Porosity of Coals and Coal Products

The Use of Contrast-Matching Small-Angle Neutron-Scattering Techniques to Monitor Closed Porosity in Carbons

“…These are related to material parameters via ter and Jensen (17), is the Schulz distribution, [7] Phenolic Resin Char (PRC) Sample Burn-Offs and Single Point Nitrogen BET Surface Areas where R 0 is the mean sphere radius and b is a parameter that increases with the sharpness of the distribution, e.g., an sented analytically by incomplete gamma functions which are related to one another by simple recursion relationships, such that only one incomplete gamma function, P(b, x) by time-of-flight. The sample holders were made of Suprasil (where x Å b r/2 R 0 ), and G(b) need be evaluated for with a pathlength of 0.2 cm.…”

Anode butt cores: Physical characterization and reactivity measurements

“…11 The typical shape for most chars derived from coals of a wide range of ranks exhibits similar shapes of the burn-off versus t/ τ 0.5 . However, this normalized burn-off curve is not suffi cient to offer the characteristic shape for all types of cokes because of the complexity of the char gasifi cation reactions.…”

The Pore Structure in Processed Victorian Brown Coal

“…These length scales are of great interest to workers studying coal processes as this porosity is clearly important in determining coal products when dried, combusted, liquefied, or coked (9)(10)(11). Further this coal porosity has been linked to coal's wetting behavior, adsorption characteristics, and even bulk mechanical properties (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20). To understand these dependencies one must consider that conversion initiators and coal products must pass through the complex pore structure in order to allow the transformation of raw coal.…”