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according to the BET equation. The basicity of the samples was measured by CO 2 temperature-programmed desorption (CO 2 -TPD) on Quantachrome CHEMBET-3000. 0.200 g sample was pre-treated at 550 °C for 1 h in dry He flow (50 ml/min), and cooled

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aromatization of the intermediates [ 2 ]. A lot of work on NH 3 -TPD, XPS, FTIR, ESR, NMR and EXAFS [ 15 – 19 ] done by several groups showed that impregnated Mo species are mainly located on the external zeolite surface. After calcination, part of Mo species

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-programmed desorption of ammonia (NH 3 –TPD) experiments. About 100 mg of sample was used in each measurement. The samples were pretreated at 500 °C for 1 h under argon stream (20 mL min −1 ). After that, the sample was cooled down to 100 °C, and pulse NH 3 (99

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FID detector. Catalyst characterization The surface area and acidity characteristics of H-beta were obtained, respectively, by N 2 adsorption and temperature programmed desorption (TPD) of NH 3 . The catalyst

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The catalyst alkalinity was measured on a quartz microreactor (TP-5080, Tianjin-Xianquan, China) through a temperature-programmed desorption of carbon dioxide (CO 2 -TPD) experiment. About 50 mg of sample was used in each measurement. The samples were

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CO 2 conversion with time on stream. The promotional effect of CeO 2 –ZrO 2 was verified by measuring the changes of nickel crystallite size, reducibility and the extent of CO 2 activation with the help of TPR, H 2 -chemisorption, CO 2 -TPD and XRD

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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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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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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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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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