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nitrogen molecule in the adsorbed state is 16.2 Å 2 . Pore volumes and pore size distributions were determined by the BJH method. The beads were also examined using an atomic force microscope, AFM Nanoscope III (Digital Instruments, USA) operating

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Thermal degradation of rice husks on a pilot plant

Utilization of the products as adsorbents for oil spill cleanup

Journal of Thermal Analysis and Calorimetry
Authors: S. Genieva, S. Turmanova, A. Dimitrov, P. Petkov, and L. Vlaev

and pore size distribution curves of both samples. Fig. 4 Adsorption–desorption isotherms of BRHA and WRHA and pore size distribution curves As can be seen from Fig. 4 , the

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Journal of Thermal Analysis and Calorimetry
Authors: Edjane F. B. Silva, Marcílio P. Ribeiro, Ana C. F. Coriolano, Ana C. R. Melo, Anne G. D. Santos, Valter J. Fernandes Jr., and Antonio S. Araujo

temperature of 77 K on a Quantachrome equipment NOVA-2000 model. Prior to adsorption measurement, the sample was degassed at temperature of 300 °C for 2 h. The specific surface area was determined by the BET method and the pore size distribution was estimated

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adsorption isotherm and pore size distribution for MCM-41 The analysis by scanning electron microscopy was carried out in order to observe the morphology of the material. It can be observed in Fig. 3 that the sample of

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the sample without application in the reaction. The micropores deceased to 22 %, while the mesopores increased to 56 %. Table 2 Surface areas, pore volumes and pore size distributions of catalysts activated at

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the evaporable water. The capillary porosity and pore-size distribution were investigated by mercury intrusion porosimetry carried out with a Micromeritics Pore Sizer IV 9600 V1.05, in a pressure range of 0.5-33000 psia

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in an MCM-41 type material [ 19 ]. Figure 4 shows pore size distributions for the calcined FA-derived F-MCM-41 materials. The pore size distribution for these samples, as calculated by the BJH method, shows a sharp peak at about 2.7 nm for the F

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and 0.54 cm 3 g −1 for MgNiAl(4.05). Pore-size distribution plots (not shown) exhibited an unimodal pore distribution centered at 3.8 nm. The TPR profile of MgNiAl(4.05) is reported in Fig. 2 . It shows a sharp peak at 713 K, which merges

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–242. Brutsaert, W., 1966. Probability laws for pore size distributions. Soil Sci. 117. 311–314. Comegna, V., Damiani, P. & Somella, A., 1998. Use of a fractal model for determining soil water retention curves. Geoderma

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multimolecular layers. Journal of the American Chemical Society. 60. (2) 309–319. Brutsaert, W., 1966. Probability laws for pore size distributions. Soil Science. 101. 85–92. Calhoun, J. C., Lewis, M

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