With the use of silicon micromachining an inorganic membrane sieve for microfiltration is constructed, having a siliconnitride membrane layer with thickness typically 1 pm and perforations typically between 0.5 pm and 10 pm in diameter. As a support a -silicon wafer with openings of loo0 pm in diameter is used. The thin siliconnitride layer is deposited on an initial dense support by means...

The shape of pores in sedimentary rocks is dependent on the geometric structure rock matrix grains. Carbonate have more complex pore types compared to clastic due effects diagenesis and depositional environment. study analyzed deposition Kais carbonate barrier lagoon environments. It categorized into inter-particle, moldic/vuggy, micro-cracks. type a directly related its stiffness shear resista...

The objective of this research was to evaluate the effect of temperature (7, 25, and 50 degrees C) and pore size (0.1, 0.8, and 1.4 micro m) on the separation of proteins and lipids (neutral lipids and phospholipids) during microfiltration (MF) of fresh or reconstituted buttermilk. Buttermilk was subjected to MF using a pilot-scale unit mounted with ceramic membranes. The MF runs were carried o...

Microstructural phases and mechanical properties of lamellar 3D-printed cast hardened cement paste (hcp) elements were investigated using a lab-based X-ray microscope at two levels magnification (0.4× 4×). K-means clustering was used for quantitative image analysis. The entire volume intact 3-days-old hcp characterized 0.4× magnification. Three microstructural features (macro-pores, micro-chann...

We present a new model of adsorption on micro-mesoporous carbons based on the quenched solid density functional theory (QSDFT). QSDFT quantitatively accounts for the surface geometrical inhomogeneity in terms of the roughness parameter. We developed the QSDFT models for pore size distribution calculations in the range of pore widths from 0.4 to 35 nm from nitrogen at 77.4 K and argon at 87.3 K ...

Gas transport in unconventional shale strata is a multi-mechanism-coupling process that is different from the process observed in conventional reservoirs. In micro fractures which are inborn or induced by hydraulic stimulation, viscous flow dominates. And gas surface diffusion and gas desorption should be further considered in organic nano pores. Also, the Klinkenberg effect should be considere...

Reservoir rocks, regardless of what kind (oil-, gasor water-bearing), are classified by their specific properties. Most rock properties, such as storage, permeability, electric conductivity, heat capacity and so on are determined by laboratory experiments and field tests under different external conditions. Besides temperature, pressure and chemical reactions, also the geometry of the pore spac...

1. Introduction Porous solids are in the focus of scientific research due to their importance in various applications such as catalysis, mass separation, pharmaceutics, and chromatography. To date, large variety of porous materials containing both micro-and mesopores have been synthesized. Such a rapid growth of various types of porous materials consisting of several structural units with diffe...

We employ a homogenization procedure to describe the propagation of electromagnetic waves in a dielectric structure which is doubly-periodic in the X-Y plane and of arbitrary variation in the direction of propagation, Z. The fundamental cell is composed of an arbitrarily shaped pore filled with a dielectric and the host by another. Our analysis yields the structure of the electromagnetic fields...

Development of microporous materials with hierarchical structures of both micro/mesopores leads to molecular transport at nanometer length scales. For novel microporous materials including three-dimensionally ordered mesoporous imprinted (3DOm-i) zeolites and zeolite nanosheets, particle dimensions are below 35 nm resulting in surface-dominated structures. At the same time, the existence of sur...