developed useful carbon molecular sieves based on carbonized vinylidene chloride copolymer with micropores
having an average micropore
size 3.0 to 5.0 Angstroms.
UNIVERSITY PARK, Pa., December 20, 2018 -- Micropores
in fabricated tissues such as bone and cartilage allow nutrient and oxygen diffusion into the core, and this novel approach may eventually allow lab -grown tissue to contain blood vessels, according to a team of Penn State researchers.
Usually mesopore corresponding to intergranular pores are dominant, while the heavily cemented sandstones show large amounts of intercrystalline micropores
. Thus the evaluation of the complex and heterogeneous beach-bar sandstone reservoir requires a comprehensive study program.
According to the pore classification method used in mercury intrusion porosimetry (MIP), pores are divided into macropores (d > 1 [micro]m), meso-pores (0.1 [micro]m < d [less than or equal to] 1 [micro]m), tiny pores (0.015 [micro]m < d [less than or equal to] 0.1 [micro]m) and micropores
(d [less than or equal to] 0.015 [micro]m).
Finally, the micropores
are not affected by loading or compaction processes (Figures 4 and 5).
It can be seen that the surface of the MAO layer is uneven, and many micropores
with various pore sizes distributing uniformly on the surface can be observed.
In the second time-span of 10 F-T cycles, left peaks of four pictures in Figure 6 gain a considerable growth while the right peaks basically remain the same, which means micropores
increased rapidly while macropores had no evident change during this period.
In terms of the C[O.sub.2] capture by activated carbons, it has been reported that the narrow micropores
play a decisive role in C[O.sub.2] adsorption capacity [20-23].
On one hand, micropores
(pore size <2.0 nm) provide effective sites for ion adsorption-desorption, and mesopores (2.0 nm < pore size < 50 nm) play a dominant role in ion transportation .
A number of studies concluded that micropores
and transitional pores are the primary space for CBM storage, whereas meso- and macropores are responsible for CBM migration [1, 25-31].
The dual layer technology is a good way to avoid the accumulated particle inside the micropores
. However, the influence of micropore
structure on deep bed filtration stage has not yet been reported, which is the first motivation of our study presented in this paper.