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adsorbed phase is taken into consideration [ 5 ]. The desorption isotherm used in determination of the pore size distribution (PSD) is affected by the pore network: when pressure is reduced, liquid will evaporate from large open pores, but pores of the same

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Suitable container design permits very high temperature and differential temperature resolution in DSC even when relatively large (− 0.14 cm3) samples are used; and thus energy signals associated with phase change occurring over large temperature intervals may be analysed in differential elements.

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Thermoporosimetry

Pore size distribution measurements for microporous glass using differential scanning calorimetry

Journal of Thermal Analysis and Calorimetry
Authors: K. Ishikiriyama, M. Todoki, K. H. Min, S. Yonemori, and M. Noshiro

The pore size distributions (PSDs) of microporous glass, which were controlled by acid leaching subsequent to phase separation of CaO-Al2O3-B2O3-SiO2 glass, were determined via both mercury porosimetry and thermoporosimetry (thermal porosimetry). As a result, the pore radii, the cumulative pore volumes, and the surface areas determined via thermoporosimetry were in good agreement with those determined via mercury porosimetry. It was revealed that thermoporosimetry could be applied to pore structure analysis for porous materials having pore sizes at least up to 58 nm in radius.

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injection pressure for pore size in the range between 0.004 and 10 μm. Pore size distribution from mercury intrusion data was calculated by Washburn Eq. 1 , assuming a contact angle of 141.3° and a Hg surface tension of 480 dyn/cm. (1) where r is the

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surface area, micropore volume and pore size distribution of samples were calculated from the nitrogen adsorption isotherms by applying the Brunauer–Emmett–Teller (BET), Dubinin–Radushkevich (DR) and Horvath-Kawazoe (HK) models, respectively

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conductivity as related to pore size distribution in unsaturated soils . Soil Sci. 174 . ( 9 ) 508 – 515 . Amyx , J. W. , Bass , D. M. & Whitting , R

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roughness), the composition (type of binder and granulometry of aggregate) the physical properties the thermal characteristics and the pore size distribution [ 14 ]. Materials and Methods Two natural pozzolans available at the

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Abstract  

Peculiarities of carbonization of two styrene/divinylbenzene precursors (one sulfonated, another aminated and phosphorylated) have been investigated by thermogravimetry and differential thermal analysis. It was shown that phosphorus compounds incorporate into carbon structure and cause delayed carbonization. Porous structure and surface properties of synthetic carbons have been investigated by standard (BET, αs method, DA) and advanced (AED, PSD, regularization) methods from benzene and water adsorption isotherms. It was shown that phosphorus-containing carbon is less microporous and shows highly hydrophilic surface.

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Abstract  

Properties of limestone related to SO2/SO3 reactivity were investigated. Limestone calcined under different conditions (temperature, time and with/without additives) yield calcines of distinctly different physical structures. The amount of pores and the size of the pores formed during calcination is important. The main purpose of the present work was to gain a better understanding and more reliable explanation of the temperature regime for gas desulphurization using Ca-based sorbents in atmospheric fluidized-bed combustors. Pore size, surface area and pore volume of each calcine were determined by mercury porosimetry and BET methods. At higher calcination temperature and during longer time, sintering became significant and the obtained calcine had a smaller internal surface area and thereby the average pore radius increased. The additives such as NaCl also accelerated sintering thus increasing the pore size. The measurements of porosity were supplemented by scanning electron microscopic observations employed for qualitative description of the pore structure. SEM micrographs are presented.

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hydraulic conductivity as related to pore size distribution in unsaturated soils . Soil Sci . 174 . ( 9 ) 508 – 515 . Amyx , J. W. , Bass , D. M

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