PCS-648
Pore structure of the Argonne Premium coals
Larsen, J.W.; Hall, P.; Wernett, P.C.
Energy & Fuels
1995
9(2)
324-330
Data are presented that are inconsistent with the accepted model of coal pores existing
as an interconnected network of bottlenecked pores. It is proposed that pores in coals are
isolated and can be reached only by diffusion through the solid. The fractal dimensionality
of the pores in five Argonne Premium coals were measured by small-angle X-ray
scattering and vary between 2.35 and 2.87. The adsorption of the following gases has
been measured on all of the coals:N[sub 2], CO[sub 2], ethane, cyclopropane,
cyclobutane, cyclopentane, and cyclohexane. Except for Zap lignite, there is a very steep
dependence of BET surface area on adsorbate size which is rationalized as being due to
the size dependence of the adsorbate diffusion rates through coals. 38 refs., 15 figs., 4
tabs.
1. Upper Freeport,PA (UF)
2. Wyodak-Anderson, WY (WY)
3. Illinois #6 (IL)
4. Pittsburgh #8 (PIT)
5. Pocahontas #3 (POC)
6. Blind Canyon,UT (UT)
7. Lewiston-Stockton, WV (WV)
8. Beulah-Zap, ND (ND)