Coal resources of Central America

Desulfurization of coal by oxidation in alkaline solution

“…Therefore, in this system, iron pyrite can be regarded as solid B and dissolved oxygen as reactant A in Equation 48. For all the runs, a plot of p(Xg) versus t gave the best subjective fit to a straight line indicating that diffusion of the dissolved oxygen through the ash layer controls the rate of reaction.…”

“…Geological Survey, and various state geological surveys, coal is the most abundant energy resource in this country (5,42,48,58). Coal, which accounts for 88% of proven national reserves of energy, is now being used to provide only 19% of domestic energy requirements.…”

Geology of Ledges State Park, Boone, Iowa

“…The two most important of these are known as the upper and lower coals (Beyer, S. W., 1895;Hinds, 1909;Landis and Van Eck, 1965). The lower coal has a maximum thickness of 3 feet but characteristically pinches out over a short distance.…”

“…Cline also believed that this sandstone might be an extension of the Ledges sandstone body. Landis and Van Eck (1965) determined that the upper coal at Boone lies in the upper part of the Lower Cherokee. The cross section indicates that the Ledges sandstone body is higher in the section than the upper coal and, therefore, is younger.…”