| This study was designed to determine the effects of CaCl(,2) solution on lignite coal structure, reactivity, and emissions and on related boiler corrosion. CaCl(,2) is attractive because of its antifreeze and antithawing properties during coal transportation and its catalytic effect during coal combustion.;From reactivity studies, the addition of CaCl(,2) retarded the decomposition of coal in the early stage, due to the effect of chloride; then promoted the decomposition of coal, due to the effect of calcium.;From emissions studies, calcium chloride reduced sulfur emission, which was retained principally as CaSO(,4), and also increased the chloride ion level.;From corrosion studies, calcium chloride reduced sulfur corrosion by lowering the level of sulfur oxides in the gas, but in the presence of higher levels of chlorides, increased the extent of pitting corrosion problems.;Addition of 1.4 wt% CaCl(,2) did not substantially alter the coal structure, based on XRD, IR, density, porosity and light microscopy studies. The only significant difference between untreated char and treated char was that the treated char showed a more disordered structure. |
