azzouz

and CO 2 -TPD measurements . Thermochim Acta . 2006 ; 449 : 27 – 34 . 10.1016/j.tca.2006.07.019 . 9. Azzouz , A , Ursu , A-V , Nistor , D , Sajin , T , Assaad , E , Roy , R

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-IR, TG/DTA, ICP-AES, NH 3 -TPD and N 2 gas adsorption methods were used for the characterization of the zeolite samples. In order to determine the chemical composition of fresh and reused catalysts, zeolite samples were analyzed by ICP-AES (Perkin

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evidenced by O 2 -TPD. On the contrary, O 2 desorption from deactivated Cu/ZSM-5 (after reaction at 250 °C) occurred at around 330 °C according to O 2 -TPD results, and stable N 2 O decomposition activity could take place only above 350 °C. This is the

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