Authors:Dorota Majda, Wacław Makowski, and Maria Mańko
adsorbed phase is taken into consideration [ 5 ]. The desorption isotherm used in determination of the poresizedistribution (PSD) is affected by the pore network: when pressure is reduced, liquid will evaporate from large open pores, but pores of the same
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.
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.
Authors:E. Kamseu, B. Ceron, H. Tobias, E. Leonelli, M. C. Bignozzi, A. Muscio, and A. Libbra
injection pressure for pore size in the range between 0.004 and 10 μm. Poresizedistribution 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.
where r is the
Authors:Wan-Cheng Tan, Radzali Othman, Akihiko Matsumoto, and Fei-Yee Yeoh
surface area, micropore volume and poresizedistribution 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
roughness), the composition (type of binder and granulometry of aggregate) the physical properties the thermal characteristics and the poresizedistribution [ 14 ].
Materials and Methods
Two natural pozzolans available at the
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.
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
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.