抄録
Surface-Chemical study of coal was made mainly on some properties related with viscosity and adsorption characteristics as one of the research series to establish the evaluation system of coal for CWM.
Viscosity and adsorption characteristics are affected by oxygen containing functional groups on coal surface, primarily by carboxyl group.Flow patern of CWM is also very sensitive to content of carboxyl group.Although phenolic hydroxyde group is much more in quantity, its effect seems to be considerably weak.
Various parameters on viscosity, zeta potential, adsorptions of water vapor and carbon dioxide, may be given as a function of carboxyl group as shown in the followings,
m=a·Cn
Here, m is amount of change, C is the quantity of carboxyl group, a is constant. Exponent n is generally in the range of 0.42-0.48 except zeta potential, in which case it is 0.22, about a half of those above stated. Ion-exchange resin which functional group is mainly carboxyl, behaves in a similar manner as shown by the above equation.
