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The emission of HCl from calcium chloride during the air–steam gasification of solid fuel in the filtration combustion mode was studied. The limiting amounts of HCl released into the gas phase under real conditions of a shaft kiln gasifier were estimated. It was shown that the most important factors responsible for the stability of CaCl2 are the humidity of an oxidant gas and the process temperature.
It was established that a shift of equilibrium in the graphite–calcium oxide system toward the formation of calcium carbide can be observed at a temperature of 900°C due to the formation of a volatile substance—carbon monoxide. Upon the addition of anthracite, a maximum of calcium carbonate decomposition decreased from 813 to 780°C, and the endothermic effect of the formation of calcium carbide manifested...
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