Filtration media are required to have suitable pore size, pore size distribution, pore volume, pore surface area and permeability for performing satisfactorily in applications. It is difficult to encounter all the desired properties in a filtration medium. In this investigation, we have characterized filtration media by flow porometry, used these pre-characterized filtration media to design com...

Low field NMR T2 distribution is an efficient tool for characterizing pore size distribution in porous media. For multimodal systems, a new technique called T2-storeT2 allows the analysis of diffusional pore to pore exchange that is extremely useful for the characterization of connectivity. This technique uses 2D inverse Laplace techniques and produces T2-T2 maps. Qualitatively, a system is cou...

The pore radius distribution in paper is known to be influenced by changes in the mean grammage and formation. Experimental data are presented that confirm the established result that the standard deviation of pore radii is proportional to the mean. The data show also that this proportionality is the same for changes in grammage and formation and that, contrary to results reported in the litera...

Positronium annihilation lifetime spectroscopy is used to determine the pore-size distribution in low-dielectric thin films of mesoporous methylsilsesquioxane. A physical model of positronium trapping and annihilating in isolated pores is presented. The systematic dependence of the deduced pore-size distribution on pore shape/dimensionality and sample temperature is predicted using a simple qua...

This paper studies parameters which affect the pore size diameter of a silicon membrane. Electrochemical etching is performed in characterise the parameter involved in this process. The parameter has been studied is volume ratio of hydrofluoric acid (HF) and ethanol as an electrolyte aqueous for electrochemical etch. This electrolyte aqueous solution has been mixed between HF and ethanol with v...

Phase behavior in shale remains a mystery because of various complexities and effects. One complexity is from nanopores, in which phase behavior is significantly affected by the interaction between the pore surfaces and fluid molecules. The result is the heterogeneous distribution of molecules that cannot be described by bulk-phase thermodynamic approaches. Statistical thermodynamic methods can...

The remaining oil distribution and displacement mechanism of poly/surface dual flooding stage in medium high permeability reservoir are not clear. In this paper, the conditions Gangxi Area 3 Dagang Oilfield were taken as research object. Based on nuclear magnetic resonance large model physical simulation experiment, characterization micro macro residual start-up enhanced recovery experiment car...

Abstract The pore-structure characteristics of hybrid basalt–polypropylene fibre-reinforced concrete were investigated by using mercury intrusion porosimetry. applicability various fractal models in characterising the HBPRC pore structure was compared. results show that types and content fibres different influences on cumulative volume basalt-polypropylene concrete. Compared with pore-volume so...

This study investigates the impact of ice-templating conditions on the morphological features of composite polysaccharide aerogels in relation to their mechanical behavior and aims to get a better insight into the parameters governing these properties. We have prepared polysaccharide aerogels of guar galactomannan (GM) and tamarind seed xyloglucan (XG) by enzymatic oxidation with galactose oxid...

Soil structure is developed across a wide range of scales including pores of different origin and herewith different size and shape. At larger scales soil structure is expressed in a heterogeneous distribution of local bulk densities. X-ray tomography is a suitable tool to measure and visualize this hierarchical structure at various scales and resolutions. However, because of the wide range of ...